[platform]: BFN platform modules update (sonic-net#3389)

* Fixed initial state for eeprom.py and sfputil.py when thrift server is down
* Added transceiver plug-in/out event processing

Signed-off-by: Andriy Kokhan <akokhan@barefootnetworks.com>

device/barefoot/x86_64-accton_wedge100bf_32x-r0/plugins/eeprom.py

@@ -9,6 +9,9 @@
     import sys
     import errno
     import datetime
+    import logging
+    import logging.config
+    import yaml
 
     sys.path.append(os.path.dirname(__file__))
     import pltfm_mgr_rpc
@@ -71,13 +74,17 @@
 pltfm_mgr = None
 
 EEPROM_SYMLINK = "/var/run/platform/eeprom/syseeprom"
-
+EEPROM_STATUS = "/var/run/platform/eeprom/status"
 
 class board(eeprom_tlvinfo.TlvInfoDecoder):
-    RETRIES = 30
+    RETRIES = 3
 
     def __init__(self, name, path, cpld_root, ro):
 
+        with open(os.path.dirname(__file__) + "/logging.conf", 'r') as f:
+            config_dict = yaml.load(f)
+            logging.config.dictConfig(config_dict)
+
         if not os.path.exists(os.path.dirname(EEPROM_SYMLINK)):
             try:
                 os.makedirs(os.path.dirname(EEPROM_SYMLINK))
@@ -86,19 +93,17 @@ def __init__(self, name, path, cpld_root, ro):
                     raise
 
         open(EEPROM_SYMLINK, 'a').close()
+        f = open(EEPROM_STATUS, 'w')
+        f.write("initializing..")
+        f.close()
 
         self.eeprom_path = EEPROM_SYMLINK
-        super(board, self).__init__(self.eeprom_path, 0, '', True)
+        super(board, self).__init__(self.eeprom_path, 0, EEPROM_STATUS, True)
 
-        for attempt in range(self.RETRIES + 1):
-            if not self.eeprom_init():
-                time.sleep(1)
-            else:
+        for attempt in range(self.RETRIES):
+            if self.eeprom_init() or (attempt + 1 >= self.RETRIES):
                 break
-
-        if attempt == self.RETRIES:
-            raise RuntimeError("Could not initialize syseeprom")
-
+            time.sleep(1)
 
     def thrift_setup(self):
         global thrift_server, transport, pltfm_mgr
@@ -119,13 +124,18 @@ def thrift_teardown(self):
 
     def eeprom_init(self):
         global pltfm_mgr
+
         try:
-           self.thrift_setup()
-           eeprom = pltfm_mgr.pltfm_mgr_sys_eeprom_get()
-           self.thrift_teardown()
+            self.thrift_setup()
+            eeprom = pltfm_mgr.pltfm_mgr_sys_eeprom_get()
+            self.thrift_teardown()
         except:
             return False
 
+        f = open(EEPROM_STATUS, 'w')
+        f.write("ok")
+        f.close()
+
         eeprom_params = ""
         for attr, val in eeprom.__dict__.iteritems():
             if val is None:

device/barefoot/x86_64-accton_wedge100bf_32x-r0/plugins/logging.conf

@@ -0,0 +1,17 @@
+version: 1
+disable_existing_loggers: False
+
+formatters:
+  simple:
+    format: '%(asctime)s  %(name)-30s %(levelname)-7s %(message)s'
+
+handlers:
+    file:
+        class: logging.handlers.RotatingFileHandler
+        formatter: simple
+        filename: /var/log/platform.log
+
+root:
+    level: ERROR
+    handlers:
+        - file

device/barefoot/x86_64-accton_wedge100bf_32x-r0/plugins/sfputil.py

@@ -34,6 +34,7 @@ class SfpUtil(SfpUtilBase):
     QSFP_PORT_START = 1
     QSFP_PORT_END = 0
     EEPROM_OFFSET = 0
+    QSFP_CHECK_INTERVAL = 4
 
     @property
     def port_start(self):
@@ -56,6 +57,11 @@ def port_to_eeprom_mapping(self):
         raise Exception() 
 
     def __init__(self):
+        self.ready = False
+        self.phy_port_dict = {'-1': 'system_not_ready'}
+        self.phy_port_cur_state = {}
+        self.qsfp_interval = self.QSFP_CHECK_INTERVAL
+
         if not os.path.exists(os.path.dirname(SFP_EEPROM_CACHE)):
             try:
                 os.makedirs(os.path.dirname(SFP_EEPROM_CACHE))
@@ -142,12 +148,76 @@ def reset(self, port_num):
         self.thrift_teardown()
         return status
 
+    def check_transceiver_change(self):
+        if not self.ready:
+            return
+
+        self.phy_port_dict = {}
+
+        try:
+            self.thrift_setup()
+        except:
+            return
+
+        # Get presence of each SFP
+        for port in range(self.port_start, self.port_end + 1):
+            try:
+                sfp_resent = pltfm_mgr.pltfm_mgr_qsfp_presence_get(port)
+            except:
+                sfp_resent = False
+            sfp_state = '1' if sfp_resent else '0'
+
+            if port in self.phy_port_cur_state:
+                if self.phy_port_cur_state[port] != sfp_state:
+                    self.phy_port_dict[port] = sfp_state
+            else:
+                self.phy_port_dict[port] = sfp_state
+
+            # Update port current state
+            self.phy_port_cur_state[port] = sfp_state
+
+        self.thrift_teardown()
+
     def get_transceiver_change_event(self, timeout=0):
-        phy_port_dict = {}
-        status = True
-        # TODO: Process transceiver plug-in/out event
-        time.sleep(1)
-        return status, phy_port_dict
+        forever = False
+        if timeout == 0:
+            forever = True
+        elif timeout > 0:
+            timeout = timeout / float(1000) # Convert to secs
+        else:
+            print "get_transceiver_change_event:Invalid timeout value", timeout
+            return False, {}
+
+        while forever or timeout > 0:
+            if not self.ready:
+                try:
+                    self.thrift_setup()
+                    self.thrift_teardown()
+                except:
+                    pass
+                else:
+                    self.ready = True
+                    self.phy_port_dict = {}
+                    break
+            elif self.qsfp_interval == 0:
+                self.qsfp_interval = self.QSFP_CHECK_INTERVAL
+
+                # Process transceiver plug-in/out event
+                self.check_transceiver_change()
+
+                # Break if tranceiver state has changed
+                if bool(self.phy_port_dict):
+                    break
+
+            if timeout:
+                timeout -= 1
+
+            if self.qsfp_interval:
+                self.qsfp_interval -= 1
+
+            time.sleep(1)
+
+        return self.ready, self.phy_port_dict
 
     def _get_port_eeprom_path(self, port_num, devid):
         eeprom_path = None