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1 /*
2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
3  * Copyright (c) 2005 Voltaire, Inc.  All rights reserved.
4  * Copyright (c) 2006 Intel Corporation.  All rights reserved.
5  *
6  * This software is available to you under a choice of one of two
7  * licenses.  You may choose to be licensed under the terms of the GNU
8  * General Public License (GPL) Version 2, available from the file
9  * COPYING in the main directory of this source tree, or the
10  * OpenIB.org BSD license below:
11  *
12  *     Redistribution and use in source and binary forms, with or
13  *     without modification, are permitted provided that the following
14  *     conditions are met:
15  *
16  *      - Redistributions of source code must retain the above
17  *        copyright notice, this list of conditions and the following
18  *        disclaimer.
19  *
20  *      - Redistributions in binary form must reproduce the above
21  *        copyright notice, this list of conditions and the following
22  *        disclaimer in the documentation and/or other materials
23  *        provided with the distribution.
24  *
25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32  * SOFTWARE.
33  */
34
35 #ifndef IB_SA_H
36 #define IB_SA_H
37
38 #include <linux/completion.h>
39 #include <linux/compiler.h>
40
41 #include <linux/atomic.h>
42 #include <linux/netdevice.h>
43
44 #include <rdma/ib_verbs.h>
45 #include <rdma/ib_mad.h>
46 #include <rdma/ib_addr.h>
47 #include <rdma/opa_addr.h>
48
49 enum {
50         IB_SA_CLASS_VERSION             = 2,    /* IB spec version 1.1/1.2 */
51
52         IB_SA_METHOD_GET_TABLE          = 0x12,
53         IB_SA_METHOD_GET_TABLE_RESP     = 0x92,
54         IB_SA_METHOD_DELETE             = 0x15,
55         IB_SA_METHOD_DELETE_RESP        = 0x95,
56         IB_SA_METHOD_GET_MULTI          = 0x14,
57         IB_SA_METHOD_GET_MULTI_RESP     = 0x94,
58         IB_SA_METHOD_GET_TRACE_TBL      = 0x13
59 };
60
61 #define OPA_SA_CLASS_VERSION    0x80
62 enum {
63         IB_SA_ATTR_CLASS_PORTINFO    = 0x01,
64         IB_SA_ATTR_NOTICE            = 0x02,
65         IB_SA_ATTR_INFORM_INFO       = 0x03,
66         IB_SA_ATTR_NODE_REC          = 0x11,
67         IB_SA_ATTR_PORT_INFO_REC     = 0x12,
68         IB_SA_ATTR_SL2VL_REC         = 0x13,
69         IB_SA_ATTR_SWITCH_REC        = 0x14,
70         IB_SA_ATTR_LINEAR_FDB_REC    = 0x15,
71         IB_SA_ATTR_RANDOM_FDB_REC    = 0x16,
72         IB_SA_ATTR_MCAST_FDB_REC     = 0x17,
73         IB_SA_ATTR_SM_INFO_REC       = 0x18,
74         IB_SA_ATTR_LINK_REC          = 0x20,
75         IB_SA_ATTR_GUID_INFO_REC     = 0x30,
76         IB_SA_ATTR_SERVICE_REC       = 0x31,
77         IB_SA_ATTR_PARTITION_REC     = 0x33,
78         IB_SA_ATTR_PATH_REC          = 0x35,
79         IB_SA_ATTR_VL_ARB_REC        = 0x36,
80         IB_SA_ATTR_MC_MEMBER_REC     = 0x38,
81         IB_SA_ATTR_TRACE_REC         = 0x39,
82         IB_SA_ATTR_MULTI_PATH_REC    = 0x3a,
83         IB_SA_ATTR_SERVICE_ASSOC_REC = 0x3b,
84         IB_SA_ATTR_INFORM_INFO_REC   = 0xf3
85 };
86
87 enum ib_sa_selector {
88         IB_SA_GT   = 0,
89         IB_SA_LT   = 1,
90         IB_SA_EQ   = 2,
91         /*
92          * The meaning of "best" depends on the attribute: for
93          * example, for MTU best will return the largest available
94          * MTU, while for packet life time, best will return the
95          * smallest available life time.
