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TOMOYO Linux Cross Reference
Linux/include/rdma/ib_pack.h

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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 
 12 enum {
 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 
 26 struct 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 
 51 enum {
 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 
 88         /* real constants follow -- see comment about above IB_OPCODE()
 89            macro for more details */
 90 
 91         /* RC */
 92         IB_OPCODE(RC, SEND_FIRST),
 93         IB_OPCODE(RC, SEND_MIDDLE),
 94         IB_OPCODE(RC, SEND_LAST),
 95         IB_OPCODE(RC, SEND_LAST_WITH_IMMEDIATE),
 96         IB_OPCODE(RC, SEND_ONLY),
 97         IB_OPCODE(RC, SEND_ONLY_WITH_IMMEDIATE),
 98         IB_OPCODE(RC, RDMA_WRITE_FIRST),
 99         IB_OPCODE(RC, RDMA_WRITE_MIDDLE),
100         IB_OPCODE(RC, RDMA_WRITE_LAST),
101         IB_OPCODE(RC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
102         IB_OPCODE(RC, RDMA_WRITE_ONLY),
103         IB_OPCODE(RC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
104         IB_OPCODE(RC, RDMA_READ_REQUEST),
105         IB_OPCODE(RC, RDMA_READ_RESPONSE_FIRST),
106         IB_OPCODE(RC, RDMA_READ_RESPONSE_MIDDLE),
107         IB_OPCODE(RC, RDMA_READ_RESPONSE_LAST),
108         IB_OPCODE(RC, RDMA_READ_RESPONSE_ONLY),
109         IB_OPCODE(RC, ACKNOWLEDGE),
110         IB_OPCODE(RC, ATOMIC_ACKNOWLEDGE),
111         IB_OPCODE(RC, COMPARE_SWAP),
112         IB_OPCODE(RC, FETCH_ADD),
113         IB_OPCODE(RC, SEND_LAST_WITH_INVALIDATE),
114         IB_OPCODE(RC, SEND_ONLY_WITH_INVALIDATE),
115 
116         /* UC */
117         IB_OPCODE(UC, SEND_FIRST),
118         IB_OPCODE(UC, SEND_MIDDLE),
119         IB_OPCODE(UC, SEND_LAST),
120         IB_OPCODE(UC, SEND_LAST_WITH_IMMEDIATE),
121         IB_OPCODE(UC, SEND_ONLY),
122         IB_OPCODE(UC, SEND_ONLY_WITH_IMMEDIATE),
123         IB_OPCODE(UC, RDMA_WRITE_FIRST),
124         IB_OPCODE(UC, RDMA_WRITE_MIDDLE),
125         IB_OPCODE(UC, RDMA_WRITE_LAST),
126         IB_OPCODE(UC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
127         IB_OPCODE(UC, RDMA_WRITE_ONLY),
128         IB_OPCODE(UC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
129 
130         /* RD */
131         IB_OPCODE(RD, SEND_FIRST),
132         IB_OPCODE(RD, SEND_MIDDLE),
133         IB_OPCODE(RD, SEND_LAST),
134         IB_OPCODE(RD, SEND_LAST_WITH_IMMEDIATE),
135         IB_OPCODE(RD, SEND_ONLY),
136         IB_OPCODE(RD, SEND_ONLY_WITH_IMMEDIATE),
137         IB_OPCODE(RD, RDMA_WRITE_FIRST),
138         IB_OPCODE(RD, RDMA_WRITE_MIDDLE),
139         IB_OPCODE(RD, RDMA_WRITE_LAST),
140         IB_OPCODE(RD, RDMA_WRITE_LAST_WITH_IMMEDIATE),
141         IB_OPCODE(RD, RDMA_WRITE_ONLY),
142         IB_OPCODE(RD, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
143         IB_OPCODE(RD, RDMA_READ_REQUEST),
144         IB_OPCODE(RD, RDMA_READ_RESPONSE_FIRST),
145         IB_OPCODE(RD, RDMA_READ_RESPONSE_MIDDLE),
146         IB_OPCODE(RD, RDMA_READ_RESPONSE_LAST),
147         IB_OPCODE(RD, RDMA_READ_RESPONSE_ONLY),
148         IB_OPCODE(RD, ACKNOWLEDGE),
149         IB_OPCODE(RD, ATOMIC_ACKNOWLEDGE),
150         IB_OPCODE(RD, COMPARE_SWAP),
151         IB_OPCODE(RD, FETCH_ADD),
152 
153         /* UD */
154         IB_OPCODE(UD, SEND_ONLY),
155         IB_OPCODE(UD, SEND_ONLY_WITH_IMMEDIATE)
156 };
157 
158 enum {
159         IB_LNH_RAW        = 0,
160         IB_LNH_IP         = 1,
161         IB_LNH_IBA_LOCAL  = 2,
162         IB_LNH_IBA_GLOBAL = 3
163 };
164 
165 struct ib_unpacked_lrh {
166         u8        virtual_lane;
167         u8        link_version;
168         u8        service_level;
169         u8        link_next_header;
170         __be16    destination_lid;
