linux/include/rdma/ib_pack.h
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   1/*
   2 * Copyright (c) 2004 Topspin Corporation.  All rights reserved.
   3 *
   4 * This software is available to you under a choice of one of two
   5 * licenses.  You may choose to be licensed under the terms of the GNU
   6 * General Public License (GPL) Version 2, available from the file
   7 * COPYING in the main directory of this source tree, or the
   8 * OpenIB.org BSD license below:
   9 *
  10 *     Redistribution and use in source and binary forms, with or
  11 *     without modification, are permitted provided that the following
  12 *     conditions are met:
  13 *
  14 *      - Redistributions of source code must retain the above
  15 *        copyright notice, this list of conditions and the following
  16 *        disclaimer.
  17 *
  18 *      - Redistributions in binary form must reproduce the above
  19 *        copyright notice, this list of conditions and the following
  20 *        disclaimer in the documentation and/or other materials
  21 *        provided with the distribution.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30 * SOFTWARE.
  31 */
  32
  33#ifndef IB_PACK_H
  34#define IB_PACK_H
  35
  36#include <rdma/ib_verbs.h>
  37
  38enum {
  39        IB_LRH_BYTES  = 8,
  40        IB_ETH_BYTES  = 14,
  41        IB_VLAN_BYTES = 4,
  42        IB_GRH_BYTES  = 40,
  43        IB_BTH_BYTES  = 12,
  44        IB_DETH_BYTES = 8
  45};
  46
  47struct ib_field {
  48        size_t struct_offset_bytes;
  49        size_t struct_size_bytes;
  50        int    offset_words;
  51        int    offset_bits;
  52        int    size_bits;
  53        char  *field_name;
  54};
  55
  56#define RESERVED \
  57        .field_name          = "reserved"
  58
  59/*
  60 * This macro cleans up the definitions of constants for BTH opcodes.
  61 * It is used to define constants such as IB_OPCODE_UD_SEND_ONLY,
  62 * which becomes IB_OPCODE_UD + IB_OPCODE_SEND_ONLY, and this gives
  63 * the correct value.
  64 *
  65 * In short, user code should use the constants defined using the
  66 * macro rather than worrying about adding together other constants.
  67*/
  68#define IB_OPCODE(transport, op) \
  69        IB_OPCODE_ ## transport ## _ ## op = \
  70                IB_OPCODE_ ## transport + IB_OPCODE_ ## op
  71
  72enum {
  73        /* transport types -- just used to define real constants */
  74        IB_OPCODE_RC                                = 0x00,
  75        IB_OPCODE_UC                                = 0x20,
  76        IB_OPCODE_RD                                = 0x40,
  77        IB_OPCODE_UD                                = 0x60,
  78
  79        /* operations -- just used to define real constants */
  80        IB_OPCODE_SEND_FIRST                        = 0x00,
  81        IB_OPCODE_SEND_MIDDLE                       = 0x01,
  82        IB_OPCODE_SEND_LAST                         = 0x02,
  83        IB_OPCODE_SEND_LAST_WITH_IMMEDIATE          = 0x03,
  84        IB_OPCODE_SEND_ONLY                         = 0x04,
  85        IB_OPCODE_SEND_ONLY_WITH_IMMEDIATE          = 0x05,
  86        IB_OPCODE_RDMA_WRITE_FIRST                  = 0x06,
  87        IB_OPCODE_RDMA_WRITE_MIDDLE                 = 0x07,
  88        IB_OPCODE_RDMA_WRITE_LAST                   = 0x08,
  89        IB_OPCODE_RDMA_WRITE_LAST_WITH_IMMEDIATE    = 0x09,
  90        IB_OPCODE_RDMA_WRITE_ONLY                   = 0x0a,
