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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 */
32
33#ifndef IB_PACK_H
34#define IB_PACK_H
35
Roland Dreiera4d61e82005-08-25 13:40:04 -070036#include <rdma/ib_verbs.h>
Matan Barakdd5f03b2013-12-12 18:03:11 +020037#include <uapi/linux/if_ether.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39enum {
40 IB_LRH_BYTES = 8,
Eli Cohenff7f5aa2010-08-26 14:17:56 +000041 IB_ETH_BYTES = 14,
Eli Cohenaf7bd462010-08-26 17:18:59 +030042 IB_VLAN_BYTES = 4,
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 IB_GRH_BYTES = 40,
Moni Shoua25f40222015-12-23 14:56:56 +020044 IB_IP4_BYTES = 20,
45 IB_UDP_BYTES = 8,
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 IB_BTH_BYTES = 12,
47 IB_DETH_BYTES = 8
48};
49
50struct ib_field {
51 size_t struct_offset_bytes;
52 size_t struct_size_bytes;
53 int offset_words;
54 int offset_bits;
55 int size_bits;
56 char *field_name;
57};
58
59#define RESERVED \
60 .field_name = "reserved"
61
62/*
63 * This macro cleans up the definitions of constants for BTH opcodes.
64 * It is used to define constants such as IB_OPCODE_UD_SEND_ONLY,
65 * which becomes IB_OPCODE_UD + IB_OPCODE_SEND_ONLY, and this gives
66 * the correct value.
67 *
68 * In short, user code should use the constants defined using the
69 * macro rather than worrying about adding together other constants.
70*/
71#define IB_OPCODE(transport, op) \
72 IB_OPCODE_ ## transport ## _ ## op = \
73 IB_OPCODE_ ## transport + IB_OPCODE_ ## op
74
75enum {
76 /* transport types -- just used to define real constants */
77 IB_OPCODE_RC = 0x00,
78 IB_OPCODE_UC = 0x20,
79 IB_OPCODE_RD = 0x40,
80 IB_OPCODE_UD = 0x60,
Hal Rosenstock931cf9a2015-09-30 15:04:29 -040081 /* per IBTA 1.3 vol 1 Table 38, A10.3.2 */
Dennis Dalessandrod4ab3472015-07-30 15:17:32 -040082 IB_OPCODE_CNP = 0x80,
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
84 /* operations -- just used to define real constants */
85 IB_OPCODE_SEND_FIRST = 0x00,
86 IB_OPCODE_SEND_MIDDLE = 0x01,
87 IB_OPCODE_SEND_LAST = 0x02,
88 IB_OPCODE_SEND_LAST_WITH_IMMEDIATE = 0x03,
89 IB_OPCODE_SEND_ONLY = 0x04,
90 IB_OPCODE_SEND_ONLY_WITH_IMMEDIATE = 0x05,
91 IB_OPCODE_RDMA_WRITE_FIRST = 0x06,
92 IB_OPCODE_RDMA_WRITE_MIDDLE = 0x07,
93 IB_OPCODE_RDMA_WRITE_LAST = 0x08,
94 IB_OPCODE_RDMA_WRITE_LAST_WITH_IMMEDIATE = 0x09,
95 IB_OPCODE_RDMA_WRITE_ONLY = 0x0a,
96 IB_OPCODE_RDMA_WRITE_ONLY_WITH_IMMEDIATE = 0x0b,
97 IB_OPCODE_RDMA_READ_REQUEST = 0x0c,
98 IB_OPCODE_RDMA_READ_RESPONSE_FIRST = 0x0d,
99 IB_OPCODE_RDMA_READ_RESPONSE_MIDDLE = 0x0e,
100 IB_OPCODE_RDMA_READ_RESPONSE_LAST = 0x0f,
101 IB_OPCODE_RDMA_READ_RESPONSE_ONLY = 0x10,
102 IB_OPCODE_ACKNOWLEDGE = 0x11,
103 IB_OPCODE_ATOMIC_ACKNOWLEDGE = 0x12,
104 IB_OPCODE_COMPARE_SWAP = 0x13,
105 IB_OPCODE_FETCH_ADD = 0x14,
106
107 /* real constants follow -- see comment about above IB_OPCODE()