96          */
97         IB_SA_BEST = 3
98 };
99
100 /*
101  * There are 4 types of join states:
102  * FullMember, NonMember, SendOnlyNonMember, SendOnlyFullMember.
103  * The order corresponds to JoinState bits in MCMemberRecord.
104  */
105 enum ib_sa_mc_join_states {
106         FULLMEMBER_JOIN,
107         NONMEMBER_JOIN,
108         SENDONLY_NONMEBER_JOIN,
109         SENDONLY_FULLMEMBER_JOIN,
110         NUM_JOIN_MEMBERSHIP_TYPES,
111 };
112
113 #define IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT       BIT(12)
114
115 /*
116  * Structures for SA records are named "struct ib_sa_xxx_rec."  No
117  * attempt is made to pack structures to match the physical layout of
118  * SA records in SA MADs; all packing and unpacking is handled by the
119  * SA query code.
120  *
121  * For a record with structure ib_sa_xxx_rec, the naming convention
122  * for the component mask value for field yyy is IB_SA_XXX_REC_YYY (we
123  * never use different abbreviations or otherwise change the spelling
124  * of xxx/yyy between ib_sa_xxx_rec.yyy and IB_SA_XXX_REC_YYY).
125  *
126  * Reserved rows are indicated with comments to help maintainability.
127  */
128
129 #define IB_SA_PATH_REC_SERVICE_ID                      (IB_SA_COMP_MASK( 0) |\
130                                                         IB_SA_COMP_MASK( 1))
131 #define IB_SA_PATH_REC_DGID                             IB_SA_COMP_MASK( 2)
132 #define IB_SA_PATH_REC_SGID                             IB_SA_COMP_MASK( 3)
133 #define IB_SA_PATH_REC_DLID                             IB_SA_COMP_MASK( 4)
134 #define IB_SA_PATH_REC_SLID                             IB_SA_COMP_MASK( 5)
135 #define IB_SA_PATH_REC_RAW_TRAFFIC                      IB_SA_COMP_MASK( 6)
136 /* reserved:                                                             7 */
137 #define IB_SA_PATH_REC_FLOW_LABEL                       IB_SA_COMP_MASK( 8)
138 #define IB_SA_PATH_REC_HOP_LIMIT                        IB_SA_COMP_MASK( 9)
139 #define IB_SA_PATH_REC_TRAFFIC_CLASS                    IB_SA_COMP_MASK(10)
140 #define IB_SA_PATH_REC_REVERSIBLE                       IB_SA_COMP_MASK(11)
141 #define IB_SA_PATH_REC_NUMB_PATH                        IB_SA_COMP_MASK(12)
142 #define IB_SA_PATH_REC_PKEY                             IB_SA_COMP_MASK(13)
143 #define IB_SA_PATH_REC_QOS_CLASS                        IB_SA_COMP_MASK(14)
144 #define IB_SA_PATH_REC_SL                               IB_SA_COMP_MASK(15)
145 #define IB_SA_PATH_REC_MTU_SELECTOR                     IB_SA_COMP_MASK(16)
146 #define IB_SA_PATH_REC_MTU                              IB_SA_COMP_MASK(17)
147 #define IB_SA_PATH_REC_RATE_SELECTOR                    IB_SA_COMP_MASK(18)
148 #define IB_SA_PATH_REC_RATE                             IB_SA_COMP_MASK(19)
149 #define IB_SA_PATH_REC_PACKET_LIFE_TIME_SELECTOR        IB_SA_COMP_MASK(20)
150 #define IB_SA_PATH_REC_PACKET_LIFE_TIME                 IB_SA_COMP_MASK(21)
151 #define IB_SA_PATH_REC_PREFERENCE                       IB_SA_COMP_MASK(22)
152
153 enum sa_path_rec_type {
154         SA_PATH_REC_TYPE_IB,
155         SA_PATH_REC_TYPE_ROCE_V1,
156         SA_PATH_REC_TYPE_ROCE_V2,
157         SA_PATH_REC_TYPE_OPA
158 };
159
160 struct sa_path_rec_ib {
161         __be64       service_id;
162         __be16       dlid;
163         __be16       slid;
164         u8           raw_traffic;
165 };
166
167 struct sa_path_rec_roce {
168         u8           dmac[ETH_ALEN];
169         /* ignored in IB */
170         int          ifindex;
