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ae3f09246c
sonic-buildimage/platform/mellanox/mlnx-platform-api/sonic_platform/chassis.py
Kebo Liu ae3f09246c [Mellanox] Optimize SFP Platform API implementation (#5476) 
Each SFP object inside Chassis will open an SDK client, this is not necessary and SDK client can be shared between SFP objects.
2020-10-21 08:13:59 -07:00

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#!/usr/bin/env python
#############################################################################
# Mellanox
#
# Module contains an implementation of SONiC Platform Base API and
# provides the Chassis information which are available in the platform
#
#############################################################################
try:
from sonic_platform_base.chassis_base import ChassisBase
from sonic_platform_base.component_base import ComponentBase
from sonic_py_common import device_info
from sonic_py_common.logger import Logger
from os import listdir
from os.path import isfile, join
from glob import glob
import sys
import io
import re
import syslog
except ImportError as e:
raise ImportError (str(e) + "- required module not found")
MAX_SELECT_DELAY = 3600
MLNX_NUM_PSU = 2
EEPROM_CACHE_ROOT = '/var/cache/sonic/decode-syseeprom'
EEPROM_CACHE_FILE = 'syseeprom_cache'
HWMGMT_SYSTEM_ROOT = '/var/run/hw-management/system/'
MST_DEVICE_NAME_PATTERN = '/dev/mst/mt[0-9]*_pciconf0'
MST_DEVICE_RE_PATTERN = '/dev/mst/mt([0-9]*)_pciconf0'
SPECTRUM1_CHIP_ID = '52100'
#reboot cause related definitions
REBOOT_CAUSE_ROOT = HWMGMT_SYSTEM_ROOT
REBOOT_CAUSE_FILE_LENGTH = 1
# Global logger class instance
logger = Logger()
# System LED system fs definitions for 201911 branch only
SYSTEM_STATUS_LED_GREEN_FILE = '/run/hw-management/led/led_status_green'
LED_ON = '1'
# magic code defnition for port number, qsfp port position of each Platform
# port_position_tuple = (PORT_START, QSFP_PORT_START, PORT_END, PORT_IN_BLOCK, EEPROM_OFFSET)
platform_dict_port = {'x86_64-mlnx_msn2010-r0': 3, 'x86_64-mlnx_msn2100-r0': 1, 'x86_64-mlnx_msn2410-r0': 2, 'x86_64-mlnx_msn2700-r0': 0, 'x86_64-mlnx_lssn2700':0, 'x86_64-mlnx_msn2740-r0': 0, 'x86_64-mlnx_msn3420-r0':5, 'x86_64-mlnx_msn3700-r0': 0, 'x86_64-mlnx_msn3700c-r0': 0, 'x86_64-mlnx_msn3800-r0': 4, 'x86_64-mlnx_msn4600c-r0':4, 'x86_64-mlnx_msn4700-r0': 0}
port_position_tuple_list = [(0, 0, 31, 32, 1), (0, 0, 15, 16, 1), (0, 48, 55, 56, 1), (0, 18, 21, 22, 1), (0, 0, 63, 64, 1), (0, 48, 59, 60, 1)]
class Chassis(ChassisBase):
"""Platform-specific Chassis class"""
def __init__(self):
super(Chassis, self).__init__()
self.name = "Undefined"
self.model = "Undefined"
# Initialize Platform name
self.platform_name = device_info.get_platform()
# move the initialization of each components to their dedicated initializer
# which will be called from platform
self.sfp_module_initialized = False
self.sfp_event_initialized = False
self.reboot_cause_initialized = False
self.initialize_system_led()
logger.log_info("Chassis loaded successfully")
def __del__(self):
if self.sfp_event_initialized:
self.sfp_event.deinitialize()
if self.sfp_module_initialized:
from sonic_platform.sfp import deinitialize_sdk_handle
deinitialize_sdk_handle(self.sdk_handle)
def initialize_psu(self):
from sonic_platform.psu import Psu
# Initialize PSU list
self.psu_module = Psu
for index in range(MLNX_NUM_PSU):
psu = Psu(index, self.platform_name)
self._psu_list.append(psu)
def initialize_fan(self):
from sonic_platform.fan import Fan
from sonic_platform.fan import FAN_PATH
