Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/ofed/include/rdma/ib_pack.h
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0 3 * 4 * Copyright (c) 2004 Topspin Corporation. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 * 34 * $FreeBSD$ 35 */ 36 37 #ifndef IB_PACK_H 38 #define IB_PACK_H 39 40 #include <rdma/ib_verbs.h> 41 42 enum { 43 IB_LRH_BYTES = 8, 44 IB_ETH_BYTES = 14, 45 IB_VLAN_BYTES = 4, 46 IB_GRH_BYTES = 40, 47 IB_IP4_BYTES = 20, 48 IB_UDP_BYTES = 8, 49 IB_BTH_BYTES = 12, 50 IB_DETH_BYTES = 8 51 }; 52 53 struct ib_field { 54 size_t struct_offset_bytes; 55 size_t struct_size_bytes; 56 int offset_words; 57 int offset_bits; 58 int size_bits; 59 char *field_name; 60 }; 61 62 #define RESERVED \ 63 .field_name = "reserved" 64 65 /* 66 * This macro cleans up the definitions of constants for BTH opcodes. 67 * It is used to define constants such as IB_OPCODE_UD_SEND_ONLY, 68 * which becomes IB_OPCODE_UD + IB_OPCODE_SEND_ONLY, and this gives 69 * the correct value. 70 * 71 * In short, user code should use the constants defined using the 72 * macro rather than worrying about adding together other constants. 73 */ 74 #define IB_OPCODE(transport, op) \ 75 IB_OPCODE_ ## transport ## _ ## op = \ 76 IB_OPCODE_ ## transport + IB_OPCODE_ ## op 77 78 enum { 79 /* transport types -- just used to define real constants */ 80 IB_OPCODE_RC = 0x00, 81 IB_OPCODE_UC = 0x20, 82 IB_OPCODE_RD = 0x40, 83 IB_OPCODE_UD = 0x60, 84 /* per IBTA 1.3 vol 1 Table 38, A10.3.2 */ 85 IB_OPCODE_CNP = 0x80, 86 87 /* operations -- just used to define real constants */ 88 IB_OPCODE_SEND_FIRST = 0x00, 89 IB_OPCODE_SEND_MIDDLE = 0x01, 90 IB_OPCODE_SEND_LAST = 0x02, 91 IB_OPCODE_SEND_LAST_WITH_IMMEDIATE = 0x03, 92 IB_OPCODE_SEND_ONLY = 0x04, 93 IB_OPCODE_SEND_ONLY_WITH_IMMEDIATE = 0x05, 94 IB_OPCODE_RDMA_WRITE_FIRST = 0x06, 95 IB_OPCODE_RDMA_WRITE_MIDDLE = 0x07, 96 IB_OPCODE_RDMA_WRITE_LAST = 0x08, 97 IB_OPCODE_RDMA_WRITE_LAST_WITH_IMMEDIATE = 0x09, 98 IB_OPCODE_RDMA_WRITE_ONLY = 0x0a, 99 IB_OPCODE_RDMA_WRITE_ONLY_WITH_IMMEDIATE = 0x0b, 100 IB_OPCODE_RDMA_READ_REQUEST = 0x0c, 101 IB_OPCODE_RDMA_READ_RESPONSE_FIRST = 0x0d, 102 IB_OPCODE_RDMA_READ_RESPONSE_MIDDLE = 0x0e, 103 IB_OPCODE_RDMA_READ_RESPONSE_LAST = 0x0f, 104 IB_OPCODE_RDMA_READ_RESPONSE_ONLY = 0x10, 105 IB_OPCODE_ACKNOWLEDGE = 0x11, 106 IB_OPCODE_ATOMIC_ACKNOWLEDGE = 0x12, 107 IB_OPCODE_COMPARE_SWAP = 0x13, 108 IB_OPCODE_FETCH_ADD = 0x14, 109 /* opcode 0x15 is reserved */ 110 IB_OPCODE_SEND_LAST_WITH_INVALIDATE = 0x16, 111 IB_OPCODE_SEND_ONLY_WITH_INVALIDATE = 0x17, 112 113 /* real constants follow -- see comment about above IB_OPCODE() 114 macro for more details */ 115 116 /* RC */ 117 IB_OPCODE(RC, SEND_FIRST), 118 IB_OPCODE(RC, SEND_MIDDLE), 119 IB_OPCODE(RC, SEND_LAST), 120 IB_OPCODE(RC, SEND_LAST_WITH_IMMEDIATE), 121 IB_OPCODE(RC, SEND_ONLY), 122 IB_OPCODE(RC, SEND_ONLY_WITH_IMMEDIATE), 123 IB_OPCODE(RC, RDMA_WRITE_FIRST), 124 IB_OPCODE(RC, RDMA_WRITE_MIDDLE), 125 IB_OPCODE(RC, RDMA_WRITE_LAST), 126 IB_OPCODE(RC, RDMA_WRITE_LAST_WITH_IMMEDIATE), 127 IB_OPCODE(RC, RDMA_WRITE_ONLY), 128 IB_OPCODE(RC, RDMA_WRITE_ONLY_WITH_IMMEDIATE), 129 IB_OPCODE(RC, RDMA_READ_REQUEST), 130 IB_OPCODE(RC, RDMA_READ_RESPONSE_FIRST), 131 IB_OPCODE(RC, RDMA_READ_RESPONSE_MIDDLE), 132 IB_OPCODE(RC, RDMA_READ_RESPONSE_LAST), 133 IB_OPCODE(RC, RDMA_READ_RESPONSE_ONLY), 134 IB_OPCODE(RC, ACKNOWLEDGE), 135 IB_OPCODE(RC, ATOMIC_ACKNOWLEDGE), 136 IB_OPCODE(RC, COMPARE_SWAP), 137 IB_OPCODE(RC, FETCH_ADD), 138 IB_OPCODE(RC, SEND_LAST_WITH_INVALIDATE), 139 IB_OPCODE(RC, SEND_ONLY_WITH_INVALIDATE), 140 141 /* UC */ 142 IB_OPCODE(UC, SEND_FIRST), 143 IB_OPCODE(UC, SEND_MIDDLE), 144 IB_OPCODE(UC, SEND_LAST), 145 IB_OPCODE(UC, SEND_LAST_WITH_IMMEDIATE), 146 IB_OPCODE(UC, SEND_ONLY), 147 IB_OPCODE(UC, SEND_ONLY_WITH_IMMEDIATE), 148 IB_OPCODE(UC, RDMA_WRITE_FIRST), 149 IB_OPCODE(UC, RDMA_WRITE_MIDDLE), 150 IB_OPCODE(UC, RDMA_WRITE_LAST), 151 IB_OPCODE(UC, RDMA_WRITE_LAST_WITH_IMMEDIATE), 152 IB_OPCODE(UC, RDMA_WRITE_ONLY), 153 IB_OPCODE(UC, RDMA_WRITE_ONLY_WITH_IMMEDIATE), 154 155 /* RD */ 156 IB_OPCODE(RD, SEND_FIRST), 157 IB_OPCODE(RD, SEND_MIDDLE), 158 IB_OPCODE(RD, SEND_LAST), 159 IB_OPCODE(RD, SEND_LAST_WITH_IMMEDIATE), 160 IB_OPCODE(RD, SEND_ONLY), 161 IB_OPCODE(RD, SEND_ONLY_WITH_IMMEDIATE), 162 IB_OPCODE(RD, RDMA_WRITE_FIRST), 163 IB_OPCODE(RD, RDMA_WRITE_MIDDLE), 164 IB_OPCODE(RD, RDMA_WRITE_LAST), 165 IB_OPCODE(RD, RDMA_WRITE_LAST_WITH_IMMEDIATE), 166 IB_OPCODE(RD, RDMA_WRITE_ONLY), 167 IB_OPCODE(RD, RDMA_WRITE_ONLY_WITH_IMMEDIATE), 168 IB_OPCODE(RD, RDMA_READ_REQUEST), 169 IB_OPCODE(RD, RDMA_READ_RESPONSE_FIRST), 170 IB_OPCODE(RD, RDMA_READ_RESPONSE_MIDDLE), 171 IB_OPCODE(RD, RDMA_READ_RESPONSE_LAST), 172 IB_OPCODE(RD, RDMA_READ_RESPONSE_ONLY), 173 IB_OPCODE(RD, ACKNOWLEDGE), 174 IB_OPCODE(RD, ATOMIC_ACKNOWLEDGE), 175 IB_OPCODE(RD, COMPARE_SWAP), 176 IB_OPCODE(RD, FETCH_ADD), 177 178 /* UD */ 179 IB_OPCODE(UD, SEND_ONLY), 180 IB_OPCODE(UD, SEND_ONLY_WITH_IMMEDIATE) 181 }; 182 183 enum { 184 IB_LNH_RAW = 0, 185 IB_LNH_IP = 1, 186 IB_LNH_IBA_LOCAL = 2, 187 