171         /* ignored in IB */
172         struct net  *net;
173
174 };
175
176 struct sa_path_rec_opa {
177         __be64       service_id;
178         __be32       dlid;
179         __be32       slid;
180         u8           raw_traffic;
181         u8           l2_8B;
182         u8           l2_10B;
183         u8           l2_9B;
184         u8           l2_16B;
185         u8           qos_type;
186         u8           qos_priority;
187 };
188
189 struct sa_path_rec {
190         union ib_gid dgid;
191         union ib_gid sgid;
192         /* reserved */
193         __be32       flow_label;
194         u8           hop_limit;
195         u8           traffic_class;
196         u8           reversible;
197         u8           numb_path;
198         __be16       pkey;
199         __be16       qos_class;
200         u8           sl;
201         u8           mtu_selector;
202         u8           mtu;
203         u8           rate_selector;
204         u8           rate;
205         u8           packet_life_time_selector;
206         u8           packet_life_time;
207         u8           preference;
208         union {
209                 struct sa_path_rec_ib ib;
210                 struct sa_path_rec_roce roce;
211                 struct sa_path_rec_opa opa;
212         };
213         enum sa_path_rec_type rec_type;
214 };
215
216 static inline enum ib_gid_type
217                 sa_conv_pathrec_to_gid_type(struct sa_path_rec *rec)
218 {
219         switch (rec->rec_type) {
220         case SA_PATH_REC_TYPE_ROCE_V1:
221                 return IB_GID_TYPE_ROCE;
222         case SA_PATH_REC_TYPE_ROCE_V2:
223                 return IB_GID_TYPE_ROCE_UDP_ENCAP;
224         default:
225                 return IB_GID_TYPE_IB;
226         }
227 }
228
229 static inline enum sa_path_rec_type
230                 sa_conv_gid_to_pathrec_type(enum ib_gid_type type)
231 {
232         switch (type) {
233         case IB_GID_TYPE_ROCE:
234                 return SA_PATH_REC_TYPE_ROCE_V1;
235         case IB_GID_TYPE_ROCE_UDP_ENCAP:
236                 return SA_PATH_REC_TYPE_ROCE_V2;
237         default:
238                 return SA_PATH_REC_TYPE_IB;
239         }
240 }
241
242 static inline void path_conv_opa_to_ib(struct sa_path_rec *ib,
243                                        struct sa_path_rec *opa)
244 {
245         if ((be32_to_cpu(opa->opa.dlid) >=
246              be16_to_cpu(IB_MULTICAST_LID_BASE)) ||
247             (be32_to_cpu(opa->opa.slid) >=
248              be16_to_cpu(IB_MULTICAST_LID_BASE))) {
249                 /* Create OPA GID and zero out the LID */
250                 ib->dgid.global.interface_id
251                                 = OPA_MAKE_ID(be32_to_cpu(opa->opa.dlid));
252                 ib->dgid.global.subnet_prefix
253                                 = opa->dgid.global.subnet_prefix;
254                 ib->sgid.global.interface_id
255                                 = OPA_MAKE_ID(be32_to_cpu(opa->opa.slid));
256                 ib->dgid.global.subnet_prefix
257                                 = opa->dgid.global.subnet_prefix;
258                 ib->ib.dlid     = 0;
259
260                 ib->ib.slid     = 0;
261         } else {
262                 ib->ib.dlid     = htons(ntohl(opa->opa.dlid));
263                 ib->ib.slid     = htons(ntohl(opa->opa.slid));
264         }
265         ib->ib.service_id       = opa->opa.service_id;
266         ib->ib.raw_traffic      = opa->opa.raw_traffic;