  91        IB_OPCODE_RDMA_WRITE_ONLY_WITH_IMMEDIATE    = 0x0b,
  92        IB_OPCODE_RDMA_READ_REQUEST                 = 0x0c,
  93        IB_OPCODE_RDMA_READ_RESPONSE_FIRST          = 0x0d,
  94        IB_OPCODE_RDMA_READ_RESPONSE_MIDDLE         = 0x0e,
  95        IB_OPCODE_RDMA_READ_RESPONSE_LAST           = 0x0f,
  96        IB_OPCODE_RDMA_READ_RESPONSE_ONLY           = 0x10,
  97        IB_OPCODE_ACKNOWLEDGE                       = 0x11,
  98        IB_OPCODE_ATOMIC_ACKNOWLEDGE                = 0x12,
  99        IB_OPCODE_COMPARE_SWAP                      = 0x13,
 100        IB_OPCODE_FETCH_ADD                         = 0x14,
 101
 102        /* real constants follow -- see comment about above IB_OPCODE()
 103           macro for more details */
 104
 105        /* RC */
 106        IB_OPCODE(RC, SEND_FIRST),
 107        IB_OPCODE(RC, SEND_MIDDLE),
 108        IB_OPCODE(RC, SEND_LAST),
 109        IB_OPCODE(RC, SEND_LAST_WITH_IMMEDIATE),
 110        IB_OPCODE(RC, SEND_ONLY),
 111        IB_OPCODE(RC, SEND_ONLY_WITH_IMMEDIATE),
 112        IB_OPCODE(RC, RDMA_WRITE_FIRST),
 113        IB_OPCODE(RC, RDMA_WRITE_MIDDLE),
 114        IB_OPCODE(RC, RDMA_WRITE_LAST),
 115        IB_OPCODE(RC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
 116        IB_OPCODE(RC, RDMA_WRITE_ONLY),
 117        IB_OPCODE(RC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
 118        IB_OPCODE(RC, RDMA_READ_REQUEST),
 119        IB_OPCODE(RC, RDMA_READ_RESPONSE_FIRST),
 120        IB_OPCODE(RC, RDMA_READ_RESPONSE_MIDDLE),
 121        IB_OPCODE(RC, RDMA_READ_RESPONSE_LAST),
 122        IB_OPCODE(RC, RDMA_READ_RESPONSE_ONLY),
 123        IB_OPCODE(RC, ACKNOWLEDGE),
 124        IB_OPCODE(RC, ATOMIC_ACKNOWLEDGE),
 125        IB_OPCODE(RC, COMPARE_SWAP),
 126        IB_OPCODE(RC, FETCH_ADD),
 127
 128        /* UC */
 129        IB_OPCODE(UC, SEND_FIRST),
 130        IB_OPCODE(UC, SEND_MIDDLE),
 131        IB_OPCODE(UC, SEND_LAST),
 132        IB_OPCODE(UC, SEND_LAST_WITH_IMMEDIATE),
 133        IB_OPCODE(UC, SEND_ONLY),
 134        IB_OPCODE(UC, SEND_ONLY_WITH_IMMEDIATE),
 135        IB_OPCODE(UC, RDMA_WRITE_FIRST),
 136        IB_OPCODE(UC, RDMA_WRITE_MIDDLE),
 137        IB_OPCODE(UC, RDMA_WRITE_LAST),
 138        IB_OPCODE(UC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
 139        IB_OPCODE(UC, RDMA_WRITE_ONLY),
 140        IB_OPCODE(UC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
 141
 142        /* RD */
 143        IB_OPCODE(RD, SEND_FIRST),
 144        IB_OPCODE(RD, SEND_MIDDLE),
 145        IB_OPCODE(RD, SEND_LAST),
 146        IB_OPCODE(RD, SEND_LAST_WITH_IMMEDIATE),
 147        IB_OPCODE(RD, SEND_ONLY),
 148        IB_OPCODE(RD, SEND_ONLY_WITH_IMMEDIATE),
 149        IB_OPCODE(RD, RDMA_WRITE_FIRST),
 150        IB_OPCODE(RD, RDMA_WRITE_MIDDLE),
 151        IB_OPCODE(RD, RDMA_WRITE_LAST),
 152        IB_OPCODE(RD, RDMA_WRITE_LAST_WITH_IMMEDIATE),
 153        IB_OPCODE(RD, RDMA_WRITE_ONLY),
 154        IB_OPCODE(RD, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
 155        IB_OPCODE(RD, RDMA_READ_REQUEST),
 156        IB_OPCODE(RD, RDMA_READ_RESPONSE_FIRST),
 157        IB_OPCODE(RD, RDMA_READ_RESPONSE_MIDDLE),
 158        IB_OPCODE(RD, RDMA_READ_RESPONSE_LAST),
 159        IB_OPCODE(RD, RDMA_READ_RESPONSE_ONLY),
 160        IB_OPCODE(RD, ACKNOWLEDGE),
 161        IB_OPCODE(RD, ATOMIC_ACKNOWLEDGE),
 162        IB_OPCODE(RD, COMPARE_SWAP),
 163        IB_OPCODE(RD, FETCH_ADD),
 164
 165        /* UD */
