drivers/infiniband/core/sa_query.c

   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 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/err.h>
  38 #include <linux/random.h>
  39 #include <linux/spinlock.h>
  40 #include <linux/slab.h>
  41 #include <linux/dma-mapping.h>
  42 #include <linux/kref.h>
  43 #include <linux/idr.h>
  44 #include <linux/workqueue.h>
  45 #include <uapi/linux/if_ether.h>
  46 #include <rdma/ib_pack.h>
  47 #include <rdma/ib_cache.h>
  48 #include <rdma/rdma_netlink.h>
  49 #include <net/netlink.h>
  50 #include <uapi/rdma/ib_user_sa.h>
  51 #include <rdma/ib_marshall.h>
  52 #include <rdma/ib_addr.h>
  53 #include "sa.h"
  54 #include "core_priv.h"
  55
  56 #define IB_SA_LOCAL_SVC_TIMEOUT_MIN             100
  57 #define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT         2000
  58 #define IB_SA_LOCAL_SVC_TIMEOUT_MAX             200000
  59 #define IB_SA_CPI_MAX_RETRY_CNT                 3
  60 #define IB_SA_CPI_RETRY_WAIT                    1000 /*msecs */
  61 static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
  62
  63 struct ib_sa_sm_ah {
  64         struct ib_ah        *ah;
  65         struct kref          ref;
  66         u16                  pkey_index;
  67         u8                   src_path_mask;
  68 };
  69
  70 enum rdma_class_port_info_type {
  71         RDMA_CLASS_PORT_INFO_IB,
  72         RDMA_CLASS_PORT_INFO_OPA
  73 };
  74
  75 struct rdma_class_port_info {
  76         enum rdma_class_port_info_type type;
  77         union {
  78                 struct ib_class_port_info ib;
  79                 struct opa_class_port_info opa;
  80         };
  81 };
  82
  83 struct ib_sa_classport_cache {
  84         bool valid;
  85         int retry_cnt;
  86         struct rdma_class_port_info data;
  87 };
  88
  89 struct ib_sa_port {
  90         struct ib_mad_agent *agent;
  91         struct ib_sa_sm_ah  *sm_ah;
  92         struct work_struct   update_task;
  93         struct ib_sa_classport_cache classport_info;
  94         struct delayed_work ib_cpi_work;
  95         spinlock_t                   classport_lock; /* protects class port info set */
  96         spinlock_t           ah_lock;
  97         u8                   port_num;
  98 };
  99
 100 struct ib_sa_device {
 101         int                     start_port, end_port;
 102         struct ib_event_handler event_handler;
 103         struct ib_sa_port port[0];
 104 };
 105
 106 struct ib_sa_query {
 107         void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
 108         void (*release)(struct ib_sa_query *);
 109         struct ib_sa_client    *client;
 110         struct ib_sa_port      *port;
 111         struct ib_mad_send_buf *mad_buf;
 112         struct ib_sa_sm_ah     *sm_ah;
 113         int                     id;
 114         u32                     flags;
 115         struct list_head        list; /* Local svc request list */
 116         u32                     seq; /* Local svc request sequence number */
 117         unsigned long           timeout; /* Local svc timeout */
 118         u8                      path_use; /* How will the pathrecord be used */
 119 };
 120
 121 #define IB_SA_ENABLE_LOCAL_SERVICE      0x00000001
 122 #define IB_SA_CANCEL                    0x00000002
 123 #define IB_SA_QUERY_OPA                 0x00000004
 124
 125 struct ib_sa_service_query {
 126         void (*callback)(int, struct ib_sa_service_rec *, void *);
 127         void *context;
 128         struct ib_sa_query sa_query;
 129 };
 130
 131 struct ib_sa_path_query {
 132         void (*callback)(int, struct sa_path_rec *, void *);
 133         void *context;
 134         struct ib_sa_query sa_query;
 135         struct sa_path_rec *conv_pr;
 136 };
 137
 138 struct ib_sa_guidinfo_query {
 139         void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
 140         void *context;
 141         struct ib_sa_query sa_query;
 142 };
 143
 144 struct ib_sa_classport_info_query {
 145         void (*callback)(void *);
 146         void *context;
 147         struct ib_sa_query sa_query;
 148 };
 149
 150 struct ib_sa_mcmember_query {
 151         void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
 152         void *context;
 153         struct ib_sa_query sa_query;
 154 };
 155
 156 static LIST_HEAD(ib_nl_request_list);
 157 static DEFINE_SPINLOCK(ib_nl_request_lock);
 158 static atomic_t ib_nl_sa_request_seq;
 159 static struct workqueue_struct *ib_nl_wq;
 160 static struct delayed_work ib_nl_timed_work;
 161 static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
