include/rdma/ib_sa.h

   1 /* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
   2 /*
   3  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   4  * Copyright (c) 2005 Voltaire, Inc.  All rights reserved.
   5  * Copyright (c) 2006 Intel Corporation.  All rights reserved.
   6  */
   7
   8 #ifndef IB_SA_H
   9 #define IB_SA_H
  10
  11 #include <linux/completion.h>
  12 #include <linux/compiler.h>
  13
  14 #include <linux/atomic.h>
  15 #include <linux/netdevice.h>
  16
  17 #include <rdma/ib_verbs.h>
  18 #include <rdma/ib_mad.h>
  19 #include <rdma/ib_addr.h>
  20 #include <rdma/opa_addr.h>
  21
  22 enum {
  23         IB_SA_CLASS_VERSION             = 2,    /* IB spec version 1.1/1.2 */
  24
  25         IB_SA_METHOD_GET_TABLE          = 0x12,
  26         IB_SA_METHOD_GET_TABLE_RESP     = 0x92,
  27         IB_SA_METHOD_DELETE             = 0x15,
  28         IB_SA_METHOD_DELETE_RESP        = 0x95,
  29         IB_SA_METHOD_GET_MULTI          = 0x14,
  30         IB_SA_METHOD_GET_MULTI_RESP     = 0x94,
  31         IB_SA_METHOD_GET_TRACE_TBL      = 0x13
  32 };
  33
  34 #define OPA_SA_CLASS_VERSION    0x80
  35 enum {
  36         IB_SA_ATTR_CLASS_PORTINFO    = 0x01,
  37         IB_SA_ATTR_NOTICE            = 0x02,
  38         IB_SA_ATTR_INFORM_INFO       = 0x03,
  39         IB_SA_ATTR_NODE_REC          = 0x11,
  40         IB_SA_ATTR_PORT_INFO_REC     = 0x12,
  41         IB_SA_ATTR_SL2VL_REC         = 0x13,
  42         IB_SA_ATTR_SWITCH_REC        = 0x14,
  43         IB_SA_ATTR_LINEAR_FDB_REC    = 0x15,
  44         IB_SA_ATTR_RANDOM_FDB_REC    = 0x16,
  45         IB_SA_ATTR_MCAST_FDB_REC     = 0x17,
  46         IB_SA_ATTR_SM_INFO_REC       = 0x18,
  47         IB_SA_ATTR_LINK_REC          = 0x20,
  48         IB_SA_ATTR_GUID_INFO_REC     = 0x30,
  49         IB_SA_ATTR_SERVICE_REC       = 0x31,
  50         IB_SA_ATTR_PARTITION_REC     = 0x33,
  51         IB_SA_ATTR_PATH_REC          = 0x35,
  52         IB_SA_ATTR_VL_ARB_REC        = 0x36,
  53         IB_SA_ATTR_MC_MEMBER_REC     = 0x38,
  54         IB_SA_ATTR_TRACE_REC         = 0x39,
  55         IB_SA_ATTR_MULTI_PATH_REC    = 0x3a,
  56         IB_SA_ATTR_SERVICE_ASSOC_REC = 0x3b,
  57         IB_SA_ATTR_INFORM_INFO_REC   = 0xf3
  58 };
  59
  60 enum ib_sa_selector {
  61         IB_SA_GT   = 0,
  62         IB_SA_LT   = 1,
  63         IB_SA_EQ   = 2,
  64         /*
  65          * The meaning of "best" depends on the attribute: for
  66          * example, for MTU best will return the largest available
  67          * MTU, while for packet life time, best will return the
  68          * smallest available life time.
  69          */
  70         IB_SA_BEST = 3
  71 };
  72
  73 /*
  74  * There are 4 types of join states:
  75  * FullMember, NonMember, SendOnlyNonMember, SendOnlyFullMember.
  76  * The order corresponds to JoinState bits in MCMemberRecord.
