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1/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
2/*
3 * Copyright (c) 2004 Topspin Corporation. All rights reserved.
4 */
5
6#ifndef IB_PACK_H
7#define IB_PACK_H
8
9#include <rdma/ib_verbs.h>
10#include <uapi/linux/if_ether.h>
11
12enum {
13 IB_LRH_BYTES = 8,
14 IB_ETH_BYTES = 14,
15 IB_VLAN_BYTES = 4,
16 IB_GRH_BYTES = 40,
17 IB_IP4_BYTES = 20,
18 IB_UDP_BYTES = 8,
19 IB_BTH_BYTES = 12,
20 IB_DETH_BYTES = 8,
21 IB_EXT_ATOMICETH_BYTES = 28,
22 IB_EXT_XRC_BYTES = 4,
23 IB_ICRC_BYTES = 4
24};
25
26struct ib_field {
27 size_t struct_offset_bytes;
28 size_t struct_size_bytes;
29 int offset_words;
30 int offset_bits;
31 int size_bits;
32 char *field_name;
33};
34
35#define RESERVED \
36 .field_name = "reserved"
37
38/*
39 * This macro cleans up the definitions of constants for BTH opcodes.
40 * It is used to define constants such as IB_OPCODE_UD_SEND_ONLY,
41 * which becomes IB_OPCODE_UD + IB_OPCODE_SEND_ONLY, and this gives
42 * the correct value.
43 *
44 * In short, user code should use the constants defined using the
45 * macro rather than worrying about adding together other constants.
46*/
47#define IB_OPCODE(transport, op) \
48 IB_OPCODE_ ## transport ## _ ## op = \
49 IB_OPCODE_ ## transport + IB_OPCODE_ ## op
50
51enum {
52 /* transport types -- just used to define real constants */
53 IB_OPCODE_RC = 0x00,
54 IB_OPCODE_UC = 0x20,
55 IB_OPCODE_RD = 0x40,
56 IB_OPCODE_UD = 0x60,
57 /* per IBTA 1.3 vol 1 Table 38, A10.3.2 */
58 IB_OPCODE_CNP = 0x80,
59 /* Manufacturer specific */
60 IB_OPCODE_MSP = 0xe0,
61
62 /* operations -- just used to define real constants */
63 IB_OPCODE_SEND_FIRST = 0x00,
64 IB_OPCODE_SEND_MIDDLE = 0x01,
65 IB_OPCODE_SEND_LAST = 0x02,
66 IB_OPCODE_SEND_LAST_WITH_IMMEDIATE = 0x03,
67 IB_OPCODE_SEND_ONLY = 0x04,
68 IB_OPCODE_SEND_ONLY_WITH_IMMEDIATE = 0x05,
69 IB_OPCODE_RDMA_WRITE_FIRST = 0x06,
70 IB_OPCODE_RDMA_WRITE_MIDDLE = 0x07,
71 IB_OPCODE_RDMA_WRITE_LAST = 0x08,
72 IB_OPCODE_RDMA_WRITE_LAST_WITH_IMMEDIATE = 0x09,
73 IB_OPCODE_RDMA_WRITE_ONLY = 0x0a,
74 IB_OPCODE_RDMA_WRITE_ONLY_WITH_IMMEDIATE = 0x0b,
75 IB_OPCODE_RDMA_READ_REQUEST = 0x0c,
76 IB_OPCODE_RDMA_READ_RESPONSE_FIRST = 0x0d,
77 IB_OPCODE_RDMA_READ_RESPONSE_MIDDLE = 0x0e,
78 IB_OPCODE_RDMA_READ_RESPONSE_LAST = 0x0f,
79 IB_OPCODE_RDMA_READ_RESPONSE_ONLY = 0x10,
80 IB_OPCODE_ACKNOWLEDGE = 0x11,
81 IB_OPCODE_ATOMIC_ACKNOWLEDGE = 0x12,
82 IB_OPCODE_COMPARE_SWAP = 0x13,
83 IB_OPCODE_FETCH_ADD = 0x14,
84 /* opcode 0x15 is reserved */
85 IB_OPCODE_SEND_LAST_WITH_INVALIDATE = 0x16,