self.fan_module = Fan
self.fan_path = FAN_PATH
# Initialize FAN list
multi_rotor_in_drawer = False
num_of_fan, num_of_drawer = self._extract_num_of_fans_and_fan_drawers()
multi_rotor_in_drawer = num_of_fan > num_of_drawer
# Fan's direction isn't supported on spectrum 1 devices for now
mst_dev_list = glob(MST_DEVICE_NAME_PATTERN)
if not mst_dev_list:
raise RuntimeError("Can't get chip type due to {} not found".format(MST_DEVICE_NAME_PATTERN))
m = re.search(MST_DEVICE_RE_PATTERN, mst_dev_list[0])
if m.group(1) == SPECTRUM1_CHIP_ID:
has_fan_dir = False
else:
has_fan_dir = True
for index in range(num_of_fan):
if multi_rotor_in_drawer:
fan = Fan(has_fan_dir, index, index/2, False, self.platform_name)
else:
fan = Fan(has_fan_dir, index, index, False, self.platform_name)
self._fan_list.append(fan)
def initialize_sfp(self):
from sonic_platform.sfp import SFP
from sonic_platform.sfp import initialize_sdk_handle
self.sfp_module = SFP
self.sdk_handle = initialize_sdk_handle()
if self.sdk_handle is None:
self.sfp_module_initialized = False
return
# Initialize SFP list
port_position_tuple = self._get_port_position_tuple_by_platform_name()
self.PORT_START = port_position_tuple[0]
self.QSFP_PORT_START = port_position_tuple[1]
self.PORT_END = port_position_tuple[2]
self.PORTS_IN_BLOCK = port_position_tuple[3]
for index in range(self.PORT_START, self.PORT_END + 1):
if index in range(self.QSFP_PORT_START, self.PORTS_IN_BLOCK + 1):
sfp_module = SFP(index, 'QSFP', self.sdk_handle)
else:
sfp_module = SFP(index, 'SFP', self.sdk_handle)
self._sfp_list.append(sfp_module)
self.sfp_module_initialized = True
def initialize_thermals(self):
from sonic_platform.thermal import initialize_thermals
# Initialize thermals
initialize_thermals(self.platform_name, self._thermal_list, self._psu_list)
def initialize_eeprom(self):
from eeprom import Eeprom
# Initialize EEPROM
self._eeprom = Eeprom()
# Get chassis name and model from eeprom
self.name = self._eeprom.get_product_name()
self.model = self._eeprom.get_part_number()
def initialize_components(self):
# Initialize component list
from sonic_platform.component import ComponentONIE, ComponentSSD, ComponentBIOS, ComponentCPLD
self._component_list.append(ComponentONIE())
self._component_list.append(ComponentSSD())
self._component_list.append(ComponentBIOS())
self._component_list.extend(ComponentCPLD.get_component_list())
def get_name(self):
"""
Retrieves the name of the device
Returns:
string: The name of the device
"""
return self.name
def get_model(self):
"""
Retrieves the model number (or part number) of the device
Returns:
string: Model/part number of device
"""
return self.model
##############################################
# SFP methods
##############################################
def get_num_sfps(self):
"""
Retrieves the number of sfps available on this chassis
Returns:
An integer, the number of sfps available on this chassis
"""
if not self.sfp_module_initialized:
self.initialize_sfp()
return len(self._sfp_list)
def get_all_sfps(self):
"""
Retrieves all sfps available on this chassis
Returns:
A list of objects derived from SfpBase representing all sfps
available on this chassis
"""
if not self.sfp_module_initialized:
self.initialize_sfp()
return self._sfp_list
def get_sfp(self, index):
"""
Retrieves sfp represented by (1-based) index <index>
Args:
index: An integer, the index (1-based) of the sfp to retrieve.
The index should be the sequence of a physical port in a chassis,
starting from 1.
For example, 1 for Ethernet0, 2 for Ethernet4 and so on.