  77  */
  78 enum ib_sa_mc_join_states {
  79         FULLMEMBER_JOIN,
  80         NONMEMBER_JOIN,
  81         SENDONLY_NONMEBER_JOIN,
  82         SENDONLY_FULLMEMBER_JOIN,
  83         NUM_JOIN_MEMBERSHIP_TYPES,
  84 };
  85
  86 #define IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT       BIT(12)
  87
  88 /*
  89  * Structures for SA records are named "struct ib_sa_xxx_rec."  No
  90  * attempt is made to pack structures to match the physical layout of
  91  * SA records in SA MADs; all packing and unpacking is handled by the
  92  * SA query code.
  93  *
  94  * For a record with structure ib_sa_xxx_rec, the naming convention
  95  * for the component mask value for field yyy is IB_SA_XXX_REC_YYY (we
  96  * never use different abbreviations or otherwise change the spelling
  97  * of xxx/yyy between ib_sa_xxx_rec.yyy and IB_SA_XXX_REC_YYY).
  98  *
  99  * Reserved rows are indicated with comments to help maintainability.
 100  */
 101
 102 #define IB_SA_PATH_REC_SERVICE_ID                      (IB_SA_COMP_MASK( 0) |\
 103                                                         IB_SA_COMP_MASK( 1))
 104 #define IB_SA_PATH_REC_DGID                             IB_SA_COMP_MASK( 2)
 105 #define IB_SA_PATH_REC_SGID                             IB_SA_COMP_MASK( 3)
 106 #define IB_SA_PATH_REC_DLID                             IB_SA_COMP_MASK( 4)
 107 #define IB_SA_PATH_REC_SLID                             IB_SA_COMP_MASK( 5)
 108 #define IB_SA_PATH_REC_RAW_TRAFFIC                      IB_SA_COMP_MASK( 6)
 109 /* reserved:                                                             7 */
 110 #define IB_SA_PATH_REC_FLOW_LABEL                       IB_SA_COMP_MASK( 8)
 111 #define IB_SA_PATH_REC_HOP_LIMIT                        IB_SA_COMP_MASK( 9)
 112 #define IB_SA_PATH_REC_TRAFFIC_CLASS                    IB_SA_COMP_MASK(10)
 113 #define IB_SA_PATH_REC_REVERSIBLE                       IB_SA_COMP_MASK(11)
 114 #define IB_SA_PATH_REC_NUMB_PATH                        IB_SA_COMP_MASK(12)
 115 #define IB_SA_PATH_REC_PKEY                             IB_SA_COMP_MASK(13)
 116 #define IB_SA_PATH_REC_QOS_CLASS                        IB_SA_COMP_MASK(14)
 117 #define IB_SA_PATH_REC_SL                               IB_SA_COMP_MASK(15)
 118 #define IB_SA_PATH_REC_MTU_SELECTOR                     IB_SA_COMP_MASK(16)
 119 #define IB_SA_PATH_REC_MTU                              IB_SA_COMP_MASK(17)
 120 #define IB_SA_PATH_REC_RATE_SELECTOR                    IB_SA_COMP_MASK(18)
 121 #define IB_SA_PATH_REC_RATE                             IB_SA_COMP_MASK(19)
 122 #define IB_SA_PATH_REC_PACKET_LIFE_TIME_SELECTOR        IB_SA_COMP_MASK(20)
 123 #define IB_SA_PATH_REC_PACKET_LIFE_TIME                 IB_SA_COMP_MASK(21)
 124 #define IB_SA_PATH_REC_PREFERENCE                       IB_SA_COMP_MASK(22)
 125
 126 enum sa_path_rec_type {
 127         SA_PATH_REC_TYPE_IB,
 128         SA_PATH_REC_TYPE_ROCE_V1,
 129         SA_PATH_REC_TYPE_ROCE_V2,
 130         SA_PATH_REC_TYPE_OPA
 131 };
 132
 133 struct sa_path_rec_ib {
 134         __be16       dlid;
 135         __be16       slid;
 136         u8           raw_traffic;
 137 };
 138
 139 /**
 140  * struct sa_path_rec_roce - RoCE specific portion of the path record entry
 141  * @route_resolved:     When set, it indicates that this route is already
 142  *                      resolved for this path record entry.
