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

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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 
 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_IP4_BYTES  = 20,
 45         IB_UDP_BYTES  = 8,
 46         IB_BTH_BYTES  = 12,
 47         IB_DETH_BYTES = 8
 48 };
 49 
 50 struct 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 
 75 enum {
 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,
 81         /* per IBTA 1.3 vol 1 Table 38, A10.3.2 */
 82         IB_OPCODE_CNP                               = 0x80,
 83 
 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         /* opcode 0x15 is reserved */
107         IB_OPCODE_SEND_LAST_WITH_INVALIDATE         = 0x16,
108         IB_OPCODE_SEND_ONLY_WITH_INVALIDATE         = 0x17,
109 
110         /* real constants follow -- see comment about above IB_OPCODE()
111            macro for more details */
112 
113         /* RC */
114         IB_OPCODE(RC, SEND_FIRST),
115         IB_OPCODE(RC, SEND_MIDDLE),
116         IB_OPCODE(RC, SEND_LAST),
117         IB_OPCODE(RC, SEND_LAST_WITH_IMMEDIATE),
118         IB_OPCODE(RC, SEND_ONLY),
119         IB_OPCODE(RC, SEND_ONLY_WITH_IMMEDIATE),
120         IB_OPCODE(RC, RDMA_WRITE_FIRST),
121         IB_OPCODE(RC, RDMA_WRITE_MIDDLE),
122         IB_OPCODE(RC, RDMA_WRITE_LAST),
123         IB_OPCODE(RC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
124         IB_OPCODE(RC, RDMA_WRITE_ONLY),
125         IB_OPCODE(RC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
126         IB_OPCODE(RC, RDMA_READ_REQUEST),
127         IB_OPCODE(RC, RDMA_READ_RESPONSE_FIRST),
128         IB_OPCODE(RC, RDMA_READ_RESPONSE_MIDDLE),
129         IB_OPCODE(RC, RDMA_READ_RESPONSE_LAST),
130         IB_OPCODE(RC, RDMA_READ_RESPONSE_ONLY),
131         IB_OPCODE(RC, ACKNOWLEDGE),
132         IB_OPCODE(RC, ATOMIC_ACKNOWLEDGE),
133         IB_OPCODE(RC, COMPARE_SWAP),
134         IB_OPCODE(RC, FETCH_ADD),
135         IB_OPCODE(RC, SEND_LAST_WITH_INVALIDATE),
136         IB_OPCODE(RC, SEND_ONLY_WITH_INVALIDATE),
137 
138         /* UC */
139         IB_OPCODE(UC, SEND_FIRST),
140         IB_OPCODE(UC, SEND_MIDDLE),
141         IB_OPCODE(UC, SEND_LAST),
142         IB_OPCODE(UC, SEND_LAST_WITH_IMMEDIATE),
143         IB_OPCODE(UC, SEND_ONLY),
144         IB_OPCODE(UC, SEND_ONLY_WITH_IMMEDIATE),
145         IB_OPCODE(UC, RDMA_WRITE_FIRST),
146         IB_OPCODE(UC, RDMA_WRITE_MIDDLE),
147         IB_OPCODE(UC, RDMA_WRITE_LAST),
148         IB_OPCODE(UC, RDMA_WRITE_LAST_WITH_IMMEDIATE),
149         IB_OPCODE(UC, RDMA_WRITE_ONLY),
150         IB_OPCODE(UC, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
151 
152         /* RD */
153         IB_OPCODE(RD, SEND_FIRST),
154         IB_OPCODE(RD, SEND_MIDDLE),
155         IB_OPCODE(RD, SEND_LAST),
156         IB_OPCODE(RD, SEND_LAST_WITH_IMMEDIATE),
157         IB_OPCODE(RD, SEND_ONLY),
158         IB_OPCODE(RD, SEND_ONLY_WITH_IMMEDIATE),
159         IB_OPCODE(RD, RDMA_WRITE_FIRST),
160         IB_OPCODE(RD, RDMA_WRITE_MIDDLE),
161         IB_OPCODE(RD, RDMA_WRITE_LAST),
162         IB_OPCODE(RD, RDMA_WRITE_LAST_WITH_IMMEDIATE),
163         IB_OPCODE(RD, RDMA_WRITE_ONLY),
164         IB_OPCODE(RD, RDMA_WRITE_ONLY_WITH_IMMEDIATE),
165         IB_OPCODE(RD, RDMA_READ_REQUEST),
166         IB_OPCODE(RD, RDMA_READ_RESPONSE_FIRST),
167         IB_OPCODE(RD, RDMA_READ_RESPONSE_MIDDLE),
168         IB_OPCODE(RD, RDMA_READ_RESPONSE_LAST),
169         IB_OPCODE(RD, RDMA_READ_RESPONSE_ONLY),
170         IB_OPCODE(RD, ACKNOWLEDGE),
171         IB_OPCODE(RD, ATOMIC_ACKNOWLEDGE),
172         IB_OPCODE(RD, COMPARE_SWAP),
173         IB_OPCODE(RD, FETCH_ADD),
174 
175         /* UD */
176         IB_OPCODE(UD, SEND_ONLY),
177         IB_OPCODE(UD, SEND_ONLY_WITH_IMMEDIATE)
178 };
179 
180 enum {
181         IB_LNH_RAW        = 0,
182         IB_LNH_IP         = 1,
183         IB_LNH_IBA_LOCAL  = 2,
184         IB_LNH_IBA_GLOBAL = 3
185 };
186 
187 struct ib_unpacked_lrh {