 166        IB_OPCODE(UD, SEND_ONLY),
 167        IB_OPCODE(UD, SEND_ONLY_WITH_IMMEDIATE)
 168};
 169
 170enum {
 171        IB_LNH_RAW        = 0,
 172        IB_LNH_IP         = 1,
 173        IB_LNH_IBA_LOCAL  = 2,
 174        IB_LNH_IBA_GLOBAL = 3
 175};
 176
 177struct ib_unpacked_lrh {
 178        u8        virtual_lane;
 179        u8        link_version;
 180        u8        service_level;
 181        u8        link_next_header;
 182        __be16    destination_lid;
 183        __be16    packet_length;
 184        __be16    source_lid;
 185};
 186
 187struct ib_unpacked_grh {
 188        u8           ip_version;
 189        u8           traffic_class;
 190        __be32       flow_label;
 191        __be16       payload_length;
 192        u8           next_header;
 193        u8           hop_limit;
 194        union ib_gid source_gid;
 195        union ib_gid destination_gid;
 196};
 197
 198struct ib_unpacked_bth {
 199        u8           opcode;
 200        u8           solicited_event;
 201        u8           mig_req;
 202        u8           pad_count;
 203        u8           transport_header_version;
 204        __be16       pkey;
 205        __be32       destination_qpn;
 206        u8           ack_req;
 207        __be32       psn;
 208};
 209
 210struct ib_unpacked_deth {
 211        __be32       qkey;
 212        __be32       source_qpn;
 213};
 214
 215struct ib_unpacked_eth {
 216        u8      dmac_h[4];
 217        u8      dmac_l[2];
 218        u8      smac_h[2];
 219        u8      smac_l[4];
 220        __be16  type;
 221};
 222
 223struct ib_unpacked_vlan {
 224        __be16  tag;
 225        __be16  type;
 226};
 227
 228struct ib_ud_header {
 229        int                     lrh_present;
 230        struct ib_unpacked_lrh  lrh;
 231        int                     eth_present;
 232        struct ib_unpacked_eth  eth;
 233        int                     vlan_present;
 234        struct ib_unpacked_vlan vlan;
 235        int                     grh_present;
 236        struct ib_unpacked_grh  grh;
 237        struct ib_unpacked_bth  bth;
 238        struct ib_unpacked_deth deth;
 239        int                     immediate_present;
 240        __be32                  immediate_data;
 241};
 242
 243void ib_pack(const struct ib_field        *desc,
 244             int                           desc_len,
 245             void                         *structure,
 246             void                         *buf);
 247
 248void ib_unpack(const struct ib_field        *desc,
 249               int                           desc_len,
 250               void                         *buf,
 251               void                         *structure);
 252
 253void ib_ud_header_init(int                  payload_bytes,
 254                       int                  lrh_present,
 255                       int                  eth_present,
 256                       int                  vlan_present,
 257                       int                  grh_present,
 258                       int                  immediate_present,
 259                       struct ib_ud_header *header);
 260
 261int ib_ud_header_pack(struct ib_ud_header *header,
 262                      void                *buf);
 263
 264int ib_ud_header_unpack(void                *buf,
 265                        struct ib_ud_header *header);
 266
 267#endif /* IB_PACK_H */
 268
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