ceph/src/seastar/dpdk/lib/librte_port/rte_port_frag.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
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   7  *   Redistribution and use in source and binary forms, with or without
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  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
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  19  *       from this software without specific prior written permission.
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  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef __INCLUDE_RTE_PORT_IP_FRAG_H__
  35 #define __INCLUDE_RTE_PORT_IP_FRAG_H__
  36
  37 #ifdef __cplusplus
  38 extern "C" {
  39 #endif
  40
  41 /**
  42  * @file
  43  * RTE Port for IPv4 Fragmentation
  44  *
  45  * This port is built on top of pre-initialized single consumer rte_ring. In
  46  * order to minimize the amount of packets stored in the ring at any given
  47  * time, the IP fragmentation functionality is executed on ring read operation,
  48  * hence this port is implemented as an input port. A regular ring_writer port
  49  * can be created to write to the same ring.
  50  *
  51  * The packets written to the ring are either complete IP datagrams or jumbo
  52  * frames (i.e. IP packets with length bigger than provided MTU value). The
  53  * packets read from the ring are all non-jumbo frames. The complete IP
  54  * datagrams written to the ring are not changed. The jumbo frames are
  55  * fragmented into several IP packets with length less or equal to MTU.
  56  *
  57  ***/
  58
  59 #include <stdint.h>
  60
  61 #include <rte_ring.h>
  62
  63 #include "rte_port.h"
  64
  65 /** ring_reader_ipv4_frag port parameters */
  66 struct rte_port_ring_reader_frag_params {
  67         /** Underlying single consumer ring that has to be pre-initialized. */
  68         struct rte_ring *ring;
  69
  70         /** Maximum Transfer Unit (MTU). Maximum IP packet size (in bytes). */
  71         uint32_t mtu;
  72
  73         /** Size of application dependent meta-data stored per each input packet
  74             that has to be copied to each of the fragments originating from the
  75             same input IP datagram. */
  76         uint32_t metadata_size;
  77
  78         /** Pre-initialized buffer pool used for allocating direct buffers for
  79             the output fragments. */
  80         struct rte_mempool *pool_direct;
  81
  82         /** Pre-initialized buffer pool used for allocating indirect buffers for
  83             the output fragments. */
  84         struct rte_mempool *pool_indirect;
  85 };
  86
  87 #define rte_port_ring_reader_ipv4_frag_params rte_port_ring_reader_frag_params
  88
  89 #define rte_port_ring_reader_ipv6_frag_params rte_port_ring_reader_frag_params
  90
  91 /** ring_reader_ipv4_frag port operations */
  92 extern struct rte_port_in_ops rte_port_ring_reader_ipv4_frag_ops;
  93
  94 /** ring_reader_ipv6_frag port operations */
  95 extern struct rte_port_in_ops rte_port_ring_reader_ipv6_frag_ops;
  96
  97 #ifdef __cplusplus
  98 }
  99 #endif
 100
 101 #endif