188         u8        virtual_lane;
189         u8        link_version;
190         u8        service_level;
191         u8        link_next_header;
192         __be16    destination_lid;
193         __be16    packet_length;
194         __be16    source_lid;
195 };
196 
197 struct ib_unpacked_grh {
198         u8           ip_version;
199         u8           traffic_class;
200         __be32       flow_label;
201         __be16       payload_length;
202         u8           next_header;
203         u8           hop_limit;
204         union ib_gid source_gid;
205         union ib_gid destination_gid;
206 };
207 
208 struct ib_unpacked_bth {
209         u8           opcode;
210         u8           solicited_event;
211         u8           mig_req;
212         u8           pad_count;
213         u8           transport_header_version;
214         __be16       pkey;
215         __be32       destination_qpn;
216         u8           ack_req;
217         __be32       psn;
218 };
219 
220 struct ib_unpacked_deth {
221         __be32       qkey;
222         __be32       source_qpn;
223 };
224 
225 struct ib_unpacked_eth {
226         u8      dmac_h[4];
227         u8      dmac_l[2];
228         u8      smac_h[2];
229         u8      smac_l[4];
230         __be16  type;
231 };
232 
233 struct ib_unpacked_ip4 {
234         u8      ver;
235         u8      hdr_len;
236         u8      tos;
237         __be16  tot_len;
238         __be16  id;
239         __be16  frag_off;
240         u8      ttl;
241         u8      protocol;
242         __sum16 check;
243         __be32  saddr;
244         __be32  daddr;
245 };
246 
247 struct ib_unpacked_udp {
248         __be16  sport;
249         __be16  dport;
250         __be16  length;
251         __be16  csum;
252 };
253 
254 struct ib_unpacked_vlan {
255         __be16  tag;
256         __be16  type;
257 };
258 
259 struct ib_ud_header {
260         int                     lrh_present;
261         struct ib_unpacked_lrh  lrh;
262         int                     eth_present;
263         struct ib_unpacked_eth  eth;
264         int                     vlan_present;
265         struct ib_unpacked_vlan vlan;
266         int                     grh_present;
267         struct ib_unpacked_grh  grh;
268         int                     ipv4_present;
269         struct ib_unpacked_ip4  ip4;
270         int                     udp_present;
271         struct ib_unpacked_udp  udp;
272         struct ib_unpacked_bth  bth;
273         struct ib_unpacked_deth deth;
274         int                     immediate_present;
275         __be32                  immediate_data;
276 };
277 
278 void ib_pack(const struct ib_field        *desc,
279              int                           desc_len,
280              void                         *structure,
281              void                         *buf);
282 
283 void ib_unpack(const struct ib_field        *desc,
284                int                           desc_len,
285                void                         *buf,
286                void                         *structure);
287 
288 __sum16 ib_ud_ip4_csum(struct ib_ud_header *header);
289 
290 int ib_ud_header_init(int                   payload_bytes,
291                       int                   lrh_present,
292                       int                   eth_present,
293                       int                   vlan_present,
294                       int                   grh_present,
295                       int                   ip_version,
296                       int                   udp_present,
297                       int                   immediate_present,
298                       struct ib_ud_header *header);
299 
300 int ib_ud_header_pack(struct ib_ud_header *header,
301                       void                *buf);
302 
303 int ib_ud_header_unpack(void                *buf,
304                         struct ib_ud_header *header);
305 
306 #endif /* IB_PACK_H */
307 

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