108 macro for more details */
109
110 /* RC */
111 IB_OPCODE(RC, SEND_FIRST),
112 IB_OPCODE(RC, SEND_MIDDLE),
113 IB_OPCODE(RC, SEND_LAST),
114 IB_OPCODE(RC, SEND_LAST_WITH_IMMEDIATE),
115 IB_OPCODE(RC, SEND_ONLY),
116 IB_OPCODE(RC, SEND_ONLY_WITH_IMMEDIATE),
117 IB_OPCODE(RC, RDMA_WRITE_FIRST),
118 IB_OPCODE(RC, RDMA_WRITE_MIDDLE),
119 IB_OPCODE(RC, RDMA_WRITE_LAST),
120 IB_OPCODE(RC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
121 IB_OPCODE(RC, RDMA_WRITE_ONLY),
122 IB_OPCODE(RC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
123 IB_OPCODE(RC, RDMA_READ_REQUEST),
124 IB_OPCODE(RC, RDMA_READ_RESPONSE_FIRST),
125 IB_OPCODE(RC, RDMA_READ_RESPONSE_MIDDLE),
126 IB_OPCODE(RC, RDMA_READ_RESPONSE_LAST),
127 IB_OPCODE(RC, RDMA_READ_RESPONSE_ONLY),
128 IB_OPCODE(RC, ACKNOWLEDGE),
129 IB_OPCODE(RC, ATOMIC_ACKNOWLEDGE),
130 IB_OPCODE(RC, COMPARE_SWAP),
131 IB_OPCODE(RC, FETCH_ADD),
132
133 /* UC */
134 IB_OPCODE(UC, SEND_FIRST),
135 IB_OPCODE(UC, SEND_MIDDLE),
136 IB_OPCODE(UC, SEND_LAST),
137 IB_OPCODE(UC, SEND_LAST_WITH_IMMEDIATE),
138 IB_OPCODE(UC, SEND_ONLY),
139 IB_OPCODE(UC, SEND_ONLY_WITH_IMMEDIATE),
140 IB_OPCODE(UC, RDMA_WRITE_FIRST),
141 IB_OPCODE(UC, RDMA_WRITE_MIDDLE),
142 IB_OPCODE(UC, RDMA_WRITE_LAST),
143 IB_OPCODE(UC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
144 IB_OPCODE(UC, RDMA_WRITE_ONLY),
145 IB_OPCODE(UC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
146
147 /* RD */
148 IB_OPCODE(RD, SEND_FIRST),
149 IB_OPCODE(RD, SEND_MIDDLE),
150 IB_OPCODE(RD, SEND_LAST),
151 IB_OPCODE(RD, SEND_LAST_WITH_IMMEDIATE),
152 IB_OPCODE(RD, SEND_ONLY),
153 IB_OPCODE(RD, SEND_ONLY_WITH_IMMEDIATE),
154 IB_OPCODE(RD, RDMA_WRITE_FIRST),
155 IB_OPCODE(RD, RDMA_WRITE_MIDDLE),
156 IB_OPCODE(RD, RDMA_WRITE_LAST),
157 IB_OPCODE(RD, RDMA_WRITE_LAST_WITH_IMMEDIATE),
158 IB_OPCODE(RD, RDMA_WRITE_ONLY),
159 IB_OPCODE(RD, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
160 IB_OPCODE(RD, RDMA_READ_REQUEST),
161 IB_OPCODE(RD, RDMA_READ_RESPONSE_FIRST),
162 IB_OPCODE(RD, RDMA_READ_RESPONSE_MIDDLE),
163 IB_OPCODE(RD, RDMA_READ_RESPONSE_LAST),
164 IB_OPCODE(RD, RDMA_READ_RESPONSE_ONLY),
165 IB_OPCODE(RD, ACKNOWLEDGE),
166 IB_OPCODE(RD, ATOMIC_ACKNOWLEDGE),
167 IB_OPCODE(RD, COMPARE_SWAP),
168 IB_OPCODE(RD, FETCH_ADD),
169
170 /* UD */
171 IB_OPCODE(UD, SEND_ONLY),
172 IB_OPCODE(UD, SEND_ONLY_WITH_IMMEDIATE)
173};
174
175enum {
176 IB_LNH_RAW = 0,
177 IB_LNH_IP = 1,
178 IB_LNH_IBA_LOCAL = 2,
179 IB_LNH_IBA_GLOBAL = 3
180};
181
182struct ib_unpacked_lrh {
183 u8 virtual_lane;
184 u8 link_version;
185 u8 service_level;
186 u8 link_next_header;
187 __be16 destination_lid;
188 __be16 packet_length;
189 __be16 source_lid;
190};
191
192struct ib_unpacked_grh {
193 u8 ip_version;
194 u8 traffic_class;
195 __be32 flow_label;
196 __be16 payload_length;
197 u8 next_header;
198 u8 hop_limit;
199 union ib_gid source_gid;
