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 #include <uapi/linux/if_ether.h> 38 39 enum { 40 IB_LRH_BYTES = 8, 41 IB_ETH_BYTES = 14, 42 IB_VLAN_BYTES = 4, 43 IB_GRH_BYTES = 40, 44 IB_BTH_BYTES = 12, 45 IB_DETH_BYTES = 8 46 }; 47 48 struct ib_field { 49 size_t struct_offset_bytes; 50 size_t struct_size_bytes; 51 int offset_words; 52 int offset_bits; 53 int size_bits; 54 char *field_name; 55 }; 56 57 #define RESERVED \ 58 .field_name = "reserved" 59 60 /* 61 * This macro cleans up the definitions of constants for BTH opcodes. 62 * It is used to define constants such as IB_OPCODE_UD_SEND_ONLY, 63 * which becomes IB_OPCODE_UD + IB_OPCODE_SEND_ONLY, and this gives 64 * the correct value. 65 * 66 * In short, user code should use the constants defined using the 67 * macro rather than worrying about adding together other constants. 68 */ 69 #define IB_OPCODE(transport, op) \ 70 IB_OPCODE_ ## transport ## _ ## op = \ 71 IB_OPCODE_ ## transport + IB_OPCODE_ ## op 72 73 enum { 74 /* transport types -- just used to define real constants */ 75 IB_OPCODE_RC = 0x00, 76 IB_OPCODE_UC = 0x20, 77 IB_OPCODE_RD = 0x40, 78 IB_OPCODE_UD = 0x60, 79 /* per IBTA 3.1 Table 38, A10.3.2 */ 80 IB_OPCODE_CNP = 0x80, 81 82 /* operations -- just used to define real constants */ 83 IB_OPCODE_SEND_FIRST = 0x00, 84 IB_OPCODE_SEND_MIDDLE = 0x01, 85 IB_OPCODE_SEND_LAST = 0x02, 86 IB_OPCODE_SEND_LAST_WITH_IMMEDIATE = 0x03, 87 IB_OPCODE_SEND_ONLY = 0x04, 88 IB_OPCODE_SEND_ONLY_WITH_IMMEDIATE = 0x05, 89 IB_OPCODE_RDMA_WRITE_FIRST = 0x06, 90 IB_OPCODE_RDMA_WRITE_MIDDLE = 0x07, 91 IB_OPCODE_RDMA_WRITE_LAST = 0x08, 92 IB_OPCODE_RDMA_WRITE_LAST_WITH_IMMEDIATE = 0x09, 93 IB_OPCODE_RDMA_WRITE_ONLY = 0x0a, 94 IB_OPCODE_RDMA_WRITE_ONLY_WITH_IMMEDIATE = 0x0b, 95 IB_OPCODE_RDMA_READ_REQUEST = 0x0c, 96 IB_OPCODE_RDMA_READ_RESPONSE_FIRST = 0x0d, 97 IB_OPCODE_RDMA_READ_RESPONSE_MIDDLE = 0x0e, 98 IB_OPCODE_RDMA_READ_RESPONSE_LAST = 0x0f, 99 IB_OPCODE_RDMA_READ_RESPONSE_ONLY = 0x10, 100 IB_OPCODE_ACKNOWLEDGE = 0x11, 101 IB_OPCODE_ATOMIC_ACKNOWLEDGE = 0x12, 102 IB_OPCODE_COMPARE_SWAP = 0x13, 103 IB_OPCODE_FETCH_ADD = 0x14, 104 105 /* real constants follow -- see comment about above IB_OPCODE() 106 macro for more details */ 107 108 /* RC */ 109 IB_OPCODE(RC, SEND_FIRST), 110 IB_OPCODE(RC, SEND_MIDDLE), 111 IB_OPCODE(RC, SEND_LAST), 112 IB_OPCODE(RC, SEND_LAST_WITH_IMMEDIATE), 113 IB_OPCODE(RC, SEND_ONLY), 114 IB_OPCODE(RC, SEND_ONLY_WITH_IMMEDIATE), 115 IB_OPCODE(RC, RDMA_WRITE_FIRST), 116 IB_OPCODE(RC, RDMA_WRITE_MIDDLE), 117 IB_OPCODE(RC, RDMA_WRITE_LAST), 118 IB_OPCODE(RC, RDMA_WRITE_LAST_WITH_IMMEDIATE), 119 IB_OPCODE(RC, RDMA_WRITE_ONLY), 120 IB_OPCODE(RC, RDMA_WRITE_ONLY_WITH_IMMEDIATE), 121 IB_OPCODE(RC, RDMA_READ_REQUEST), 122 IB_OPCODE(RC, RDMA_READ_RESPONSE_FIRST), 123 IB_OPCODE(RC, RDMA_READ_RESPONSE_MIDDLE), 124 IB_OPCODE(RC, RDMA_READ_RESPONSE_LAST), 125 IB_OPCODE(RC, RDMA_READ_RESPONSE_ONLY), 126 IB_OPCODE(RC, ACKNOWLEDGE), 127 IB_OPCODE(RC, ATOMIC_ACKNOWLEDGE), 128 IB_OPCODE(RC, COMPARE_SWAP), 129 IB_OPCODE(RC, FETCH_ADD), 130 131 /* UC */ 132 IB_OPCODE(UC, SEND_FIRST), 133 IB_OPCODE(UC, SEND_MIDDLE), 134 IB_OPCODE(UC, SEND_LAST), 135 IB_OPCODE(UC, SEND_LAST_WITH_IMMEDIATE), 136 IB_OPCODE(UC, SEND_ONLY), 137 