ceph/src/dpdk/lib/librte_port/rte_port.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  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.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  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
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef __INCLUDE_RTE_PORT_H__
  35 #define __INCLUDE_RTE_PORT_H__
  36
  37 #ifdef __cplusplus
  38 extern "C" {
  39 #endif
  40
  41 /**
  42  * @file
  43  * RTE Port
  44  *
  45  * This tool is part of the DPDK Packet Framework tool suite and provides
  46  * a standard interface to implement different types of packet ports.
  47  *
  48  ***/
  49
  50 #include <stdint.h>
  51 #include <rte_mbuf.h>
  52
  53 /**@{
  54  * Macros to allow accessing metadata stored in the mbuf headroom
  55  * just beyond the end of the mbuf data structure returned by a port
  56  */
  57 #define RTE_MBUF_METADATA_UINT8_PTR(mbuf, offset)          \
  58         (&((uint8_t *)(mbuf))[offset])
  59 #define RTE_MBUF_METADATA_UINT16_PTR(mbuf, offset)         \
  60         ((uint16_t *) RTE_MBUF_METADATA_UINT8_PTR(mbuf, offset))
  61 #define RTE_MBUF_METADATA_UINT32_PTR(mbuf, offset)         \
  62         ((uint32_t *) RTE_MBUF_METADATA_UINT8_PTR(mbuf, offset))
  63 #define RTE_MBUF_METADATA_UINT64_PTR(mbuf, offset)         \
  64         ((uint64_t *) RTE_MBUF_METADATA_UINT8_PTR(mbuf, offset))
  65
  66 #define RTE_MBUF_METADATA_UINT8(mbuf, offset)              \
  67         (*RTE_MBUF_METADATA_UINT8_PTR(mbuf, offset))
  68 #define RTE_MBUF_METADATA_UINT16(mbuf, offset)             \
  69         (*RTE_MBUF_METADATA_UINT16_PTR(mbuf, offset))
  70 #define RTE_MBUF_METADATA_UINT32(mbuf, offset)             \
  71         (*RTE_MBUF_METADATA_UINT32_PTR(mbuf, offset))
  72 #define RTE_MBUF_METADATA_UINT64(mbuf, offset)             \
  73         (*RTE_MBUF_METADATA_UINT64_PTR(mbuf, offset))
  74 /**@}*/
  75
  76 /*
  77  * Port IN
  78  *
  79  */
  80 /** Maximum number of packets read from any input port in a single burst.
  81 Cannot be changed. */
  82 #define RTE_PORT_IN_BURST_SIZE_MAX                         64
  83
  84 /** Input port statistics */
  85 struct rte_port_in_stats {
  86         uint64_t n_pkts_in;
  87         uint64_t n_pkts_drop;
  88 };
  89
  90 /**
  91  * Input port create
  92  *
  93  * @param params
  94  *   Parameters for input port creation
  95  * @param socket_id
  96  *   CPU socket ID (e.g. for memory allocation purpose)
  97  * @return
  98  *   Handle to input port instance
  99  */
 100 typedef void* (*rte_port_in_op_create)(void *params, int socket_id);
 101
 102 /**
 103  * Input port free
 104  *
 105  * @param port
 106  *   Handle to input port instance
 107  * @return
 108  *   0 on success, error code otherwise
 109  */
 110 typedef int (*rte_port_in_op_free)(void *port);
 111
 112 /**
 113  * Input port packet burst RX
 114  *
 115  * @param port
 116  *   Handle to input port instance
 117  * @param pkts
 118  *   Burst of input packets
 119  * @param n_pkts
 120  *   Number of packets in the input burst
 121  * @return
 122  *   0 on success, error code otherwise
 123  */
 124 typedef int (*rte_port_in_op_rx)(
 125         void *port,
 126         struct rte_mbuf **pkts,
 127         uint32_t n_pkts);
 128
 129 /**
 130  * Input port stats get
 131  *
 132  * @param port
 133  *   Handle to output port instance
 134  * @param stats
 135  *   Handle to port_in stats struct to copy data
 136  * @param clear
 137  *   Flag indicating that stats should be cleared after read
 138  *
 139  * @return
 140  *   Error code or 0 on success.