Returns:
An object dervied from SfpBase representing the specified sfp
"""
if not self.sfp_module_initialized:
self.initialize_sfp()
sfp = None
index -= 1
try:
sfp = self._sfp_list[index]
except IndexError:
sys.stderr.write("SFP index {} out of range (0-{})\n".format(
index, len(self._sfp_list)-1))
return sfp
def _extract_num_of_fans_and_fan_drawers(self):
num_of_fan = 0
num_of_drawer = 0
for f in listdir(self.fan_path):
if isfile(join(self.fan_path, f)):
match_obj = re.match('fan(\d+)_speed_get', f)
if match_obj != None:
if int(match_obj.group(1)) > num_of_fan:
num_of_fan = int(match_obj.group(1))
else:
match_obj = re.match('fan(\d+)_status', f)
if match_obj != None and int(match_obj.group(1)) > num_of_drawer:
num_of_drawer = int(match_obj.group(1))
return num_of_fan, num_of_drawer
def _get_port_position_tuple_by_platform_name(self):
position_tuple = port_position_tuple_list[platform_dict_port[self.platform_name]]
return position_tuple
def get_watchdog(self):
"""
Retrieves hardware watchdog device on this chassis
Returns:
An object derived from WatchdogBase representing the hardware
watchdog device
Note:
We overload this method to ensure that watchdog is only initialized
when it is referenced. Currently, only one daemon can open the watchdog.
To initialize watchdog in the constructor causes multiple daemon
try opening watchdog when loading and constructing a chassis object
and fail. By doing so we can eliminate that risk.
"""
try:
if self._watchdog is None:
from sonic_platform.watchdog import get_watchdog
self._watchdog = get_watchdog()
except Exception as e:
logger.log_info("Fail to load watchdog due to {}".format(repr(e)))
return self._watchdog
def get_base_mac(self):
"""
Retrieves the base MAC address for the chassis
Returns:
A string containing the MAC address in the format
'XX:XX:XX:XX:XX:XX'
"""
return self._eeprom.get_base_mac()
def get_serial_number(self):
"""
Retrieves the hardware serial number for the chassis
Returns:
A string containing the hardware serial number for this chassis.
"""
return self._eeprom.get_serial_number()
def get_system_eeprom_info(self):
"""
Retrieves the full content of system EEPROM information for the chassis
Returns:
A dictionary where keys are the type code defined in
OCP ONIE TlvInfo EEPROM format and values are their corresponding
values.
"""
return self._eeprom.get_system_eeprom_info()
def _read_generic_file(self, filename, len):
"""
Read a generic file, returns the contents of the file
"""
result = ''
try:
fileobj = io.open(filename)
result = fileobj.read(len)
fileobj.close()
return result
except Exception as e:
logger.log_info("Fail to read file {} due to {}".format(filename, repr(e)))
return '0'
def _verify_reboot_cause(self, filename):
'''
Open and read the reboot cause file in
/var/run/hwmanagement/system (which is defined as REBOOT_CAUSE_ROOT)
If a reboot cause file doesn't exists, returns '0'.
'''
return bool(int(self._read_generic_file(join(REBOOT_CAUSE_ROOT, filename), REBOOT_CAUSE_FILE_LENGTH).rstrip('\n')))
def initialize_reboot_cause(self):
self.reboot_major_cause_dict = {
'reset_main_pwr_fail' : self.REBOOT_CAUSE_POWER_LOSS,
'reset_aux_pwr_or_ref' : self.REBOOT_CAUSE_POWER_LOSS,
'reset_asic_thermal' : self.REBOOT_CAUSE_THERMAL_OVERLOAD_ASIC,
'reset_hotswap_or_wd' : self.REBOOT_CAUSE_WATCHDOG,
'reset_swb_wd' : self.REBOOT_CAUSE_WATCHDOG,
'reset_sff_wd' : self.REBOOT_CAUSE_WATCHDOG
}
self.reboot_minor_cause_dict = {
'reset_fw_reset' : "Reset by ASIC firmware",
'reset_long_pb' : "Reset by long press on power button",
'reset_short_pb' : "Reset by short press on power button",
'reset_comex_thermal' : "ComEx thermal shutdown",
'reset_comex_pwr_fail' : "ComEx power fail",
'reset_comex_wd' : "Reset requested from ComEx",
'reset_from_asic' : "Reset requested from ASIC",
'reset_reload_bios' : "Reset caused by BIOS reload",
'reset_hotswap_or_halt' : "Reset caused by hotswap or halt",
'reset_from_comex' : "Reset from ComEx",
'reset_voltmon_upgrade_fail': "Reset due to voltage monitor devices upgrade failure"
}
self.reboot_by_software = 'reset_sw_reset'
self.reboot_cause_initialized = True
def get_reboot_cause(self):
"""
Retrieves the cause of the previous reboot
Returns:
A tuple (string, string) where the first element is a string
containing the cause of the previous reboot. This string must be
one of the predefined strings in this class. If the first string
is "REBOOT_CAUSE_HARDWARE_OTHER", the second string can be used
to pass a description of the reboot cause.