 143  * @dmac:               Destination mac address for the given DGID entry
 144  *                      of the path record entry.
 145  */
 146 struct sa_path_rec_roce {
 147         bool    route_resolved;
 148         u8      dmac[ETH_ALEN];
 149 };
 150
 151 struct sa_path_rec_opa {
 152         __be32       dlid;
 153         __be32       slid;
 154         u8           raw_traffic;
 155         u8           l2_8B;
 156         u8           l2_10B;
 157         u8           l2_9B;
 158         u8           l2_16B;
 159         u8           qos_type;
 160         u8           qos_priority;
 161 };
 162
 163 struct sa_path_rec {
 164         union ib_gid dgid;
 165         union ib_gid sgid;
 166         __be64       service_id;
 167         /* reserved */
 168         __be32       flow_label;
 169         u8           hop_limit;
 170         u8           traffic_class;
 171         u8           reversible;
 172         u8           numb_path;
 173         __be16       pkey;
 174         __be16       qos_class;
 175         u8           sl;
 176         u8           mtu_selector;
 177         u8           mtu;
 178         u8           rate_selector;
 179         u8           rate;
 180         u8           packet_life_time_selector;
 181         u8           packet_life_time;
 182         u8           preference;
 183         union {
 184                 struct sa_path_rec_ib ib;
 185                 struct sa_path_rec_roce roce;
 186                 struct sa_path_rec_opa opa;
 187         };
 188         enum sa_path_rec_type rec_type;
 189 };
 190
 191 static inline enum ib_gid_type
 192                 sa_conv_pathrec_to_gid_type(struct sa_path_rec *rec)
 193 {
 194         switch (rec->rec_type) {
 195         case SA_PATH_REC_TYPE_ROCE_V1:
 196                 return IB_GID_TYPE_ROCE;
 197         case SA_PATH_REC_TYPE_ROCE_V2:
 198                 return IB_GID_TYPE_ROCE_UDP_ENCAP;
 199         default:
 200                 return IB_GID_TYPE_IB;
 201         }
 202 }
 203
 204 static inline enum sa_path_rec_type
 205                 sa_conv_gid_to_pathrec_type(enum ib_gid_type type)
 206 {
 207         switch (type) {
 208         case IB_GID_TYPE_ROCE:
 209                 return SA_PATH_REC_TYPE_ROCE_V1;
 210         case IB_GID_TYPE_ROCE_UDP_ENCAP:
 211                 return SA_PATH_REC_TYPE_ROCE_V2;
 212         default:
 213                 return SA_PATH_REC_TYPE_IB;
 214         }
 215 }
 216
 217 static inline void path_conv_opa_to_ib(struct sa_path_rec *ib,
 218                                        struct sa_path_rec *opa)
 219 {
 220         if ((be32_to_cpu(opa->opa.dlid) >=
 221              be16_to_cpu(IB_MULTICAST_LID_BASE)) ||
 222             (be32_to_cpu(opa->opa.slid) >=
 223              be16_to_cpu(IB_MULTICAST_LID_BASE))) {
 224                 /* Create OPA GID and zero out the LID */
 225                 ib->dgid.global.interface_id
 226                                 = OPA_MAKE_ID(be32_to_cpu(opa->opa.dlid));
 227                 ib->dgid.global.subnet_prefix
 228                                 = opa->dgid.global.subnet_prefix;
 229                 ib->sgid.global.interface_id
 230                                 = OPA_MAKE_ID(be32_to_cpu(opa->opa.slid));
 231                 ib->dgid.global.subnet_prefix