200 union ib_gid destination_gid;
201};
202
203struct ib_unpacked_bth {
204 u8 opcode;
205 u8 solicited_event;
206 u8 mig_req;
207 u8 pad_count;
208 u8 transport_header_version;
209 __be16 pkey;
210 __be32 destination_qpn;
211 u8 ack_req;
212 __be32 psn;
213};
214
215struct ib_unpacked_deth {
216 __be32 qkey;
217 __be32 source_qpn;
218};
219
Eli Cohenff7f5aa2010-08-26 14:17:56 +0000220struct ib_unpacked_eth {
221 u8 dmac_h[4];
222 u8 dmac_l[2];
223 u8 smac_h[2];
224 u8 smac_l[4];
225 __be16 type;
226};
227
Moni Shoua25f40222015-12-23 14:56:56 +0200228struct ib_unpacked_ip4 {
229 u8 ver;
230 u8 hdr_len;
231 u8 tos;
232 __be16 tot_len;
233 __be16 id;
234 __be16 frag_off;
235 u8 ttl;
236 u8 protocol;
Moni Shoua3ef967a2016-01-14 17:50:41 +0200237 __sum16 check;
Moni Shoua25f40222015-12-23 14:56:56 +0200238 __be32 saddr;
239 __be32 daddr;
240};
241
242struct ib_unpacked_udp {
243 __be16 sport;
244 __be16 dport;
245 __be16 length;
246 __be16 csum;
247};
248
Eli Cohenaf7bd462010-08-26 17:18:59 +0300249struct ib_unpacked_vlan {
250 __be16 tag;
251 __be16 type;
252};
253
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254struct ib_ud_header {
Eli Cohenff7f5aa2010-08-26 14:17:56 +0000255 int lrh_present;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 struct ib_unpacked_lrh lrh;
Eli Cohenff7f5aa2010-08-26 14:17:56 +0000257 int eth_present;
258 struct ib_unpacked_eth eth;
Eli Cohenaf7bd462010-08-26 17:18:59 +0300259 int vlan_present;
260 struct ib_unpacked_vlan vlan;
Eli Cohenff7f5aa2010-08-26 14:17:56 +0000261 int grh_present;
262 struct ib_unpacked_grh grh;
Moni Shoua25f40222015-12-23 14:56:56 +0200263 int ipv4_present;
264 struct ib_unpacked_ip4 ip4;
265 int udp_present;
266 struct ib_unpacked_udp udp;
Eli Cohenff7f5aa2010-08-26 14:17:56 +0000267 struct ib_unpacked_bth bth;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 struct ib_unpacked_deth deth;
Eli Cohenff7f5aa2010-08-26 14:17:56 +0000269 int immediate_present;
270 __be32 immediate_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271};
272
273void ib_pack(const struct ib_field *desc,
274 int desc_len,
275 void *structure,
276 void *buf);
277
278void ib_unpack(const struct ib_field *desc,
279 int desc_len,
280 void *buf,
281 void *structure);
282
Moni Shoua3ef967a2016-01-14 17:50:41 +0200283__sum16 ib_ud_ip4_csum(struct ib_ud_header *header);
Moni Shoua25f40222015-12-23 14:56:56 +0200284
285int ib_ud_header_init(int payload_bytes,
286 int lrh_present,
287 int eth_present,
288 int vlan_present,
289 int grh_present,
290 int ip_version,
291 int udp_present,
292 int immediate_present,
293 struct ib_ud_header *header);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
295int ib_ud_header_pack(struct ib_ud_header *header,
296 void *buf);
297
298int ib_ud_header_unpack(void *buf,
299 struct ib_ud_header *header);
300
301#endif /* IB_PACK_H */