267 }
268
269 static inline void path_conv_ib_to_opa(struct sa_path_rec *opa,
270                                        struct sa_path_rec *ib)
271 {
272         __be32 slid, dlid;
273
274         if ((ib_is_opa_gid(&ib->sgid)) ||
275             (ib_is_opa_gid(&ib->dgid))) {
276                 slid = htonl(opa_get_lid_from_gid(&ib->sgid));
277                 dlid = htonl(opa_get_lid_from_gid(&ib->dgid));
278         } else {
279                 slid = htonl(ntohs(ib->ib.slid));
280                 dlid = htonl(ntohs(ib->ib.dlid));
281         }
282         opa->opa.slid           = slid;
283         opa->opa.dlid           = dlid;
284         opa->opa.service_id     = ib->ib.service_id;
285         opa->opa.raw_traffic    = ib->ib.raw_traffic;
286 }
287
288 /* Convert from OPA to IB path record */
289 static inline void sa_convert_path_opa_to_ib(struct sa_path_rec *dest,
290                                              struct sa_path_rec *src)
291 {
292         if (src->rec_type != SA_PATH_REC_TYPE_OPA)
293                 return;
294
295         *dest = *src;
296         dest->rec_type = SA_PATH_REC_TYPE_IB;
297         path_conv_opa_to_ib(dest, src);
298 }
299
300 /* Convert from IB to OPA path record */
301 static inline void sa_convert_path_ib_to_opa(struct sa_path_rec *dest,
302                                              struct sa_path_rec *src)
303 {
304         if (src->rec_type != SA_PATH_REC_TYPE_IB)
305                 return;
306
307         /* Do a structure copy and overwrite the relevant fields */
308         *dest = *src;
309         dest->rec_type = SA_PATH_REC_TYPE_OPA;
310         path_conv_ib_to_opa(dest, src);
311 }
312
313 #define IB_SA_MCMEMBER_REC_MGID                         IB_SA_COMP_MASK( 0)
314 #define IB_SA_MCMEMBER_REC_PORT_GID                     IB_SA_COMP_MASK( 1)
315 #define IB_SA_MCMEMBER_REC_QKEY                         IB_SA_COMP_MASK( 2)
316 #define IB_SA_MCMEMBER_REC_MLID                         IB_SA_COMP_MASK( 3)
317 #define IB_SA_MCMEMBER_REC_MTU_SELECTOR                 IB_SA_COMP_MASK( 4)
318 #define IB_SA_MCMEMBER_REC_MTU                          IB_SA_COMP_MASK( 5)
319 #define IB_SA_MCMEMBER_REC_TRAFFIC_CLASS                IB_SA_COMP_MASK( 6)
320 #define IB_SA_MCMEMBER_REC_PKEY                         IB_SA_COMP_MASK( 7)
321 #define IB_SA_MCMEMBER_REC_RATE_SELECTOR                IB_SA_COMP_MASK( 8)
322 #define IB_SA_MCMEMBER_REC_RATE                         IB_SA_COMP_MASK( 9)
323 #define IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME_SELECTOR    IB_SA_COMP_MASK(10)
324 #define IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME             IB_SA_COMP_MASK(11)
325 #define IB_SA_MCMEMBER_REC_SL                           IB_SA_COMP_MASK(12)
326 #define IB_SA_MCMEMBER_REC_FLOW_LABEL                   IB_SA_COMP_MASK(13)
327 #define IB_SA_MCMEMBER_REC_HOP_LIMIT                    IB_SA_COMP_MASK(14)
328 #define IB_SA_MCMEMBER_REC_SCOPE                        IB_SA_COMP_MASK(15)
329 #define IB_SA_MCMEMBER_REC_JOIN_STATE                   IB_SA_COMP_MASK(16)
330 #define IB_SA_MCMEMBER_REC_PROXY_JOIN                   IB_SA_COMP_MASK(17)
331
332 struct ib_sa_mcmember_rec {
333         union ib_gid mgid;
334         union ib_gid port_gid;
335         __be32       qkey;
336         __be16       mlid;
337         u8           mtu_selector;
338         u8           mtu;
339         u8           traffic_class;
340         __be16       pkey;
341         u8           rate_selector;
