linux/include/rdma/ib_sa.h
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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
  43#include <rdma/ib_verbs.h>
  44#include <rdma/ib_mad.h>
  45
  46enum {
  47        IB_SA_CLASS_VERSION             = 2,    /* IB spec version 1.1/1.2 */
  48
  49        IB_SA_METHOD_GET_TABLE          = 0x12,
  50        IB_SA_METHOD_GET_TABLE_RESP     = 0x92,
  51        IB_SA_METHOD_DELETE             = 0x15,
  52        IB_SA_METHOD_DELETE_RESP        = 0x95,
  53        IB_SA_METHOD_GET_MULTI          = 0x14,
  54        IB_SA_METHOD_GET_MULTI_RESP     = 0x94,
  55        IB_SA_METHOD_GET_TRACE_TBL      = 0x13
  56};
  57
  58enum {
  59        IB_SA_ATTR_CLASS_PORTINFO    = 0x01,
  60        IB_SA_ATTR_NOTICE            = 0x02,
  61        IB_SA_ATTR_INFORM_INFO       = 0x03,
  62        IB_SA_ATTR_NODE_REC          = 0x11,
  63        IB_SA_ATTR_PORT_INFO_REC     = 0x12,
  64        IB_SA_ATTR_SL2VL_REC         = 0x13,
  65        IB_SA_ATTR_SWITCH_REC        = 0x14,
  66        IB_SA_ATTR_LINEAR_FDB_REC    = 0x15,
  67        IB_SA_ATTR_RANDOM_FDB_REC    = 0x16,
  68        IB_SA_ATTR_MCAST_FDB_REC     = 0x17,
  69        IB_SA_ATTR_SM_INFO_REC       = 0x18,
  70        IB_SA_ATTR_LINK_REC          = 0x20,
  71        IB_SA_ATTR_GUID_INFO_REC     = 0x30,
  72        IB_SA_ATTR_SERVICE_REC       = 0x31,
  73        IB_SA_ATTR_PARTITION_REC     = 0x33,
  74        IB_SA_ATTR_PATH_REC          = 0x35,
  75        IB_SA_ATTR_VL_ARB_REC        = 0x36,
  76        IB_SA_ATTR_MC_MEMBER_REC     = 0x38,
  77        IB_SA_ATTR_TRACE_REC         = 0x39,
  78        IB_SA_ATTR_MULTI_PATH_REC    = 0x3a,
  79        IB_SA_ATTR_SERVICE_ASSOC_REC = 0x3b,
  80        IB_SA_ATTR_INFORM_INFO_REC   = 0xf3
  81};
  82
  83enum ib_sa_selector {
  84        IB_SA_GT   = 0,
  85        IB_SA_LT   = 1,
  86        IB_SA_EQ   = 2,
  87        /*
  88         * The meaning of "best" depends on the attribute: for
  89         * example, for MTU best will return the largest available
  90         * MTU, while for packet life time, best will return the
  91         * smallest available life time.
  92         */
  93        IB_SA_BEST = 3
  94};
  95
  96/*
  97 * Structures for SA records are named "struct ib_sa_xxx_rec."  No
  98 * attempt is made to pack structures to match the physical layout of
  99 * SA records in SA MADs; all packing and unpacking is handled by the
 100 * SA query code.
 101 *
 102 * For a record with structure ib_sa_xxx_rec, the naming convention
 103 * for the component mask value for field yyy is IB_SA_XXX_REC_YYY (we
 104 * never use different abbreviations or otherwise change the spelling
 105 * of xxx/yyy between ib_sa_xxx_rec.yyy and IB_SA_XXX_REC_YYY).
 106 *
 107 * Reserved rows are indicated with comments to help maintainability.