 232                                 = opa->dgid.global.subnet_prefix;
 233                 ib->ib.dlid     = 0;
 234
 235                 ib->ib.slid     = 0;
 236         } else {
 237                 ib->ib.dlid     = htons(ntohl(opa->opa.dlid));
 238                 ib->ib.slid     = htons(ntohl(opa->opa.slid));
 239         }
 240         ib->service_id          = opa->service_id;
 241         ib->ib.raw_traffic      = opa->opa.raw_traffic;
 242 }
 243
 244 static inline void path_conv_ib_to_opa(struct sa_path_rec *opa,
 245                                        struct sa_path_rec *ib)
 246 {
 247         __be32 slid, dlid;
 248
 249         if ((ib_is_opa_gid(&ib->sgid)) ||
 250             (ib_is_opa_gid(&ib->dgid))) {
 251                 slid = htonl(opa_get_lid_from_gid(&ib->sgid));
 252                 dlid = htonl(opa_get_lid_from_gid(&ib->dgid));
 253         } else {
 254                 slid = htonl(ntohs(ib->ib.slid));
 255                 dlid = htonl(ntohs(ib->ib.dlid));
 256         }
 257         opa->opa.slid           = slid;
 258         opa->opa.dlid           = dlid;
 259         opa->service_id         = ib->service_id;
 260         opa->opa.raw_traffic    = ib->ib.raw_traffic;
 261 }
 262
 263 /* Convert from OPA to IB path record */
 264 static inline void sa_convert_path_opa_to_ib(struct sa_path_rec *dest,
 265                                              struct sa_path_rec *src)
 266 {
 267         if (src->rec_type != SA_PATH_REC_TYPE_OPA)
 268                 return;
 269
 270         *dest = *src;
 271         dest->rec_type = SA_PATH_REC_TYPE_IB;
 272         path_conv_opa_to_ib(dest, src);
 273 }
 274
 275 /* Convert from IB to OPA path record */
 276 static inline void sa_convert_path_ib_to_opa(struct sa_path_rec *dest,
 277                                              struct sa_path_rec *src)
 278 {
 279         if (src->rec_type != SA_PATH_REC_TYPE_IB)
 280                 return;
 281
 282         /* Do a structure copy and overwrite the relevant fields */
 283         *dest = *src;
 284         dest->rec_type = SA_PATH_REC_TYPE_OPA;
 285         path_conv_ib_to_opa(dest, src);
 286 }
 287
 288 #define IB_SA_MCMEMBER_REC_MGID                         IB_SA_COMP_MASK( 0)
 289 #define IB_SA_MCMEMBER_REC_PORT_GID                     IB_SA_COMP_MASK( 1)
 290 #define IB_SA_MCMEMBER_REC_QKEY                         IB_SA_COMP_MASK( 2)
 291 #define IB_SA_MCMEMBER_REC_MLID                         IB_SA_COMP_MASK( 3)
 292 #define IB_SA_MCMEMBER_REC_MTU_SELECTOR                 IB_SA_COMP_MASK( 4)
 293 #define IB_SA_MCMEMBER_REC_MTU                          IB_SA_COMP_MASK( 5)
 294 #define IB_SA_MCMEMBER_REC_TRAFFIC_CLASS                IB_SA_COMP_MASK( 6)
 295 #define IB_SA_MCMEMBER_REC_PKEY                         IB_SA_COMP_MASK( 7)
 296 #define IB_SA_MCMEMBER_REC_RATE_SELECTOR                IB_SA_COMP_MASK( 8)
 297 #define IB_SA_MCMEMBER_REC_RATE                         IB_SA_COMP_MASK( 9)
 298 #define IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME_SELECTOR    IB_SA_COMP_MASK(10)
 299 #define IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME             IB_SA_COMP_MASK(11)
 300 #define IB_SA_MCMEMBER_REC_SL                           IB_SA_COMP_MASK(12)
 301 #define IB_SA_MCMEMBER_REC_FLOW_LABEL                   IB_SA_COMP_MASK(13)