342         u8           rate;
343         u8           packet_life_time_selector;
344         u8           packet_life_time;
345         u8           sl;
346         __be32       flow_label;
347         u8           hop_limit;
348         u8           scope;
349         u8           join_state;
350         u8           proxy_join;
351 };
352
353 /* Service Record Component Mask Sec 15.2.5.14 Ver 1.1  */
354 #define IB_SA_SERVICE_REC_SERVICE_ID                    IB_SA_COMP_MASK( 0)
355 #define IB_SA_SERVICE_REC_SERVICE_GID                   IB_SA_COMP_MASK( 1)
356 #define IB_SA_SERVICE_REC_SERVICE_PKEY                  IB_SA_COMP_MASK( 2)
357 /* reserved:                                                             3 */
358 #define IB_SA_SERVICE_REC_SERVICE_LEASE                 IB_SA_COMP_MASK( 4)
359 #define IB_SA_SERVICE_REC_SERVICE_KEY                   IB_SA_COMP_MASK( 5)
360 #define IB_SA_SERVICE_REC_SERVICE_NAME                  IB_SA_COMP_MASK( 6)
361 #define IB_SA_SERVICE_REC_SERVICE_DATA8_0               IB_SA_COMP_MASK( 7)
362 #define IB_SA_SERVICE_REC_SERVICE_DATA8_1               IB_SA_COMP_MASK( 8)
363 #define IB_SA_SERVICE_REC_SERVICE_DATA8_2               IB_SA_COMP_MASK( 9)
364 #define IB_SA_SERVICE_REC_SERVICE_DATA8_3               IB_SA_COMP_MASK(10)
365 #define IB_SA_SERVICE_REC_SERVICE_DATA8_4               IB_SA_COMP_MASK(11)
366 #define IB_SA_SERVICE_REC_SERVICE_DATA8_5               IB_SA_COMP_MASK(12)
367 #define IB_SA_SERVICE_REC_SERVICE_DATA8_6               IB_SA_COMP_MASK(13)
368 #define IB_SA_SERVICE_REC_SERVICE_DATA8_7               IB_SA_COMP_MASK(14)
369 #define IB_SA_SERVICE_REC_SERVICE_DATA8_8               IB_SA_COMP_MASK(15)
370 #define IB_SA_SERVICE_REC_SERVICE_DATA8_9               IB_SA_COMP_MASK(16)
371 #define IB_SA_SERVICE_REC_SERVICE_DATA8_10              IB_SA_COMP_MASK(17)
372 #define IB_SA_SERVICE_REC_SERVICE_DATA8_11              IB_SA_COMP_MASK(18)
373 #define IB_SA_SERVICE_REC_SERVICE_DATA8_12              IB_SA_COMP_MASK(19)
374 #define IB_SA_SERVICE_REC_SERVICE_DATA8_13              IB_SA_COMP_MASK(20)
375 #define IB_SA_SERVICE_REC_SERVICE_DATA8_14              IB_SA_COMP_MASK(21)
376 #define IB_SA_SERVICE_REC_SERVICE_DATA8_15              IB_SA_COMP_MASK(22)
377 #define IB_SA_SERVICE_REC_SERVICE_DATA16_0              IB_SA_COMP_MASK(23)
378 #define IB_SA_SERVICE_REC_SERVICE_DATA16_1              IB_SA_COMP_MASK(24)
379 #define IB_SA_SERVICE_REC_SERVICE_DATA16_2              IB_SA_COMP_MASK(25)
380 #define IB_SA_SERVICE_REC_SERVICE_DATA16_3              IB_SA_COMP_MASK(26)
381 #define IB_SA_SERVICE_REC_SERVICE_DATA16_4              IB_SA_COMP_MASK(27)
382 #define IB_SA_SERVICE_REC_SERVICE_DATA16_5              IB_SA_COMP_MASK(28)
383 #define IB_SA_SERVICE_REC_SERVICE_DATA16_6              IB_SA_COMP_MASK(29)
384 #define IB_SA_SERVICE_REC_SERVICE_DATA16_7              IB_SA_COMP_MASK(30)
385 #define IB_SA_SERVICE_REC_SERVICE_DATA32_0              IB_SA_COMP_MASK(31)
386 #define IB_SA_SERVICE_REC_SERVICE_DATA32_1              IB_SA_COMP_MASK(32)
387 #define IB_SA_SERVICE_REC_SERVICE_DATA32_2              IB_SA_COMP_MASK(33)
388 #define IB_SA_SERVICE_REC_SERVICE_DATA32_3              IB_SA_COMP_MASK(34)
389 #define IB_SA_SERVICE_REC_SERVICE_DATA64_0              IB_SA_COMP_MASK(35)
390 #define IB_SA_SERVICE_REC_SERVICE_DATA64_1              IB_SA_COMP_MASK(36)
391
392 #define IB_DEFAULT_SERVICE_LEASE        0xFFFFFFFF
393
394 struct ib_sa_service_rec {
395         u64             id;
396         union ib_gid    gid;
