net: Add function that feeds data to RX fifo

Network drivers should call this when new data has been
received from network.

Change-Id: Ife78fa0683b8c410c38358300a6a18e9325f0ef8
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>

include/net/yaip/net_core.h

@@ -0,0 +1,60 @@
+/** @file
+ * @brief Network core definitions
+ *
+ * Definitions for networking support.
+ */
+
+/*
+ * Copyright (c) 2015 Intel Corporation
+ *
+ * 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 __NET_CORE_H
+#define __NET_CORE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Network subsystem logging helpers */
+
+#ifdef CONFIG_NETWORKING_WITH_LOGGING
+#define NET_DBG(fmt, ...) printk("net: %s (%p): " fmt, __func__, \
+				 sys_thread_self_get(), ##__VA_ARGS__)
+#define NET_ERR(fmt, ...) printk("net: %s: " fmt, __func__, ##__VA_ARGS__)
+#define NET_INFO(fmt, ...) printk("net: " fmt,  ##__VA_ARGS__)
+#define NET_PRINT(fmt, ...) printk(fmt, ##__VA_ARGS__)
+#else
+#define NET_DBG(...)
+#define NET_ERR(...)
+#define NET_INFO(...)
+#define NET_PRINT(...)
+#endif /* CONFIG_NETWORKING_WITH_LOGGING */
+
+struct net_buf;
+struct net_context;
+
+#include <misc/printk.h>
+#include <string.h>
+
+#include <net/net_if.h>
+
+/* Called by lower network stack when a network packet has been received */
+int net_recv(struct net_if *iface, struct net_buf *buf);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __NET_CORE_H */

net/yaip/net_core.c

@@ -32,6 +32,9 @@
 #include <string.h>
 #include <errno.h>
 
+#include <net/net_if.h>
+#include <net/buf.h>
+
 /* Stack for the rx fiber.
  */
 #if !defined(CONFIG_NET_RX_STACK_SIZE)
@@ -55,6 +58,18 @@ static void init_rx_queue(void)
 		    net_rx_fiber, 0, 0, 7, 0);
 }
 
+/* Called by driver when an IP packet has been received */
+int net_recv(struct net_if *iface, struct net_buf *buf)
+{
+	if (!buf->frags) {
+		return -ENODATA;
+	}
+
+	nano_fifo_put(&rx_queue, buf);
+
+	return 0;
+}
+
 static int network_initialization(void)
 {