IB_LNH_IBA_GLOBAL = 3 188 }; 189 190 struct ib_unpacked_lrh { 191 u8 virtual_lane; 192 u8 link_version; 193 u8 service_level; 194 u8 link_next_header; 195 __be16 destination_lid; 196 __be16 packet_length; 197 __be16 source_lid; 198 }; 199 200 struct ib_unpacked_grh { 201 u8 ip_version; 202 u8 traffic_class; 203 __be32 flow_label; 204 __be16 payload_length; 205 u8 next_header; 206 u8 hop_limit; 207 union ib_gid source_gid; 208 union ib_gid destination_gid; 209 }; 210 211 struct ib_unpacked_bth { 212 u8 opcode; 213 u8 solicited_event; 214 u8 mig_req; 215 u8 pad_count; 216 u8 transport_header_version; 217 __be16 pkey; 218 __be32 destination_qpn; 219 u8 ack_req; 220 __be32 psn; 221 }; 222 223 struct ib_unpacked_deth { 224 __be32 qkey; 225 __be32 source_qpn; 226 }; 227 228 struct ib_unpacked_eth { 229 u8 dmac_h[4]; 230 u8 dmac_l[2]; 231 u8 smac_h[2]; 232 u8 smac_l[4]; 233 __be16 type; 234 }; 235 236 struct ib_unpacked_ip4 { 237 u8 ver; 238 u8 hdr_len; 239 u8 tos; 240 __be16 tot_len; 241 __be16 id; 242 __be16 frag_off; 243 u8 ttl; 244 u8 protocol; 245 __sum16 check; 246 __be32 saddr; 247 __be32 daddr; 248 }; 249 250 struct ib_unpacked_udp { 251 __be16 sport; 252 __be16 dport; 253 __be16 length; 254 __be16 csum; 255 }; 256 257 struct ib_unpacked_vlan { 258 __be16 tag; 259 __be16 type; 260 }; 261 262 struct ib_ud_header { 263 int lrh_present; 264 struct ib_unpacked_lrh lrh; 265 int eth_present; 266 struct ib_unpacked_eth eth; 267 int vlan_present; 268 struct ib_unpacked_vlan vlan; 269 int grh_present; 270 struct ib_unpacked_grh grh; 271 int ipv4_present; 272 struct ib_unpacked_ip4 ip4; 273 int udp_present; 274 struct ib_unpacked_udp udp; 275 struct ib_unpacked_bth bth; 276 struct ib_unpacked_deth deth; 277 int immediate_present; 278 __be32 immediate_data; 279 }; 280 281 void ib_pack(const struct ib_field *desc, 282 int desc_len, 283 void *structure, 284 void *buf); 285 286 void ib_unpack(const struct ib_field *desc, 287 int desc_len, 288 void *buf, 289 void *structure); 290 291 __sum16 ib_ud_ip4_csum(struct ib_ud_header *header); 292 293 int ib_ud_header_init(int payload_bytes, 294 int lrh_present, 295 int eth_present, 296 int vlan_present, 297 int grh_present, 298 int ip_version, 299 int udp_present, 300 int immediate_present, 301 struct ib_ud_header *header); 302 303 int ib_ud_header_pack(struct ib_ud_header *header, 304 void *buf); 305 306 int ib_ud_header_unpack(void *buf, 307 struct ib_ud_header *header); 308 309 #endif /* IB_PACK_H */
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