 302 #define IB_SA_MCMEMBER_REC_HOP_LIMIT                    IB_SA_COMP_MASK(14)
 303 #define IB_SA_MCMEMBER_REC_SCOPE                        IB_SA_COMP_MASK(15)
 304 #define IB_SA_MCMEMBER_REC_JOIN_STATE                   IB_SA_COMP_MASK(16)
 305 #define IB_SA_MCMEMBER_REC_PROXY_JOIN                   IB_SA_COMP_MASK(17)
 306
 307 struct ib_sa_mcmember_rec {
 308         union ib_gid mgid;
 309         union ib_gid port_gid;
 310         __be32       qkey;
 311         __be16       mlid;
 312         u8           mtu_selector;
 313         u8           mtu;
 314         u8           traffic_class;
 315         __be16       pkey;
 316         u8           rate_selector;
 317         u8           rate;
 318         u8           packet_life_time_selector;
 319         u8           packet_life_time;
 320         u8           sl;
 321         __be32       flow_label;
 322         u8           hop_limit;
 323         u8           scope;
 324         u8           join_state;
 325         u8           proxy_join;
 326 };
 327
 328 /* Service Record Component Mask Sec 15.2.5.14 Ver 1.1  */
 329 #define IB_SA_SERVICE_REC_SERVICE_ID                    IB_SA_COMP_MASK( 0)
 330 #define IB_SA_SERVICE_REC_SERVICE_GID                   IB_SA_COMP_MASK( 1)
 331 #define IB_SA_SERVICE_REC_SERVICE_PKEY                  IB_SA_COMP_MASK( 2)
 332 /* reserved:                                                             3 */
 333 #define IB_SA_SERVICE_REC_SERVICE_LEASE                 IB_SA_COMP_MASK( 4)
 334 #define IB_SA_SERVICE_REC_SERVICE_KEY                   IB_SA_COMP_MASK( 5)
 335 #define IB_SA_SERVICE_REC_SERVICE_NAME                  IB_SA_COMP_MASK( 6)
 336 #define IB_SA_SERVICE_REC_SERVICE_DATA8_0               IB_SA_COMP_MASK( 7)
 337 #define IB_SA_SERVICE_REC_SERVICE_DATA8_1               IB_SA_COMP_MASK( 8)
 338 #define IB_SA_SERVICE_REC_SERVICE_DATA8_2               IB_SA_COMP_MASK( 9)
 339 #define IB_SA_SERVICE_REC_SERVICE_DATA8_3               IB_SA_COMP_MASK(10)
 340 #define IB_SA_SERVICE_REC_SERVICE_DATA8_4               IB_SA_COMP_MASK(11)
 341 #define IB_SA_SERVICE_REC_SERVICE_DATA8_5               IB_SA_COMP_MASK(12)
 342 #define IB_SA_SERVICE_REC_SERVICE_DATA8_6               IB_SA_COMP_MASK(13)
 343 #define IB_SA_SERVICE_REC_SERVICE_DATA8_7               IB_SA_COMP_MASK(14)
 344 #define IB_SA_SERVICE_REC_SERVICE_DATA8_8               IB_SA_COMP_MASK(15)
 345 #define IB_SA_SERVICE_REC_SERVICE_DATA8_9               IB_SA_COMP_MASK(16)
 346 #define IB_SA_SERVICE_REC_SERVICE_DATA8_10              IB_SA_COMP_MASK(17)
 347 #define IB_SA_SERVICE_REC_SERVICE_DATA8_11              IB_SA_COMP_MASK(18)
 348 #define IB_SA_SERVICE_REC_SERVICE_DATA8_12              IB_SA_COMP_MASK(19)
 349 #define IB_SA_SERVICE_REC_SERVICE_DATA8_13              IB_SA_COMP_MASK(20)
 350 #define IB_SA_SERVICE_REC_SERVICE_DATA8_14              IB_SA_COMP_MASK(21)
 351 #define IB_SA_SERVICE_REC_SERVICE_DATA8_15              IB_SA_COMP_MASK(22)
 352 #define IB_SA_SERVICE_REC_SERVICE_DATA16_0              IB_SA_COMP_MASK(23)
 353 #define IB_SA_SERVICE_REC_SERVICE_DATA16_1              IB_SA_COMP_MASK(24)
 354 #define IB_SA_SERVICE_REC_SERVICE_DATA16_2              IB_SA_COMP_MASK(25)
 355 #define IB_SA_SERVICE_REC_SERVICE_DATA16_3              IB_SA_COMP_MASK(26)
