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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 * $Id: ib_pack.h 1349 2004-12-16 21:09:43Z roland $
33 */
34
35#ifndef IB_PACK_H
36#define IB_PACK_H
37
38#include <ib_verbs.h>
39
40enum {
41 IB_LRH_BYTES = 8,
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_ud_header {
216 struct ib_unpacked_lrh lrh;
217 int grh_present;
218 struct ib_unpacked_grh grh;
219 struct ib_unpacked_bth bth;
220 struct ib_unpacked_deth deth;
221 int immediate_present;
222 __be32 immediate_data;
223};
224
225void ib_pack(const struct ib_field *desc,
226 int desc_len,
227 void *structure,
228 void *buf);
229
230void ib_unpack(const struct ib_field *desc,
231 int desc_len,
232 void *buf,
233 void *structure);
234
235void ib_ud_header_init(int payload_bytes,
236 int grh_present,
237 struct ib_ud_header *header);
238
239int ib_ud_header_pack(struct ib_ud_header *header,
240 void *buf);
241
242int ib_ud_header_unpack(void *buf,
243 struct ib_ud_header *header);
244
245#endif /* IB_PACK_H */
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