"""
#read reboot causes files in the following order
if not self.reboot_cause_initialized:
self.initialize_reboot_cause()
for reset_file, reset_cause in self.reboot_major_cause_dict.iteritems():
if self._verify_reboot_cause(reset_file):
return reset_cause, ''
for reset_file, reset_cause in self.reboot_minor_cause_dict.iteritems():
if self._verify_reboot_cause(reset_file):
return self.REBOOT_CAUSE_HARDWARE_OTHER, reset_cause
if self._verify_reboot_cause(self.reboot_by_software):
logger.log_info("Hardware reboot cause: the system was rebooted due to software requesting")
else:
logger.log_info("Hardware reboot cause: no hardware reboot cause found")
return self.REBOOT_CAUSE_NON_HARDWARE, ''
def _show_capabilities(self):
"""
This function is for debug purpose
Some features require a xSFP module to support some capabilities but it's unrealistic to
check those modules one by one.
So this function is introduce to show some capabilities of all xSFP modules mounted on the device.
"""
for s in self._sfp_list:
try:
print "index {} tx disable {} dom {} calibration {} temp {} volt {} power (tx {} rx {})".format(s.index,
s.dom_tx_disable_supported,
s.dom_supported,
s.calibration,
s.dom_temp_supported,
s.dom_volt_supported,
s.dom_rx_power_supported,
s.dom_tx_power_supported
)
except:
print "fail to retrieve capabilities for module index {}".format(s.index)
def get_change_event(self, timeout=0):
"""
Returns a nested dictionary containing all devices which have
experienced a change at chassis level
Args:
timeout: Timeout in milliseconds (optional). If timeout == 0,
this method will block until a change is detected.
Returns:
(bool, dict):
- True if call successful, False if not;
- A nested dictionary where key is a device type,
value is a dictionary with key:value pairs in the format of
{'device_id':'device_event'},
where device_id is the device ID for this device and
device_event,
status='1' represents device inserted,
status='0' represents device removed.
Ex. {'fan':{'0':'0', '2':'1'}, 'sfp':{'11':'0'}}
indicates that fan 0 has been removed, fan 2
has been inserted and sfp 11 has been removed.
"""
# Initialize SFP event first
if not self.sfp_event_initialized:
from sonic_platform.sfp_event import sfp_event
self.sfp_event = sfp_event()
self.sfp_event.initialize()
self.MAX_SELECT_EVENT_RETURNED = self.PORT_END
self.sfp_event_initialized = True
wait_for_ever = (timeout == 0)
port_dict = {}
if wait_for_ever:
timeout = MAX_SELECT_DELAY
while True:
status = self.sfp_event.check_sfp_status(port_dict, timeout)
if bool(port_dict):
break
else:
status = self.sfp_event.check_sfp_status(port_dict, timeout)
if status:
return True, {'sfp':port_dict}
else:
return True, {'sfp':{}}
def get_thermal_manager(self):
from .thermal_manager import ThermalManager
return ThermalManager
def initialize_system_led(self):
"""
Init system LED color to green.
This is for 201911 branch only
"""
try:
with open(SYSTEM_STATUS_LED_GREEN_FILE, 'w') as f:
f.write(LED_ON)
except:
pass
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