397         __be16          pkey;
398         /* reserved */
399         u32             lease;
400         u8              key[16];
401         u8              name[64];
402         u8              data8[16];
403         u16             data16[8];
404         u32             data32[4];
405         u64             data64[2];
406 };
407
408 #define IB_SA_GUIDINFO_REC_LID          IB_SA_COMP_MASK(0)
409 #define IB_SA_GUIDINFO_REC_BLOCK_NUM    IB_SA_COMP_MASK(1)
410 #define IB_SA_GUIDINFO_REC_RES1         IB_SA_COMP_MASK(2)
411 #define IB_SA_GUIDINFO_REC_RES2         IB_SA_COMP_MASK(3)
412 #define IB_SA_GUIDINFO_REC_GID0         IB_SA_COMP_MASK(4)
413 #define IB_SA_GUIDINFO_REC_GID1         IB_SA_COMP_MASK(5)
414 #define IB_SA_GUIDINFO_REC_GID2         IB_SA_COMP_MASK(6)
415 #define IB_SA_GUIDINFO_REC_GID3         IB_SA_COMP_MASK(7)
416 #define IB_SA_GUIDINFO_REC_GID4         IB_SA_COMP_MASK(8)
417 #define IB_SA_GUIDINFO_REC_GID5         IB_SA_COMP_MASK(9)
418 #define IB_SA_GUIDINFO_REC_GID6         IB_SA_COMP_MASK(10)
419 #define IB_SA_GUIDINFO_REC_GID7         IB_SA_COMP_MASK(11)
420
421 struct ib_sa_guidinfo_rec {
422         __be16  lid;
423         u8      block_num;
424         /* reserved */
425         u8      res1;
426         __be32  res2;
427         u8      guid_info_list[64];
428 };
429
430 struct ib_sa_client {
431         atomic_t users;
432         struct completion comp;
433 };
434
435 /**
436  * ib_sa_register_client - Register an SA client.
437  */
438 void ib_sa_register_client(struct ib_sa_client *client);
439
440 /**
441  * ib_sa_unregister_client - Deregister an SA client.
442  * @client: Client object to deregister.
443  */
444 void ib_sa_unregister_client(struct ib_sa_client *client);
445
446 struct ib_sa_query;
447
448 void ib_sa_cancel_query(int id, struct ib_sa_query *query);
449
450 int ib_sa_path_rec_get(struct ib_sa_client *client,
451                        struct ib_device *device, u8 port_num,
452                        struct sa_path_rec *rec,
453                        ib_sa_comp_mask comp_mask,
454                        int timeout_ms, gfp_t gfp_mask,
455                        void (*callback)(int status,
456                                         struct sa_path_rec *resp,
457                                         void *context),
458                        void *context,
459                        struct ib_sa_query **query);
460
461 int ib_sa_service_rec_query(struct ib_sa_client *client,
462                          struct ib_device *device, u8 port_num,
463                          u8 method,
464                          struct ib_sa_service_rec *rec,
465                          ib_sa_comp_mask comp_mask,
466                          int timeout_ms, gfp_t gfp_mask,
467                          void (*callback)(int status,
468                                           struct ib_sa_service_rec *resp,
469                                           void *context),
470                          void *context,
471                          struct ib_sa_query **sa_query);
472
473 struct ib_sa_multicast {
474         struct ib_sa_mcmember_rec rec;
475         ib_sa_comp_mask         comp_mask;
476         int                     (*callback)(int status,
477                                             struct ib_sa_multicast *multicast);
478         void                    *context;
479 };
480
481 /**
482  * ib_sa_join_multicast - Initiates a join request to the specified multicast
483  *   group.