 356 #define IB_SA_SERVICE_REC_SERVICE_DATA16_4              IB_SA_COMP_MASK(27)
 357 #define IB_SA_SERVICE_REC_SERVICE_DATA16_5              IB_SA_COMP_MASK(28)
 358 #define IB_SA_SERVICE_REC_SERVICE_DATA16_6              IB_SA_COMP_MASK(29)
 359 #define IB_SA_SERVICE_REC_SERVICE_DATA16_7              IB_SA_COMP_MASK(30)
 360 #define IB_SA_SERVICE_REC_SERVICE_DATA32_0              IB_SA_COMP_MASK(31)
 361 #define IB_SA_SERVICE_REC_SERVICE_DATA32_1              IB_SA_COMP_MASK(32)
 362 #define IB_SA_SERVICE_REC_SERVICE_DATA32_2              IB_SA_COMP_MASK(33)
 363 #define IB_SA_SERVICE_REC_SERVICE_DATA32_3              IB_SA_COMP_MASK(34)
 364 #define IB_SA_SERVICE_REC_SERVICE_DATA64_0              IB_SA_COMP_MASK(35)
 365 #define IB_SA_SERVICE_REC_SERVICE_DATA64_1              IB_SA_COMP_MASK(36)
 366
 367 #define IB_DEFAULT_SERVICE_LEASE        0xFFFFFFFF
 368
 369 #define IB_SA_GUIDINFO_REC_LID          IB_SA_COMP_MASK(0)
 370 #define IB_SA_GUIDINFO_REC_BLOCK_NUM    IB_SA_COMP_MASK(1)
 371 #define IB_SA_GUIDINFO_REC_RES1         IB_SA_COMP_MASK(2)
 372 #define IB_SA_GUIDINFO_REC_RES2         IB_SA_COMP_MASK(3)
 373 #define IB_SA_GUIDINFO_REC_GID0         IB_SA_COMP_MASK(4)
 374 #define IB_SA_GUIDINFO_REC_GID1         IB_SA_COMP_MASK(5)
 375 #define IB_SA_GUIDINFO_REC_GID2         IB_SA_COMP_MASK(6)
 376 #define IB_SA_GUIDINFO_REC_GID3         IB_SA_COMP_MASK(7)
 377 #define IB_SA_GUIDINFO_REC_GID4         IB_SA_COMP_MASK(8)
 378 #define IB_SA_GUIDINFO_REC_GID5         IB_SA_COMP_MASK(9)
 379 #define IB_SA_GUIDINFO_REC_GID6         IB_SA_COMP_MASK(10)
 380 #define IB_SA_GUIDINFO_REC_GID7         IB_SA_COMP_MASK(11)
 381
 382 struct ib_sa_guidinfo_rec {
 383         __be16  lid;
 384         u8      block_num;
 385         /* reserved */
 386         u8      res1;
 387         __be32  res2;
 388         u8      guid_info_list[64];
 389 };
 390
 391 struct ib_sa_client {
 392         atomic_t users;
 393         struct completion comp;
 394 };
 395
 396 /**
 397  * ib_sa_register_client - Register an SA client.
 398  */
 399 void ib_sa_register_client(struct ib_sa_client *client);
 400
 401 /**
 402  * ib_sa_unregister_client - Deregister an SA client.
 403  * @client: Client object to deregister.
 404  */
 405 void ib_sa_unregister_client(struct ib_sa_client *client);
 406
 407 struct ib_sa_query;
 408
 409 void ib_sa_cancel_query(int id, struct ib_sa_query *query);
 410
 411 int ib_sa_path_rec_get(struct ib_sa_client *client, struct ib_device *device,
 412                        u32 port_num, struct sa_path_rec *rec,
 413                        ib_sa_comp_mask comp_mask, unsigned long timeout_ms,
 414                        gfp_t gfp_mask,
 415                        void (*callback)(int status, struct sa_path_rec *resp,
 416                                         void *context),
 417                        void *context, struct ib_sa_query **query);
 418
 419 struct ib_sa_multicast {
 420         struct ib_sa_mcmember_rec rec;
 421         ib_sa_comp_mask         comp_mask;
 422         int                     (*callback)(int status,
 423                                             struct ib_sa_multicast *multicast);
 424         void                    *context;
 425 };
 426
 427 /**
 428  * ib_sa_join_multicast - Initiates a join request to the specified multicast
 429  *   group.
