Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_port / rte_port_frag.h

diff --git a/lib/librte_port/rte_port_frag.h b/lib/librte_port/rte_port_frag.h
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+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __INCLUDE_RTE_PORT_IP_FRAG_H__
+#define __INCLUDE_RTE_PORT_IP_FRAG_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @file
+ * RTE Port for IPv4 Fragmentation
+ *
+ * This port is built on top of pre-initialized single consumer rte_ring. In
+ * order to minimize the amount of packets stored in the ring at any given
+ * time, the IP fragmentation functionality is executed on ring read operation,
+ * hence this port is implemented as an input port. A regular ring_writer port
+ * can be created to write to the same ring.
+ *
+ * The packets written to the ring are either complete IP datagrams or jumbo
+ * frames (i.e. IP packets with length bigger than provided MTU value). The
+ * packets read from the ring are all non-jumbo frames. The complete IP
+ * datagrams written to the ring are not changed. The jumbo frames are
+ * fragmented into several IP packets with length less or equal to MTU.
+ *
+ ***/
+
+#include <stdint.h>
+
+#include <rte_ring.h>
+
+#include "rte_port.h"
+
+/** ring_reader_ipv4_frag port parameters */
+struct rte_port_ring_reader_frag_params {
+       /** Underlying single consumer ring that has to be pre-initialized. */
+       struct rte_ring *ring;
+
+       /** Maximum Transfer Unit (MTU). Maximum IP packet size (in bytes). */
+       uint32_t mtu;
+
+       /** Size of application dependent meta-data stored per each input packet
+           that has to be copied to each of the fragments originating from the
+           same input IP datagram. */
+       uint32_t metadata_size;
+
+       /** Pre-initialized buffer pool used for allocating direct buffers for
+           the output fragments. */
+       struct rte_mempool *pool_direct;
+
+       /** Pre-initialized buffer pool used for allocating indirect buffers for
+           the output fragments. */
+       struct rte_mempool *pool_indirect;
+};
+
+#define rte_port_ring_reader_ipv4_frag_params rte_port_ring_reader_frag_params
+
+#define rte_port_ring_reader_ipv6_frag_params rte_port_ring_reader_frag_params
+
+/** ring_reader_ipv4_frag port operations */
+extern struct rte_port_in_ops rte_port_ring_reader_ipv4_frag_ops;
+
+/** ring_reader_ipv6_frag port operations */
+extern struct rte_port_in_ops rte_port_ring_reader_ipv6_frag_ops;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif