Fix NFAPI integration

This commit fixes issues introduced by the previous commit.

Summary of work:
- cleanup:
  - fix LOG_XX to be less verbose
  - fix cmake_targets/CMakeLists.txt
  - fix oaienv
  - remove dead code
- bug fixes:
  - in openair1/SCHED/fapi_l1.c we had:
      eNB->pdcch_vars[subframe&1].num_dci           = number_dci;
    should be:
      eNB->pdcch_vars[subframe&1].num_dci           = 0;
    This bug let the PHY send more DCIs than what should have been
    sent because num_dci is incremented later on in the code.
    This fix may be a problem for fapi mode, to be checked.
  - add new T VCD traces
  - revert openair1/PHY/TOOLS/file_output.c to 'develop' version
  - remove thread_id in logRecord/logRecord_mt
  - revert (and adapt) configuration files
  - be careful when doing frame++, we need to % 1024
  - revert target_rx_power in openair2/LAYER2/MAC/eNB_scheduler_ulsch.c
- NFAPI:
  - the open-nFAPI code has been included in the repository. See nfapi/README.
    Maybe we should "git clone" the Cisco repository instead. We have to be
    careful of availability though.

What has been tested:
- monolithic eNB FDD 5/10MHz with one UE, iperf UDP/TCP uplink/downlink

Anything else may fail to work, especially the FAPI mode, which has not
been tested at all.

nfapi/open-nFAPI/common/Makefile.am

@@ -0,0 +1,31 @@
+#
+# Copyright 2017 Cisco Systems, Inc.
+# 
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+# 
+# http://www.apache.org/licenses/LICENSE-2.0
+# 
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# 
+
+AM_CPPFLAGS = -I$(top_srcdir)/common/public_inc -g -Wall -Werror
+
+noinst_LIBRARIES =libnfapi_common.a
+
+libnfapi_common_a_SOURCES = src/debug.c 
+
+libnfapi_common_a_CFLAGS =$(AM_CFLAGS)
+
+lib_LTLIBRARIES =libnfapi_common.la
+
+libnfapi_common_la_SOURCES = src/debug.c
+
+
+
+

nfapi/open-nFAPI/common/public_inc/debug.h

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2017 Cisco Systems, Inc.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#ifndef _DEBUG_H_
+#define _DEBUG_H_
+
+/*! The trace levels used by the nfapi libraries */
+typedef enum nfapi_trace_level
+{
+	NFAPI_TRACE_ERROR = 1,
+	NFAPI_TRACE_WARN,
+	NFAPI_TRACE_NOTE,
+	NFAPI_TRACE_INFO,
+
+	NFAPI_TRACE_LEVEL_MAX
+} nfapi_trace_level_t;
+
+/*! The trace function pointer */
+typedef void (*nfapi_trace_fn_t)(nfapi_trace_level_t level, const char* format, ...);
+
+/*! Global trace function */
+extern nfapi_trace_fn_t nfapi_trace_g;
+
+/*! Global trace level */
+extern nfapi_trace_level_t nfapi_trace_level_g;
+
+/*! NFAPI trace macro */
+//#define NFAPI_TRACE(level, format, ...) { if(nfapi_trace_g && ((nfapi_trace_level_t)level <= nfapi_trace_level_g)) (*nfapi_trace_g)(level, format, ##__VA_ARGS__); }
+#define NFAPI_TRACE(level, format, ...) { if (nfapi_trace_g) (*nfapi_trace_g)(level, format, ##__VA_ARGS__); }
+
+/*! Function to change the trace level 
+ * \param new_level The modified trace level
+ */
+
+void nfapi_set_trace_level(nfapi_trace_level_t new_level);
+
+#endif /* _DEBUG_H_ */

nfapi/open-nFAPI/common/src/debug.c

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2017 Cisco Systems, Inc.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <pthread.h>
+#include <syslog.h>
+
+#include <debug.h>
+
+#define MAX_MSG_LENGTH 			2096
+#define TRACE_HEADER_LENGTH		44
+
+void nfapi_trace_dbg(nfapi_trace_level_t level, const char *format, ...);
+
+// initialize the trace function to 0
+void (*nfapi_trace_g)(nfapi_trace_level_t level, const char* format, ...) = &nfapi_trace_dbg;
+
+nfapi_trace_level_t nfapi_trace_level_g = NFAPI_TRACE_INFO;
+//nfapi_trace_level_t nfapi_trace_level_g = NFAPI_TRACE_WARN;
+
+void nfapi_set_trace_level(nfapi_trace_level_t new_level)
+{
+	nfapi_trace_level_g = new_level;
+}
+
+void nfapi_trace_dbg(nfapi_trace_level_t level, const char *format, ...)
+{
+	char trace_buff[MAX_MSG_LENGTH + TRACE_HEADER_LENGTH];
+	uint32_t num_chars;
+	va_list p_args;
+	struct timeval tv;
+	pthread_t tid = pthread_self();
+
+	(void)gettimeofday(&tv, NULL);
+
+	num_chars = (uint32_t)snprintf(trace_buff, TRACE_HEADER_LENGTH, "%04u.%06u: 0x%02x: %10u: ", ((uint32_t)tv.tv_sec) & 0x1FFF, (uint32_t)tv.tv_usec, (uint32_t)level, (uint32_t)tid);
+
+	if (num_chars > TRACE_HEADER_LENGTH)
+	{
+		printf("trace_dbg: Error, num_chars is too large: %d", num_chars);
+		return;
+	}
+
+	va_start(p_args, format);
+	if ((num_chars = (uint32_t)vsnprintf(&trace_buff[num_chars], MAX_MSG_LENGTH, format, p_args)))
+	{
+		if (level <= NFAPI_TRACE_WARN)
+		{
+			printf("%s", trace_buff);
+		}
+		printf("%s", trace_buff);
+	}
+	va_end(p_args);
+}