86 IB_OPCODE_SEND_ONLY_WITH_INVALIDATE = 0x17,
87 IB_OPCODE_FLUSH = 0x1C,
88 IB_OPCODE_ATOMIC_WRITE = 0x1D,
89
90 /* real constants follow -- see comment about above IB_OPCODE()
91 macro for more details */
92
93 /* RC */
94 IB_OPCODE(RC, SEND_FIRST),
95 IB_OPCODE(RC, SEND_MIDDLE),
96 IB_OPCODE(RC, SEND_LAST),
97 IB_OPCODE(RC, SEND_LAST_WITH_IMMEDIATE),
98 IB_OPCODE(RC, SEND_ONLY),
99 IB_OPCODE(RC, SEND_ONLY_WITH_IMMEDIATE),
100 IB_OPCODE(RC, RDMA_WRITE_FIRST),
101 IB_OPCODE(RC, RDMA_WRITE_MIDDLE),
102 IB_OPCODE(RC, RDMA_WRITE_LAST),
103 IB_OPCODE(RC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
104 IB_OPCODE(RC, RDMA_WRITE_ONLY),
105 IB_OPCODE(RC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
106 IB_OPCODE(RC, RDMA_READ_REQUEST),
107 IB_OPCODE(RC, RDMA_READ_RESPONSE_FIRST),
108 IB_OPCODE(RC, RDMA_READ_RESPONSE_MIDDLE),
109 IB_OPCODE(RC, RDMA_READ_RESPONSE_LAST),
110 IB_OPCODE(RC, RDMA_READ_RESPONSE_ONLY),
111 IB_OPCODE(RC, ACKNOWLEDGE),
112 IB_OPCODE(RC, ATOMIC_ACKNOWLEDGE),
113 IB_OPCODE(RC, COMPARE_SWAP),
114 IB_OPCODE(RC, FETCH_ADD),
115 IB_OPCODE(RC, SEND_LAST_WITH_INVALIDATE),
116 IB_OPCODE(RC, SEND_ONLY_WITH_INVALIDATE),
117 IB_OPCODE(RC, FLUSH),
118 IB_OPCODE(RC, ATOMIC_WRITE),
119
120 /* UC */
121 IB_OPCODE(UC, SEND_FIRST),
122 IB_OPCODE(UC, SEND_MIDDLE),
123 IB_OPCODE(UC, SEND_LAST),
124 IB_OPCODE(UC, SEND_LAST_WITH_IMMEDIATE),
125 IB_OPCODE(UC, SEND_ONLY),
126 IB_OPCODE(UC, SEND_ONLY_WITH_IMMEDIATE),
127 IB_OPCODE(UC, RDMA_WRITE_FIRST),
128 IB_OPCODE(UC, RDMA_WRITE_MIDDLE),
129 IB_OPCODE(UC, RDMA_WRITE_LAST),
130 IB_OPCODE(UC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
131 IB_OPCODE(UC, RDMA_WRITE_ONLY),
132 IB_OPCODE(UC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
133
134 /* RD */
135 IB_OPCODE(RD, SEND_FIRST),
136 IB_OPCODE(RD, SEND_MIDDLE),
137 IB_OPCODE(RD, SEND_LAST),
138 IB_OPCODE(RD, SEND_LAST_WITH_IMMEDIATE),
139 IB_OPCODE(RD, SEND_ONLY),
140 IB_OPCODE(RD, SEND_ONLY_WITH_IMMEDIATE),
141 IB_OPCODE(RD, RDMA_WRITE_FIRST),
142 IB_OPCODE(RD, RDMA_WRITE_MIDDLE),
143 IB_OPCODE(RD, RDMA_WRITE_LAST),
144 IB_OPCODE(RD, RDMA_WRITE_LAST_WITH_IMMEDIATE),
145 IB_OPCODE(RD, RDMA_WRITE_ONLY),
146 IB_OPCODE(RD, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
147 IB_OPCODE(RD, RDMA_READ_REQUEST),
148 IB_OPCODE(RD, RDMA_READ_RESPONSE_FIRST),
149 IB_OPCODE(RD, RDMA_READ_RESPONSE_MIDDLE),
150 IB_OPCODE(RD, RDMA_READ_RESPONSE_LAST),
151 IB_OPCODE(RD, RDMA_READ_RESPONSE_ONLY),
152 IB_OPCODE(RD, ACKNOWLEDGE),
153 IB_OPCODE(RD, ATOMIC_ACKNOWLEDGE),
154 IB_OPCODE(RD, COMPARE_SWAP),
155 IB_OPCODE(RD, FETCH_ADD),