 108 */
 109
 110#define IB_SA_PATH_REC_SERVICE_ID                      (IB_SA_COMP_MASK( 0) |\
 111                                                        IB_SA_COMP_MASK( 1))
 112#define IB_SA_PATH_REC_DGID                             IB_SA_COMP_MASK( 2)
 113#define IB_SA_PATH_REC_SGID                             IB_SA_COMP_MASK( 3)
 114#define IB_SA_PATH_REC_DLID                             IB_SA_COMP_MASK( 4)
 115#define IB_SA_PATH_REC_SLID                             IB_SA_COMP_MASK( 5)
 116#define IB_SA_PATH_REC_RAW_TRAFFIC                      IB_SA_COMP_MASK( 6)
 117/* reserved:                                                             7 */
 118#define IB_SA_PATH_REC_FLOW_LABEL                       IB_SA_COMP_MASK( 8)
 119#define IB_SA_PATH_REC_HOP_LIMIT                        IB_SA_COMP_MASK( 9)
 120#define IB_SA_PATH_REC_TRAFFIC_CLASS                    IB_SA_COMP_MASK(10)
 121#define IB_SA_PATH_REC_REVERSIBLE                       IB_SA_COMP_MASK(11)
 122#define IB_SA_PATH_REC_NUMB_PATH                        IB_SA_COMP_MASK(12)
 123#define IB_SA_PATH_REC_PKEY                             IB_SA_COMP_MASK(13)
 124#define IB_SA_PATH_REC_QOS_CLASS                        IB_SA_COMP_MASK(14)
 125#define IB_SA_PATH_REC_SL                               IB_SA_COMP_MASK(15)
 126#define IB_SA_PATH_REC_MTU_SELECTOR                     IB_SA_COMP_MASK(16)
 127#define IB_SA_PATH_REC_MTU                              IB_SA_COMP_MASK(17)
 128#define IB_SA_PATH_REC_RATE_SELECTOR                    IB_SA_COMP_MASK(18)
 129#define IB_SA_PATH_REC_RATE                             IB_SA_COMP_MASK(19)
 130#define IB_SA_PATH_REC_PACKET_LIFE_TIME_SELECTOR        IB_SA_COMP_MASK(20)
 131#define IB_SA_PATH_REC_PACKET_LIFE_TIME                 IB_SA_COMP_MASK(21)
 132#define IB_SA_PATH_REC_PREFERENCE                       IB_SA_COMP_MASK(22)
 133
 134struct ib_sa_path_rec {
 135        __be64       service_id;
 136        union ib_gid dgid;
 137        union ib_gid sgid;
 138        __be16       dlid;
 139        __be16       slid;
 140        int          raw_traffic;
 141        /* reserved */
 142        __be32       flow_label;
 143        u8           hop_limit;
 144        u8           traffic_class;
 145        int          reversible;
 146        u8           numb_path;
 147        __be16       pkey;
 148        __be16       qos_class;
 149        u8           sl;
 150        u8           mtu_selector;
 151        u8           mtu;
 152        u8           rate_selector;
 153        u8           rate;
 154        u8           packet_life_time_selector;
 155        u8           packet_life_time;
 156        u8           preference;
 157};
 158
 159#define IB_SA_MCMEMBER_REC_MGID                         IB_SA_COMP_MASK( 0)
 160#define IB_SA_MCMEMBER_REC_PORT_GID                     IB_SA_COMP_MASK( 1)
 161#define IB_SA_MCMEMBER_REC_QKEY                         IB_SA_COMP_MASK( 2)
 162#define IB_SA_MCMEMBER_REC_MLID                         IB_SA_COMP_MASK( 3)
 163#define IB_SA_MCMEMBER_REC_MTU_SELECTOR                 IB_SA_COMP_MASK( 4)
 164#define IB_SA_MCMEMBER_REC_MTU                          IB_SA_COMP_MASK( 5)
 165#define IB_SA_MCMEMBER_REC_TRAFFIC_CLASS                IB_SA_COMP_MASK( 6)
 166#define IB_SA_MCMEMBER_REC_PKEY                         IB_SA_COMP_MASK( 7)
 167#define IB_SA_MCMEMBER_REC_RATE_SELECTOR                IB_SA_COMP_MASK( 8)
 168#define IB_SA_MCMEMBER_REC_RATE                         IB_SA_COMP_MASK( 9)
 169#define IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME_SELECTOR    IB_SA_COMP_MASK(10)
 170#define IB_SA_MCMEMBER_REC_PACKET_LIFE_TIME             IB_SA_COMP_MASK(11)
 171#define IB_SA_MCMEMBER_REC_SL                           IB_SA_COMP_MASK(12)
 172#define IB_SA_MCMEMBER_REC_FLOW_LABEL                   IB_SA_COMP_MASK(13)