 430  * @client: SA client
 431  * @device: Device associated with the multicast group.
 432  * @port_num: Port on the specified device to associate with the multicast
 433  *   group.
 434  * @rec: SA multicast member record specifying group attributes.
 435  * @comp_mask: Component mask indicating which group attributes of %rec are
 436  *   valid.
 437  * @gfp_mask: GFP mask for memory allocations.
 438  * @callback: User callback invoked once the join operation completes.
 439  * @context: User specified context stored with the ib_sa_multicast structure.
 440  *
 441  * This call initiates a multicast join request with the SA for the specified
 442  * multicast group.  If the join operation is started successfully, it returns
 443  * an ib_sa_multicast structure that is used to track the multicast operation.
 444  * Users must free this structure by calling ib_free_multicast, even if the
 445  * join operation later fails.  (The callback status is non-zero.)
 446  *
 447  * If the join operation fails; status will be non-zero, with the following
 448  * failures possible:
 449  * -ETIMEDOUT: The request timed out.
 450  * -EIO: An error occurred sending the query.
 451  * -EINVAL: The MCMemberRecord values differed from the existing group's.
 452  * -ENETRESET: Indicates that an fatal error has occurred on the multicast
 453  *   group, and the user must rejoin the group to continue using it.
 454  */
 455 struct ib_sa_multicast *ib_sa_join_multicast(struct ib_sa_client *client,
 456                                              struct ib_device *device,
 457                                              u32 port_num,
 458                                              struct ib_sa_mcmember_rec *rec,
 459                                              ib_sa_comp_mask comp_mask, gfp_t gfp_mask,
 460                                              int (*callback)(int status,
 461                                                              struct ib_sa_multicast
 462                                                                     *multicast),
 463                                              void *context);
 464
 465 /**
 466  * ib_free_multicast - Frees the multicast tracking structure, and releases
 467  *    any reference on the multicast group.
 468  * @multicast: Multicast tracking structure allocated by ib_join_multicast.
 469  *
 470  * This call blocks until the multicast identifier is destroyed.  It may
 471  * not be called from within the multicast callback; however, returning a non-
 472  * zero value from the callback will result in destroying the multicast
 473  * tracking structure.
 474  */
 475 void ib_sa_free_multicast(struct ib_sa_multicast *multicast);
 476
 477 /**
 478  * ib_get_mcmember_rec - Looks up a multicast member record by its MGID and
 479  *   returns it if found.
 480  * @device: Device associated with the multicast group.
 481  * @port_num: Port on the specified device to associate with the multicast
 482  *   group.
 483  * @mgid: MGID of multicast group.
 484  * @rec: Location to copy SA multicast member record.
 485  */
 486 int ib_sa_get_mcmember_rec(struct ib_device *device, u32 port_num,
 487                            union ib_gid *mgid, struct ib_sa_mcmember_rec *rec);
 488
 489 /**
 490  * ib_init_ah_from_mcmember - Initialize address handle attributes based on
 491  * an SA multicast member record.
 492  */
 493 int ib_init_ah_from_mcmember(struct ib_device *device, u32 port_num,
 494                              struct ib_sa_mcmember_rec *rec,
 495                              struct net_device *ndev,
 496                              enum ib_gid_type gid_type,
 497                              struct rdma_ah_attr *ah_attr);
 498
 499 int ib_init_ah_attr_from_path(struct ib_device *device, u32 port_num,
 500                               struct sa_path_rec *rec,
 501                               struct rdma_ah_attr *ah_attr,
 502                               const struct ib_gid_attr *sgid_attr);
 503
 504 /**
 505  * ib_sa_pack_path - Conert a path record from struct ib_sa_path_rec
 506  * to IB MAD wire format.