484  * @client: SA client
485  * @device: Device associated with the multicast group.
486  * @port_num: Port on the specified device to associate with the multicast
487  *   group.
488  * @rec: SA multicast member record specifying group attributes.
489  * @comp_mask: Component mask indicating which group attributes of %rec are
490  *   valid.
491  * @gfp_mask: GFP mask for memory allocations.
492  * @callback: User callback invoked once the join operation completes.
493  * @context: User specified context stored with the ib_sa_multicast structure.
494  *
495  * This call initiates a multicast join request with the SA for the specified
496  * multicast group.  If the join operation is started successfully, it returns
497  * an ib_sa_multicast structure that is used to track the multicast operation.
498  * Users must free this structure by calling ib_free_multicast, even if the
499  * join operation later fails.  (The callback status is non-zero.)
500  *
501  * If the join operation fails; status will be non-zero, with the following
502  * failures possible:
503  * -ETIMEDOUT: The request timed out.
504  * -EIO: An error occurred sending the query.
505  * -EINVAL: The MCMemberRecord values differed from the existing group's.
506  * -ENETRESET: Indicates that an fatal error has occurred on the multicast
507  *   group, and the user must rejoin the group to continue using it.
508  */
509 struct ib_sa_multicast *ib_sa_join_multicast(struct ib_sa_client *client,
510                                              struct ib_device *device, u8 port_num,
511                                              struct ib_sa_mcmember_rec *rec,
512                                              ib_sa_comp_mask comp_mask, gfp_t gfp_mask,
513                                              int (*callback)(int status,
514                                                              struct ib_sa_multicast
515                                                                     *multicast),
516                                              void *context);
517
518 /**
519  * ib_free_multicast - Frees the multicast tracking structure, and releases
520  *    any reference on the multicast group.
521  * @multicast: Multicast tracking structure allocated by ib_join_multicast.
522  *
523  * This call blocks until the multicast identifier is destroyed.  It may
524  * not be called from within the multicast callback; however, returning a non-
525  * zero value from the callback will result in destroying the multicast
526  * tracking structure.
527  */
528 void ib_sa_free_multicast(struct ib_sa_multicast *multicast);
529
530 /**
531  * ib_get_mcmember_rec - Looks up a multicast member record by its MGID and
532  *   returns it if found.
533  * @device: Device associated with the multicast group.
534  * @port_num: Port on the specified device to associate with the multicast
535  *   group.
536  * @mgid: MGID of multicast group.
537  * @rec: Location to copy SA multicast member record.
538  */
539 int ib_sa_get_mcmember_rec(struct ib_device *device, u8 port_num,
540                            union ib_gid *mgid, struct ib_sa_mcmember_rec *rec);
541
542 /**
543  * ib_init_ah_from_mcmember - Initialize address handle attributes based on
544  * an SA multicast member record.
545  */
546 int ib_init_ah_from_mcmember(struct ib_device *device, u8 port_num,
547                              struct ib_sa_mcmember_rec *rec,
548                              struct net_device *ndev,
549                              enum ib_gid_type gid_type,
550                              struct rdma_ah_attr *ah_attr);
551
552 /**
553  * ib_init_ah_from_path - Initialize address handle attributes based on an SA
554  *   path record.
555  */
556 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
557                          struct sa_path_rec *rec,
558                          struct rdma_ah_attr *ah_attr);
559
560 /**
561  * ib_sa_pack_path - Conert a path record from struct ib_sa_path_rec
562  * to IB MAD wire format.
563  */
564 void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute);
565
566 /**
567  * ib_sa_unpack_path - Convert a path record from MAD format to struct
568  * ib_sa_path_rec.