 173#define IB_SA_MCMEMBER_REC_HOP_LIMIT                    IB_SA_COMP_MASK(14)
 174#define IB_SA_MCMEMBER_REC_SCOPE                        IB_SA_COMP_MASK(15)
 175#define IB_SA_MCMEMBER_REC_JOIN_STATE                   IB_SA_COMP_MASK(16)
 176#define IB_SA_MCMEMBER_REC_PROXY_JOIN                   IB_SA_COMP_MASK(17)
 177
 178struct ib_sa_mcmember_rec {
 179        union ib_gid mgid;
 180        union ib_gid port_gid;
 181        __be32       qkey;
 182        __be16       mlid;
 183        u8           mtu_selector;
 184        u8           mtu;
 185        u8           traffic_class;
 186        __be16       pkey;
 187        u8           rate_selector;
 188        u8           rate;
 189        u8           packet_life_time_selector;
 190        u8           packet_life_time;
 191        u8           sl;
 192        __be32       flow_label;
 193        u8           hop_limit;
 194        u8           scope;
 195        u8           join_state;
 196        int          proxy_join;
 197};
 198
 199/* Service Record Component Mask Sec 15.2.5.14 Ver 1.1  */
 200#define IB_SA_SERVICE_REC_SERVICE_ID                    IB_SA_COMP_MASK( 0)
 201#define IB_SA_SERVICE_REC_SERVICE_GID                   IB_SA_COMP_MASK( 1)
 202#define IB_SA_SERVICE_REC_SERVICE_PKEY                  IB_SA_COMP_MASK( 2)
 203/* reserved:                                                             3 */
 204#define IB_SA_SERVICE_REC_SERVICE_LEASE                 IB_SA_COMP_MASK( 4)
 205#define IB_SA_SERVICE_REC_SERVICE_KEY                   IB_SA_COMP_MASK( 5)
 206#define IB_SA_SERVICE_REC_SERVICE_NAME                  IB_SA_COMP_MASK( 6)
 207#define IB_SA_SERVICE_REC_SERVICE_DATA8_0               IB_SA_COMP_MASK( 7)
 208#define IB_SA_SERVICE_REC_SERVICE_DATA8_1               IB_SA_COMP_MASK( 8)
 209#define IB_SA_SERVICE_REC_SERVICE_DATA8_2               IB_SA_COMP_MASK( 9)
 210#define IB_SA_SERVICE_REC_SERVICE_DATA8_3               IB_SA_COMP_MASK(10)
 211#define IB_SA_SERVICE_REC_SERVICE_DATA8_4               IB_SA_COMP_MASK(11)
 212#define IB_SA_SERVICE_REC_SERVICE_DATA8_5               IB_SA_COMP_MASK(12)
 213#define IB_SA_SERVICE_REC_SERVICE_DATA8_6               IB_SA_COMP_MASK(13)
 214#define IB_SA_SERVICE_REC_SERVICE_DATA8_7               IB_SA_COMP_MASK(14)
 215#define IB_SA_SERVICE_REC_SERVICE_DATA8_8               IB_SA_COMP_MASK(15)
 216#define IB_SA_SERVICE_REC_SERVICE_DATA8_9               IB_SA_COMP_MASK(16)
 217#define IB_SA_SERVICE_REC_SERVICE_DATA8_10              IB_SA_COMP_MASK(17)
 218#define IB_SA_SERVICE_REC_SERVICE_DATA8_11              IB_SA_COMP_MASK(18)
 219#define IB_SA_SERVICE_REC_SERVICE_DATA8_12              IB_SA_COMP_MASK(19)
 220#define IB_SA_SERVICE_REC_SERVICE_DATA8_13              IB_SA_COMP_MASK(20)
 221#define IB_SA_SERVICE_REC_SERVICE_DATA8_14              IB_SA_COMP_MASK(21)
 222#define IB_SA_SERVICE_REC_SERVICE_DATA8_15              IB_SA_COMP_MASK(22)
 223#define IB_SA_SERVICE_REC_SERVICE_DATA16_0              IB_SA_COMP_MASK(23)
 224#define IB_SA_SERVICE_REC_SERVICE_DATA16_1              IB_SA_COMP_MASK(24)
 225#define IB_SA_SERVICE_REC_SERVICE_DATA16_2              IB_SA_COMP_MASK(25)
 226#define IB_SA_SERVICE_REC_SERVICE_DATA16_3              IB_SA_COMP_MASK(26)
 227#define IB_SA_SERVICE_REC_SERVICE_DATA16_4              IB_SA_COMP_MASK(27)
 228#define IB_SA_SERVICE_REC_SERVICE_DATA16_5              IB_SA_COMP_MASK(28)
 229#define IB_SA_SERVICE_REC_SERVICE_DATA16_6              IB_SA_COMP_MASK(29)
 230#define IB_SA_SERVICE_REC_SERVICE_DATA16_7              IB_SA_COMP_MASK(30)
 231#define IB_SA_SERVICE_REC_SERVICE_DATA32_0              IB_SA_COMP_MASK(31)
 232#define IB_SA_SERVICE_REC_SERVICE_DATA32_1              IB_SA_COMP_MASK(32)
 233#define IB_SA_SERVICE_REC_SERVICE_DATA32_2              IB_SA_COMP_MASK(33)
 234#define IB_SA_SERVICE_REC_SERVICE_DATA32_3              IB_SA_COMP_MASK(34)
