Implement SMM data extension

Do the SMM specific commands to get the serial number and model
number.

Change-Id: Iddc84c386996a2f93974e65980ed6f928105d87f

pyghmi/ipmi/oem/lenovo/handler.py

@@ -496,6 +496,9 @@ class OEMHandler(generic.OEMHandler):
             except (AttributeError, KeyError, IndexError):
                 pass
             return fru
+        elif self.is_fpc == 2:  # SMM variant
+            fru['oem_parser'] = 'lenovo'
+            return self.smmhandler.process_fru(fru)
         else:
             fru['oem_parser'] = None
             return fru

pyghmi/ipmi/oem/lenovo/nextscale.py

@@ -240,6 +240,16 @@ class SMMClient(object):
         self.password = ipmicmd.ipmi_session.password
         self._wc = None
 
+    def process_fru(self, fru):
+        # TODO(jjohnson2): can also get EIOM, SMM, and riser data if warranted
+        fru['Serial Number'] = self.ipmicmd.xraw_command(
+            netfn=0x32, command=0xb0, data=(5, 1))['data'][:].strip().replace(
+                '\xff', '')
+        fru['Model'] = self.ipmicmd.xraw_command(
+            netfn=0x32, command=0xb0, data=(5, 0))['data'][:].strip().replace(
+                '\xff', '')
+        return fru
+
     def get_webclient(self):
         cv = self.ipmicmd.certverify
         wc = webclient.SecureHTTPConnection(self.smm, 443, verifycallback=cv)