171         __be16    packet_length;
172         __be16    source_lid;
173 };
174 
175 struct ib_unpacked_grh {
176         u8           ip_version;
177         u8           traffic_class;
178         __be32       flow_label;
179         __be16       payload_length;
180         u8           next_header;
181         u8           hop_limit;
182         union ib_gid source_gid;
183         union ib_gid destination_gid;
184 };
185 
186 struct ib_unpacked_bth {
187         u8           opcode;
188         u8           solicited_event;
189         u8           mig_req;
190         u8           pad_count;
191         u8           transport_header_version;
192         __be16       pkey;
193         __be32       destination_qpn;
194         u8           ack_req;
195         __be32       psn;
196 };
197 
198 struct ib_unpacked_deth {
199         __be32       qkey;
200         __be32       source_qpn;
201 };
202 
203 struct ib_unpacked_eth {
204         u8      dmac_h[4];
205         u8      dmac_l[2];
206         u8      smac_h[2];
207         u8      smac_l[4];
208         __be16  type;
209 };
210 
211 struct ib_unpacked_ip4 {
212         u8      ver;
213         u8      hdr_len;
214         u8      tos;
215         __be16  tot_len;
216         __be16  id;
217         __be16  frag_off;
218         u8      ttl;
219         u8      protocol;
220         __sum16 check;
221         __be32  saddr;
222         __be32  daddr;
223 };
224 
225 struct ib_unpacked_udp {
226         __be16  sport;
227         __be16  dport;
228         __be16  length;
229         __be16  csum;
230 };
231 
232 struct ib_unpacked_vlan {
233         __be16  tag;
234         __be16  type;
235 };
236 
237 struct ib_ud_header {
238         int                     lrh_present;
239         struct ib_unpacked_lrh  lrh;
240         int                     eth_present;
241         struct ib_unpacked_eth  eth;
242         int                     vlan_present;
243         struct ib_unpacked_vlan vlan;
244         int                     grh_present;
245         struct ib_unpacked_grh  grh;
246         int                     ipv4_present;
247         struct ib_unpacked_ip4  ip4;
248         int                     udp_present;
249         struct ib_unpacked_udp  udp;
250         struct ib_unpacked_bth  bth;
251         struct ib_unpacked_deth deth;
252         int                     immediate_present;
253         __be32                  immediate_data;
254 };
255 
256 void ib_pack(const struct ib_field        *desc,
257              int                           desc_len,
258              void                         *structure,
259              void                         *buf);
260 
261 void ib_unpack(const struct ib_field        *desc,
262                int                           desc_len,
263                void                         *buf,
264                void                         *structure);
265 
266 __sum16 ib_ud_ip4_csum(struct ib_ud_header *header);
267 
268 int ib_ud_header_init(int                   payload_bytes,
269                       int                   lrh_present,
270                       int                   eth_present,
271                       int                   vlan_present,
272                       int                   grh_present,
273                       int                   ip_version,
274                       int                   udp_present,
275                       int                   immediate_present,
276                       struct ib_ud_header *header);
277 
278 int ib_ud_header_pack(struct ib_ud_header *header,
279                       void                *buf);
280 
281 int ib_ud_header_unpack(void                *buf,
282                         struct ib_ud_header *header);
283 
284 #endif /* IB_PACK_H */
285 

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