 235#define IB_SA_SERVICE_REC_SERVICE_DATA64_0              IB_SA_COMP_MASK(35)
 236#define IB_SA_SERVICE_REC_SERVICE_DATA64_1              IB_SA_COMP_MASK(36)
 237
 238#define IB_DEFAULT_SERVICE_LEASE        0xFFFFFFFF
 239
 240struct ib_sa_service_rec {
 241        u64             id;
 242        union ib_gid    gid;
 243        __be16          pkey;
 244        /* reserved */
 245        u32             lease;
 246        u8              key[16];
 247        u8              name[64];
 248        u8              data8[16];
 249        u16             data16[8];
 250        u32             data32[4];
 251        u64             data64[2];
 252};
 253
 254#define IB_SA_GUIDINFO_REC_LID          IB_SA_COMP_MASK(0)
 255#define IB_SA_GUIDINFO_REC_BLOCK_NUM    IB_SA_COMP_MASK(1)
 256#define IB_SA_GUIDINFO_REC_RES1         IB_SA_COMP_MASK(2)
 257#define IB_SA_GUIDINFO_REC_RES2         IB_SA_COMP_MASK(3)
 258#define IB_SA_GUIDINFO_REC_GID0         IB_SA_COMP_MASK(4)
 259#define IB_SA_GUIDINFO_REC_GID1         IB_SA_COMP_MASK(5)
 260#define IB_SA_GUIDINFO_REC_GID2         IB_SA_COMP_MASK(6)
 261#define IB_SA_GUIDINFO_REC_GID3         IB_SA_COMP_MASK(7)
 262#define IB_SA_GUIDINFO_REC_GID4         IB_SA_COMP_MASK(8)
 263#define IB_SA_GUIDINFO_REC_GID5         IB_SA_COMP_MASK(9)
 264#define IB_SA_GUIDINFO_REC_GID6         IB_SA_COMP_MASK(10)
 265#define IB_SA_GUIDINFO_REC_GID7         IB_SA_COMP_MASK(11)
 266
 267struct ib_sa_guidinfo_rec {
 268        __be16  lid;
 269        u8      block_num;
 270        /* reserved */
 271        u8      res1;
 272        __be32  res2;
 273        u8      guid_info_list[64];
 274};
 275
 276struct ib_sa_client {
 277        atomic_t users;
 278        struct completion comp;
 279};
 280
 281/**
 282 * ib_sa_register_client - Register an SA client.
 283 */
 284void ib_sa_register_client(struct ib_sa_client *client);
 285
 286/**
 287 * ib_sa_unregister_client - Deregister an SA client.
 288 * @client: Client object to deregister.
 289 */
 290void ib_sa_unregister_client(struct ib_sa_client *client);
 291
 292struct ib_sa_query;
 293
 294void ib_sa_cancel_query(int id, struct ib_sa_query *query);
 295
 296int ib_sa_path_rec_get(struct ib_sa_client *client,
 297                       struct ib_device *device, u8 port_num,
 298                       struct ib_sa_path_rec *rec,
 299                       ib_sa_comp_mask comp_mask,
 300                       int timeout_ms, gfp_t gfp_mask,
 301                       void (*callback)(int status,
 302                                        struct ib_sa_path_rec *resp,
 303                                        void *context),
 304                       void *context,
 305                       struct ib_sa_query **query);
 306
 307int ib_sa_service_rec_query(struct ib_sa_client *client,
 308                         struct ib_device *device, u8 port_num,
 309                         u8 method,
 310                         struct ib_sa_service_rec *rec,
 311                         ib_sa_comp_mask comp_mask,
 312                         int timeout_ms, gfp_t gfp_mask,
 313                         void (*callback)(int status,
 314                                          struct ib_sa_service_rec *resp,
 315                                          void *context),
 316                         void *context,
 317                         struct ib_sa_query **sa_query);
 318
 319struct ib_sa_multicast {
 320        struct ib_sa_mcmember_rec rec;
 321        ib_sa_comp_mask         comp_mask;
 322        int                     (*callback)(int status,
 323                                            struct ib_sa_multicast *multicast);
 324        void                    *context;
 325};
 326
 327/**
 328 * ib_sa_join_multicast - Initiates a join request to the specified multicast
 329 *   group.