 162         [LS_NLA_TYPE_PATH_RECORD]       = {.type = NLA_BINARY,
 163                 .len = sizeof(struct ib_path_rec_data)},
 164         [LS_NLA_TYPE_TIMEOUT]           = {.type = NLA_U32},
 165         [LS_NLA_TYPE_SERVICE_ID]        = {.type = NLA_U64},
 166         [LS_NLA_TYPE_DGID]              = {.type = NLA_BINARY,
 167                 .len = sizeof(struct rdma_nla_ls_gid)},
 168         [LS_NLA_TYPE_SGID]              = {.type = NLA_BINARY,
 169                 .len = sizeof(struct rdma_nla_ls_gid)},
 170         [LS_NLA_TYPE_TCLASS]            = {.type = NLA_U8},
 171         [LS_NLA_TYPE_PKEY]              = {.type = NLA_U16},
 172         [LS_NLA_TYPE_QOS_CLASS]         = {.type = NLA_U16},
 173 };
 174
 175
 176 static void ib_sa_add_one(struct ib_device *device);
 177 static void ib_sa_remove_one(struct ib_device *device, void *client_data);
 178
 179 static struct ib_client sa_client = {
 180         .name   = "sa",
 181         .add    = ib_sa_add_one,
 182         .remove = ib_sa_remove_one
 183 };
 184
 185 static DEFINE_SPINLOCK(idr_lock);
 186 static DEFINE_IDR(query_idr);
 187
 188 static DEFINE_SPINLOCK(tid_lock);
 189 static u32 tid;
 190
 191 #define PATH_REC_FIELD(field) \
 192         .struct_offset_bytes = offsetof(struct sa_path_rec, field),     \
 193         .struct_size_bytes   = sizeof((struct sa_path_rec *)0)->field,  \
 194         .field_name          = "sa_path_rec:" #field
 195
 196 static const struct ib_field path_rec_table[] = {
 197         { PATH_REC_FIELD(service_id),
 198           .offset_words = 0,
 199           .offset_bits  = 0,
 200           .size_bits    = 64 },
 201         { PATH_REC_FIELD(dgid),
 202           .offset_words = 2,
 203           .offset_bits  = 0,
 204           .size_bits    = 128 },
 205         { PATH_REC_FIELD(sgid),
 206           .offset_words = 6,
 207           .offset_bits  = 0,
 208           .size_bits    = 128 },
 209         { PATH_REC_FIELD(ib.dlid),
 210           .offset_words = 10,
 211           .offset_bits  = 0,
 212           .size_bits    = 16 },
 213         { PATH_REC_FIELD(ib.slid),
 214           .offset_words = 10,
 215           .offset_bits  = 16,
 216           .size_bits    = 16 },
 217         { PATH_REC_FIELD(ib.raw_traffic),
 218           .offset_words = 11,
 219           .offset_bits  = 0,
 220           .size_bits    = 1 },
 221         { RESERVED,
 222           .offset_words = 11,
 223           .offset_bits  = 1,
 224           .size_bits    = 3 },
 225         { PATH_REC_FIELD(flow_label),
 226           .offset_words = 11,
 227           .offset_bits  = 4,
 228           .size_bits    = 20 },
 229         { PATH_REC_FIELD(hop_limit),
 230           .offset_words = 11,
 231           .offset_bits  = 24,
 232           .size_bits    = 8 },
 233         { PATH_REC_FIELD(traffic_class),
 234           .offset_words = 12,
 235           .offset_bits  = 0,
 236           .size_bits    = 8 },
 237         { PATH_REC_FIELD(reversible),
 238           .offset_words = 12,
 239           .offset_bits  = 8,
 240           .size_bits    = 1 },
 241         { PATH_REC_FIELD(numb_path),
 242           .offset_words = 12,
 243           .offset_bits  = 9,
 244           .size_bits    = 7 },
 245         { PATH_REC_FIELD(pkey),
 246           .offset_words = 12,
 247           .offset_bits  = 16,
 248           .size_bits    = 16 },
 249         { PATH_REC_FIELD(qos_class),
 250           .offset_words = 13,
 251           .offset_bits  = 0,
 252           .size_bits    = 12 },
 253         { PATH_REC_FIELD(sl),
 254           .offset_words = 13,
 255           .offset_bits  = 12,
 256           .size_bits    = 4 },
 257         { PATH_REC_FIELD(mtu_selector),
 258           .offset_words = 13,
 259           .offset_bits  = 16,
 260           .size_bits    = 2 },
 261         { PATH_REC_FIELD(mtu),
 262           .offset_words = 13,
 263           .offset_bits  = 18,
 264           .size_bits    = 6 },
 265         { PATH_REC_FIELD(rate_selector),
 266           .offset_words = 13,
 267           .offset_bits  = 24,
 268           .size_bits    = 2 },
 269         { PATH_REC_FIELD(rate),
 270           .offset_words = 13,
 271           .offset_bits  = 26,
 272           .size_bits    = 6 },
 273         { PATH_REC_FIELD(packet_life_time_selector),
 274           .offset_words = 14,
 275           .offset_bits  = 0,
 276           .size_bits    = 2 },
 277         { PATH_REC_FIELD(packet_life_time),
 278           .offset_words = 14,
 279           .offset_bits  = 2,
 280           .size_bits    = 6 },
 281         { PATH_REC_FIELD(preference),