156 IB_OPCODE(RD, FLUSH),
157
158 /* UD */
159 IB_OPCODE(UD, SEND_ONLY),
160 IB_OPCODE(UD, SEND_ONLY_WITH_IMMEDIATE)
161};
162
163enum {
164 IB_LNH_RAW = 0,
165 IB_LNH_IP = 1,
166 IB_LNH_IBA_LOCAL = 2,
167 IB_LNH_IBA_GLOBAL = 3
168};
169
170struct ib_unpacked_lrh {
171 u8 virtual_lane;
172 u8 link_version;
173 u8 service_level;
174 u8 link_next_header;
175 __be16 destination_lid;
176 __be16 packet_length;
177 __be16 source_lid;
178};
179
180struct ib_unpacked_grh {
181 u8 ip_version;
182 u8 traffic_class;
183 __be32 flow_label;
184 __be16 payload_length;
185 u8 next_header;
186 u8 hop_limit;
187 union ib_gid source_gid;
188 union ib_gid destination_gid;
189};
190
191struct ib_unpacked_bth {
192 u8 opcode;
193 u8 solicited_event;
194 u8 mig_req;
195 u8 pad_count;
196 u8 transport_header_version;
197 __be16 pkey;
198 __be32 destination_qpn;
199 u8 ack_req;
200 __be32 psn;
201};
202
203struct ib_unpacked_deth {
204 __be32 qkey;
205 __be32 source_qpn;
206};
207
208struct ib_unpacked_eth {
209 u8 dmac_h[4];
210 u8 dmac_l[2];
211 u8 smac_h[2];
212 u8 smac_l[4];
213 __be16 type;
214};
215
216struct ib_unpacked_ip4 {
217 u8 ver;
218 u8 hdr_len;
219 u8 tos;
220 __be16 tot_len;
221 __be16 id;
222 __be16 frag_off;
223 u8 ttl;
224 u8 protocol;
225 __sum16 check;
226 __be32 saddr;
227 __be32 daddr;
228};
229
230struct ib_unpacked_udp {
231 __be16 sport;
232 __be16 dport;
233 __be16 length;
234 __be16 csum;
235};
236
237struct ib_unpacked_vlan {
238 __be16 tag;
239 __be16 type;
240};
241
242struct ib_ud_header {
243 int lrh_present;
244 struct ib_unpacked_lrh lrh;
245 int eth_present;
246 struct ib_unpacked_eth eth;
247 int vlan_present;
248 struct ib_unpacked_vlan vlan;
249 int grh_present;
250 struct ib_unpacked_grh grh;
251 int ipv4_present;
252 struct ib_unpacked_ip4 ip4;
253 int udp_present;
254 struct ib_unpacked_udp udp;
255 struct ib_unpacked_bth bth;
256 struct ib_unpacked_deth deth;
257 int immediate_present;
258 __be32 immediate_data;
259};
260
261void ib_pack(const struct ib_field *desc,
262 int desc_len,
263 void *structure,
264 void *buf);
265
266void ib_unpack(const struct ib_field *desc,
267 int desc_len,
268 void *buf,
269 void *structure);
270
271__sum16 ib_ud_ip4_csum(struct ib_ud_header *header);
272
273int ib_ud_header_init(int payload_bytes,
274 int lrh_present,
275 int eth_present,
276 int vlan_present,
277 int grh_present,
278 int ip_version,
279 int udp_present,
280 int immediate_present,
281 struct ib_ud_header *header);
282
283int ib_ud_header_pack(struct ib_ud_header *header,
284 void *buf);
285
286#endif /* IB_PACK_H */