 330 * @client: SA client
 331 * @device: Device associated with the multicast group.
 332 * @port_num: Port on the specified device to associate with the multicast
 333 *   group.
 334 * @rec: SA multicast member record specifying group attributes.
 335 * @comp_mask: Component mask indicating which group attributes of %rec are
 336 *   valid.
 337 * @gfp_mask: GFP mask for memory allocations.
 338 * @callback: User callback invoked once the join operation completes.
 339 * @context: User specified context stored with the ib_sa_multicast structure.
 340 *
 341 * This call initiates a multicast join request with the SA for the specified
 342 * multicast group.  If the join operation is started successfully, it returns
 343 * an ib_sa_multicast structure that is used to track the multicast operation.
 344 * Users must free this structure by calling ib_free_multicast, even if the
 345 * join operation later fails.  (The callback status is non-zero.)
 346 *
 347 * If the join operation fails; status will be non-zero, with the following
 348 * failures possible:
 349 * -ETIMEDOUT: The request timed out.
 350 * -EIO: An error occurred sending the query.
 351 * -EINVAL: The MCMemberRecord values differed from the existing group's.
 352 * -ENETRESET: Indicates that an fatal error has occurred on the multicast
 353 *   group, and the user must rejoin the group to continue using it.
 354 */
 355struct ib_sa_multicast *ib_sa_join_multicast(struct ib_sa_client *client,
 356                                             struct ib_device *device, u8 port_num,
 357                                             struct ib_sa_mcmember_rec *rec,
 358                                             ib_sa_comp_mask comp_mask, gfp_t gfp_mask,
 359                                             int (*callback)(int status,
 360                                                             struct ib_sa_multicast
 361                                                                    *multicast),
 362                                             void *context);
 363
 364/**
 365 * ib_free_multicast - Frees the multicast tracking structure, and releases
 366 *    any reference on the multicast group.
 367 * @multicast: Multicast tracking structure allocated by ib_join_multicast.
 368 *
 369 * This call blocks until the multicast identifier is destroyed.  It may
 370 * not be called from within the multicast callback; however, returning a non-
 371 * zero value from the callback will result in destroying the multicast
 372 * tracking structure.
 373 */
 374void ib_sa_free_multicast(struct ib_sa_multicast *multicast);
 375
 376/**
 377 * ib_get_mcmember_rec - Looks up a multicast member record by its MGID and
 378 *   returns it if found.
 379 * @device: Device associated with the multicast group.
 380 * @port_num: Port on the specified device to associate with the multicast
 381 *   group.
 382 * @mgid: MGID of multicast group.
 383 * @rec: Location to copy SA multicast member record.
 384 */
 385int ib_sa_get_mcmember_rec(struct ib_device *device, u8 port_num,
 386                           union ib_gid *mgid, struct ib_sa_mcmember_rec *rec);
 387
 388/**
 389 * ib_init_ah_from_mcmember - Initialize address handle attributes based on
 390 * an SA multicast member record.
 391 */
 392int ib_init_ah_from_mcmember(struct ib_device *device, u8 port_num,
 393                             struct ib_sa_mcmember_rec *rec,
 394                             struct ib_ah_attr *ah_attr);
 395
 396/**
 397 * ib_init_ah_from_path - Initialize address handle attributes based on an SA
 398 *   path record.
 399 */
 400int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
 401                         struct ib_sa_path_rec *rec,
 402                         struct ib_ah_attr *ah_attr);
 403
 404/**
 405 * ib_sa_unpack_path - Convert a path record from MAD format to struct
 406 * ib_sa_path_rec.
 407 */
 408void ib_sa_unpack_path(void *attribute, struct ib_sa_path_rec *rec);
 409
 410/* Support GuidInfoRecord */
 411int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
 412                              struct ib_device *device, u8 port_num,
 413                              struct ib_sa_guidinfo_rec *rec,
 414                              ib_sa_comp_mask comp_mask, u8 method,
 415                              int timeout_ms, gfp_t gfp_mask,
 416                              void (*callback)(int status,
 417                                               struct ib_sa_guidinfo_rec *resp,
 418                                               void *context),
 419                              void *context,
 420                              struct ib_sa_query **sa_query);
 421#endif /* IB_SA_H */
 422
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