 141  */
 142 typedef int (*rte_port_in_op_stats_read)(
 143                 void *port,
 144                 struct rte_port_in_stats *stats,
 145                 int clear);
 146
 147 /** Input port interface defining the input port operation */
 148 struct rte_port_in_ops {
 149         rte_port_in_op_create f_create;      /**< Create */
 150         rte_port_in_op_free f_free;          /**< Free */
 151         rte_port_in_op_rx f_rx;              /**< Packet RX (packet burst) */
 152         rte_port_in_op_stats_read f_stats;   /**< Stats */
 153 };
 154
 155 /*
 156  * Port OUT
 157  *
 158  */
 159 /** Output port statistics */
 160 struct rte_port_out_stats {
 161         uint64_t n_pkts_in;
 162         uint64_t n_pkts_drop;
 163 };
 164
 165 /**
 166  * Output port create
 167  *
 168  * @param params
 169  *   Parameters for output port creation
 170  * @param socket_id
 171  *   CPU socket ID (e.g. for memory allocation purpose)
 172  * @return
 173  *   Handle to output port instance
 174  */
 175 typedef void* (*rte_port_out_op_create)(void *params, int socket_id);
 176
 177 /**
 178  * Output port free
 179  *
 180  * @param port
 181  *   Handle to output port instance
 182  * @return
 183  *   0 on success, error code otherwise
 184  */
 185 typedef int (*rte_port_out_op_free)(void *port);
 186
 187 /**
 188  * Output port single packet TX
 189  *
 190  * @param port
 191  *   Handle to output port instance
 192  * @param pkt
 193  *   Input packet
 194  * @return
 195  *   0 on success, error code otherwise
 196  */
 197 typedef int (*rte_port_out_op_tx)(
 198         void *port,
 199         struct rte_mbuf *pkt);
 200
 201 /**
 202  * Output port packet burst TX
 203  *
 204  * @param port
 205  *   Handle to output port instance
 206  * @param pkts
 207  *   Burst of input packets specified as array of up to 64 pointers to struct
 208  *   rte_mbuf
 209  * @param pkts_mask
 210  *   64-bit bitmask specifying which packets in the input burst are valid. When
 211  *   pkts_mask bit n is set, then element n of pkts array is pointing to a
 212  *   valid packet. Otherwise, element n of pkts array will not be accessed.
 213  * @return
 214  *   0 on success, error code otherwise
 215  */
 216 typedef int (*rte_port_out_op_tx_bulk)(
 217         void *port,
 218         struct rte_mbuf **pkt,
 219         uint64_t pkts_mask);
 220
 221 /**
 222  * Output port flush
 223  *
 224  * @param port
 225  *   Handle to output port instance
 226  * @return
 227  *   0 on success, error code otherwise
 228  */
 229 typedef int (*rte_port_out_op_flush)(void *port);
 230
 231 /**
 232  * Output port stats read
 233  *
 234  * @param port
 235  *   Handle to output port instance
 236  * @param stats
 237  *   Handle to port_out stats struct to copy data
 238  * @param clear
 239  *   Flag indicating that stats should be cleared after read
 240  *
 241  * @return
 242  *   Error code or 0 on success.
 243  */
 244 typedef int (*rte_port_out_op_stats_read)(
 245                 void *port,
 246                 struct rte_port_out_stats *stats,
 247                 int clear);
 248
 249 /** Output port interface defining the output port operation */
 250 struct rte_port_out_ops {
 251         rte_port_out_op_create f_create;      /**< Create */
 252         rte_port_out_op_free f_free;          /**< Free */
 253         rte_port_out_op_tx f_tx;              /**< Packet TX (single packet) */
 254         rte_port_out_op_tx_bulk f_tx_bulk;    /**< Packet TX (packet burst) */
 255         rte_port_out_op_flush f_flush;        /**< Flush */
 256         rte_port_out_op_stats_read f_stats;   /**< Stats */
 257 };
 258
 259 #ifdef __cplusplus
 260 }
 261 #endif
 262
 263 #endif