569  */
570 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec);
571
572 /* Support GuidInfoRecord */
573 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
574                               struct ib_device *device, u8 port_num,
575                               struct ib_sa_guidinfo_rec *rec,
576                               ib_sa_comp_mask comp_mask, u8 method,
577                               int timeout_ms, gfp_t gfp_mask,
578                               void (*callback)(int status,
579                                                struct ib_sa_guidinfo_rec *resp,
580                                                void *context),
581                               void *context,
582                               struct ib_sa_query **sa_query);
583
584 bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
585                                     struct ib_device *device,
586                                     u8 port_num);
587
588 static inline bool sa_path_is_roce(struct sa_path_rec *rec)
589 {
590         return ((rec->rec_type == SA_PATH_REC_TYPE_ROCE_V1) ||
591                 (rec->rec_type == SA_PATH_REC_TYPE_ROCE_V2));
592 }
593
594 static inline void sa_path_set_service_id(struct sa_path_rec *rec,
595                                           __be64 service_id)
596 {
597         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
598                 rec->ib.service_id = service_id;
599         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
600                 rec->opa.service_id = service_id;
601 }
602
603 static inline void sa_path_set_slid(struct sa_path_rec *rec, __be32 slid)
604 {
605         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
606                 rec->ib.slid = htons(ntohl(slid));
607         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
608                 rec->opa.slid = slid;
609 }
610
611 static inline void sa_path_set_dlid(struct sa_path_rec *rec, __be32 dlid)
612 {
613         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
614                 rec->ib.dlid = htons(ntohl(dlid));
615         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
616                 rec->opa.dlid = dlid;
617 }
618
619 static inline void sa_path_set_raw_traffic(struct sa_path_rec *rec,
620                                            u8 raw_traffic)
621 {
622         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
623                 rec->ib.raw_traffic = raw_traffic;
624         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
625                 rec->opa.raw_traffic = raw_traffic;
626 }
627
628 static inline __be64 sa_path_get_service_id(struct sa_path_rec *rec)
629 {
630         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
631                 return rec->ib.service_id;
632         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
633                 return rec->opa.service_id;
634         return 0;
635 }
636
637 static inline __be32 sa_path_get_slid(struct sa_path_rec *rec)
638 {
639         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
640                 return htonl(ntohs(rec->ib.slid));
641         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
642                 return rec->opa.slid;
643         return 0;
644 }
645
646 static inline __be32 sa_path_get_dlid(struct sa_path_rec *rec)
647 {
648         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
649                 return htonl(ntohs(rec->ib.dlid));
650         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
651                 return rec->opa.dlid;
652         return 0;
653 }
654
655 static inline u8 sa_path_get_raw_traffic(struct sa_path_rec *rec)
656 {
657         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
658                 return rec->ib.raw_traffic;
659         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
660                 return rec->opa.raw_traffic;
661         return 0;
662 }
663
664 static inline void sa_path_set_dmac(struct sa_path_rec *rec, u8 *dmac)
665 {
666         if (sa_path_is_roce(rec))
667                 memcpy(rec->roce.dmac, dmac, ETH_ALEN);
668 }
669
670 static inline void sa_path_set_dmac_zero(struct sa_path_rec *rec)
671 {
672         if (sa_path_is_roce(rec))
673                 eth_zero_addr(rec->roce.dmac);
674 }
675
676 static inline void sa_path_set_ifindex(struct sa_path_rec *rec, int ifindex)
677 {
678         if (sa_path_is_roce(rec))
679                 rec->roce.ifindex = ifindex;
680 }
681
682 static inline void sa_path_set_ndev(struct sa_path_rec *rec, struct net *net)
683 {
684         if (sa_path_is_roce(rec))
685                 rec->roce.net = net;
686 }
687
688 static inline u8 *sa_path_get_dmac(struct sa_path_rec *rec)
689 {
690         if (sa_path_is_roce(rec))
691                 return rec->roce.dmac;
692         return NULL;
693 }
694
695 static inline int sa_path_get_ifindex(struct sa_path_rec *rec)
696 {
697         if (sa_path_is_roce(rec))
698                 return rec->roce.ifindex;
699         return 0;
700 }
701
702 static inline struct net *sa_path_get_ndev(struct sa_path_rec *rec)
703 {
704         if (sa_path_is_roce(rec))
705                 return rec->roce.net;
706         return NULL;
707 }
708
709 static inline struct net_device *ib_get_ndev_from_path(struct sa_path_rec *rec)
710 {
711         return sa_path_get_ndev(rec) ?
712                 dev_get_by_index(sa_path_get_ndev(rec),
713                                  sa_path_get_ifindex(rec))
714                 : NULL;
715 }
716
717 #endif /* IB_SA_H */