 507  */
 508 void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute);
 509
 510 /**
 511  * ib_sa_unpack_path - Convert a path record from MAD format to struct
 512  * ib_sa_path_rec.
 513  */
 514 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec);
 515
 516 /* Support GuidInfoRecord */
 517 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
 518                               struct ib_device *device, u32 port_num,
 519                               struct ib_sa_guidinfo_rec *rec,
 520                               ib_sa_comp_mask comp_mask, u8 method,
 521                               unsigned long timeout_ms, gfp_t gfp_mask,
 522                               void (*callback)(int status,
 523                                                struct ib_sa_guidinfo_rec *resp,
 524                                                void *context),
 525                               void *context, struct ib_sa_query **sa_query);
 526
 527 static inline bool sa_path_is_roce(struct sa_path_rec *rec)
 528 {
 529         return ((rec->rec_type == SA_PATH_REC_TYPE_ROCE_V1) ||
 530                 (rec->rec_type == SA_PATH_REC_TYPE_ROCE_V2));
 531 }
 532
 533 static inline bool sa_path_is_opa(struct sa_path_rec *rec)
 534 {
 535         return (rec->rec_type == SA_PATH_REC_TYPE_OPA);
 536 }
 537
 538 static inline void sa_path_set_slid(struct sa_path_rec *rec, u32 slid)
 539 {
 540         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
 541                 rec->ib.slid = cpu_to_be16(slid);
 542         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
 543                 rec->opa.slid = cpu_to_be32(slid);
 544 }
 545
 546 static inline void sa_path_set_dlid(struct sa_path_rec *rec, u32 dlid)
 547 {
 548         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
 549                 rec->ib.dlid = cpu_to_be16(dlid);
 550         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
 551                 rec->opa.dlid = cpu_to_be32(dlid);
 552 }
 553
 554 static inline void sa_path_set_raw_traffic(struct sa_path_rec *rec,
 555                                            u8 raw_traffic)
 556 {
 557         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
 558                 rec->ib.raw_traffic = raw_traffic;
 559         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
 560                 rec->opa.raw_traffic = raw_traffic;
 561 }
 562
 563 static inline __be32 sa_path_get_slid(struct sa_path_rec *rec)
 564 {
 565         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
 566                 return htonl(ntohs(rec->ib.slid));
 567         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
 568                 return rec->opa.slid;
 569         return 0;
 570 }
 571
 572 static inline __be32 sa_path_get_dlid(struct sa_path_rec *rec)
 573 {
 574         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
 575                 return htonl(ntohs(rec->ib.dlid));
 576         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
 577                 return rec->opa.dlid;
 578         return 0;
 579 }
 580
 581 static inline u8 sa_path_get_raw_traffic(struct sa_path_rec *rec)
 582 {
 583         if (rec->rec_type == SA_PATH_REC_TYPE_IB)
 584                 return rec->ib.raw_traffic;
 585         else if (rec->rec_type == SA_PATH_REC_TYPE_OPA)
 586                 return rec->opa.raw_traffic;
 587         return 0;
 588 }
 589
 590 static inline void sa_path_set_dmac(struct sa_path_rec *rec, u8 *dmac)
 591 {
 592         if (sa_path_is_roce(rec))
 593                 memcpy(rec->roce.dmac, dmac, ETH_ALEN);
 594 }
 595
 596 static inline void sa_path_set_dmac_zero(struct sa_path_rec *rec)
 597 {
 598         if (sa_path_is_roce(rec))
 599                 eth_zero_addr(rec->roce.dmac);
 600 }
 601
 602 static inline u8 *sa_path_get_dmac(struct sa_path_rec *rec)
 603 {
 604         if (sa_path_is_roce(rec))
 605                 return rec->roce.dmac;
 606         return NULL;
 607 }
 608 #endif /* IB_SA_H */