IB_OPCODE(UC, SEND_ONLY_WITH_IMMEDIATE), 138 IB_OPCODE(UC, RDMA_WRITE_FIRST), 139 IB_OPCODE(UC, RDMA_WRITE_MIDDLE), 140 IB_OPCODE(UC, RDMA_WRITE_LAST), 141 IB_OPCODE(UC, RDMA_WRITE_LAST_WITH_IMMEDIATE), 142 IB_OPCODE(UC, RDMA_WRITE_ONLY), 143 IB_OPCODE(UC, RDMA_WRITE_ONLY_WITH_IMMEDIATE), 144 145 /* RD */ 146 IB_OPCODE(RD, SEND_FIRST), 147 IB_OPCODE(RD, SEND_MIDDLE), 148 IB_OPCODE(RD, SEND_LAST), 149 IB_OPCODE(RD, SEND_LAST_WITH_IMMEDIATE), 150 IB_OPCODE(RD, SEND_ONLY), 151 IB_OPCODE(RD, SEND_ONLY_WITH_IMMEDIATE), 152 IB_OPCODE(RD, RDMA_WRITE_FIRST), 153 IB_OPCODE(RD, RDMA_WRITE_MIDDLE), 154 IB_OPCODE(RD, RDMA_WRITE_LAST), 155 IB_OPCODE(RD, RDMA_WRITE_LAST_WITH_IMMEDIATE), 156 IB_OPCODE(RD, RDMA_WRITE_ONLY), 157 IB_OPCODE(RD, RDMA_WRITE_ONLY_WITH_IMMEDIATE), 158 IB_OPCODE(RD, RDMA_READ_REQUEST), 159 IB_OPCODE(RD, RDMA_READ_RESPONSE_FIRST), 160 IB_OPCODE(RD, RDMA_READ_RESPONSE_MIDDLE), 161 IB_OPCODE(RD, RDMA_READ_RESPONSE_LAST), 162 IB_OPCODE(RD, RDMA_READ_RESPONSE_ONLY), 163 IB_OPCODE(RD, ACKNOWLEDGE), 164 IB_OPCODE(RD, ATOMIC_ACKNOWLEDGE), 165 IB_OPCODE(RD, COMPARE_SWAP), 166 IB_OPCODE(RD, FETCH_ADD), 167 168 /* UD */ 169 IB_OPCODE(UD, SEND_ONLY), 170 IB_OPCODE(UD, SEND_ONLY_WITH_IMMEDIATE) 171 }; 172 173 enum { 174 IB_LNH_RAW = 0, 175 IB_LNH_IP = 1, 176 IB_LNH_IBA_LOCAL = 2, 177 IB_LNH_IBA_GLOBAL = 3 178 }; 179 180 struct ib_unpacked_lrh { 181 u8 virtual_lane; 182 u8 link_version; 183 u8 service_level; 184 u8 link_next_header; 185 __be16 destination_lid; 186 __be16 packet_length; 187 __be16 source_lid; 188 }; 189 190 struct ib_unpacked_grh { 191 u8 ip_version; 192 u8 traffic_class; 193 __be32 flow_label; 194 __be16 payload_length; 195 u8 next_header; 196 u8 hop_limit; 197 union ib_gid source_gid; 198 union ib_gid destination_gid; 199 }; 200 201 struct ib_unpacked_bth { 202 u8 opcode; 203 u8 solicited_event; 204 u8 mig_req; 205 u8 pad_count; 206 u8 transport_header_version; 207 __be16 pkey; 208 __be32 destination_qpn; 209 u8 ack_req; 210 __be32 psn; 211 }; 212 213 struct ib_unpacked_deth { 214 __be32 qkey; 215 __be32 source_qpn; 216 }; 217 218 struct ib_unpacked_eth { 219 u8 dmac_h[4]; 220 u8 dmac_l[2]; 221 u8 smac_h[2]; 222 u8 smac_l[4]; 223 __be16 type; 224 }; 225 226 struct ib_unpacked_vlan { 227 __be16 tag; 228 __be16 type; 229 }; 230 231 struct ib_ud_header { 232 int lrh_present; 233 struct ib_unpacked_lrh lrh; 234 int eth_present; 235 struct ib_unpacked_eth eth; 236 int vlan_present; 237 struct ib_unpacked_vlan vlan; 238 int grh_present; 239 struct ib_unpacked_grh grh; 240 struct ib_unpacked_bth bth; 241 struct ib_unpacked_deth deth; 242 int immediate_present; 243 __be32 immediate_data; 244 }; 245 246 void ib_pack(const struct ib_field *desc, 247 int desc_len, 248 void *structure, 249 void *buf); 250 251 void ib_unpack(const struct ib_field *desc, 252 int desc_len, 253 void *buf, 254 void *structure); 255 256 void ib_ud_header_init(int payload_bytes, 257 int lrh_present, 258 int eth_present, 259 int vlan_present, 260 int grh_present, 261 int immediate_present, 262 struct ib_ud_header *header); 263 264 int ib_ud_header_pack(struct ib_ud_header *header, 265 void *buf); 266 267 int ib_ud_header_unpack(void *buf, 268 struct ib_ud_header *header); 269 270 #endif /* IB_PACK_H */ 271