core: Rmnet initial commit

Inital commit of rmnet_core net device driver in dlkm form
in datarmnet. This requires rmnet to be disabled in the
kernel and for it to be loaded before dependent modules.

CRs-Fixed: 2558810
Change-Id: I742e85033fa0999bf9069d43ce73ab9a622a8388
Acked-by: Raul Martinez <mraul@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>

core/rmnet_handlers.h

@@ -0,0 +1,35 @@
+/* Copyright (c) 2013, 2016-2017, 2019, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * RMNET Data ingress/egress handler
+ *
+ */
+
+#ifndef _RMNET_HANDLERS_H_
+#define _RMNET_HANDLERS_H_
+
+#include "rmnet_config.h"
+
+enum rmnet_packet_context {
+	RMNET_NET_RX_CTX,
+	RMNET_WQ_CTX,
+};
+
+void rmnet_egress_handler(struct sk_buff *skb);
+void rmnet_deliver_skb(struct sk_buff *skb, struct rmnet_port *port);
+void rmnet_deliver_skb_wq(struct sk_buff *skb, struct rmnet_port *port,
+			  enum rmnet_packet_context ctx);
+void rmnet_set_skb_proto(struct sk_buff *skb);
+rx_handler_result_t _rmnet_map_ingress_handler(struct sk_buff *skb,
+					       struct rmnet_port *port);
+rx_handler_result_t rmnet_rx_handler(struct sk_buff **pskb);
+
+#endif /* _RMNET_HANDLERS_H_ */