 282           .offset_words = 14,
 283           .offset_bits  = 8,
 284           .size_bits    = 8 },
 285         { RESERVED,
 286           .offset_words = 14,
 287           .offset_bits  = 16,
 288           .size_bits    = 48 },
 289 };
 290
 291 #define OPA_PATH_REC_FIELD(field) \
 292         .struct_offset_bytes = \
 293                 offsetof(struct sa_path_rec, field), \
 294         .struct_size_bytes   = \
 295                 sizeof((struct sa_path_rec *)0)->field, \
 296         .field_name          = "sa_path_rec:" #field
 297
 298 static const struct ib_field opa_path_rec_table[] = {
 299         { OPA_PATH_REC_FIELD(service_id),
 300           .offset_words = 0,
 301           .offset_bits  = 0,
 302           .size_bits    = 64 },
 303         { OPA_PATH_REC_FIELD(dgid),
 304           .offset_words = 2,
 305           .offset_bits  = 0,
 306           .size_bits    = 128 },
 307         { OPA_PATH_REC_FIELD(sgid),
 308           .offset_words = 6,
 309           .offset_bits  = 0,
 310           .size_bits    = 128 },
 311         { OPA_PATH_REC_FIELD(opa.dlid),
 312           .offset_words = 10,
 313           .offset_bits  = 0,
 314           .size_bits    = 32 },
 315         { OPA_PATH_REC_FIELD(opa.slid),
 316           .offset_words = 11,
 317           .offset_bits  = 0,
 318           .size_bits    = 32 },
 319         { OPA_PATH_REC_FIELD(opa.raw_traffic),
 320           .offset_words = 12,
 321           .offset_bits  = 0,
 322           .size_bits    = 1 },
 323         { RESERVED,
 324           .offset_words = 12,
 325           .offset_bits  = 1,
 326           .size_bits    = 3 },
 327         { OPA_PATH_REC_FIELD(flow_label),
 328           .offset_words = 12,
 329           .offset_bits  = 4,
 330           .size_bits    = 20 },
 331         { OPA_PATH_REC_FIELD(hop_limit),
 332           .offset_words = 12,
 333           .offset_bits  = 24,
 334           .size_bits    = 8 },
 335         { OPA_PATH_REC_FIELD(traffic_class),
 336           .offset_words = 13,
 337           .offset_bits  = 0,
 338           .size_bits    = 8 },
 339         { OPA_PATH_REC_FIELD(reversible),
 340           .offset_words = 13,
 341           .offset_bits  = 8,
 342           .size_bits    = 1 },
 343         { OPA_PATH_REC_FIELD(numb_path),
 344           .offset_words = 13,
 345           .offset_bits  = 9,
 346           .size_bits    = 7 },
 347         { OPA_PATH_REC_FIELD(pkey),
 348           .offset_words = 13,
 349           .offset_bits  = 16,
 350           .size_bits    = 16 },
 351         { OPA_PATH_REC_FIELD(opa.l2_8B),
 352           .offset_words = 14,
 353           .offset_bits  = 0,
 354           .size_bits    = 1 },
 355         { OPA_PATH_REC_FIELD(opa.l2_10B),
 356           .offset_words = 14,
 357           .offset_bits  = 1,
 358           .size_bits    = 1 },
 359         { OPA_PATH_REC_FIELD(opa.l2_9B),
 360           .offset_words = 14,
 361           .offset_bits  = 2,
 362           .size_bits    = 1 },
 363         { OPA_PATH_REC_FIELD(opa.l2_16B),
 364           .offset_words = 14,
 365           .offset_bits  = 3,
 366           .size_bits    = 1 },
 367         { RESERVED,
 368           .offset_words = 14,
 369           .offset_bits  = 4,
 370           .size_bits    = 2 },
 371         { OPA_PATH_REC_FIELD(opa.qos_type),
 372           .offset_words = 14,
 373           .offset_bits  = 6,
 374           .size_bits    = 2 },
 375         { OPA_PATH_REC_FIELD(opa.qos_priority),
 376           .offset_words = 14,
 377           .offset_bits  = 8,
 378           .size_bits    = 8 },
 379         { RESERVED,
 380           .offset_words = 14,
 381           .offset_bits  = 16,
 382           .size_bits    = 3 },
 383         { OPA_PATH_REC_FIELD(sl),
 384           .offset_words = 14,
 385           .offset_bits  = 19,
 386           .size_bits    = 5 },
 387         { RESERVED,
 388           .offset_words = 14,
 389           .offset_bits  = 24,
 390           .size_bits    = 8 },
 391         { OPA_PATH_REC_FIELD(mtu_selector),
 392           .offset_words = 15,
 393           .offset_bits  = 0,
 394           .size_bits    = 2 },
 395         { OPA_PATH_REC_FIELD(mtu),
 396           .offset_words = 15,
 397           .offset_bits  = 2,
 398           .size_bits    = 6 },
 399         { OPA_PATH_REC_FIELD(rate_selector),
 400           .offset_words = 15,
 401           .offset_bits  = 8,
 402           .size_bits    = 2 },
 403         { OPA_PATH_REC_FIELD(rate),
 404           .offset_words = 15,
 405           .offset_bits  = 10,
 406           .size_bits    = 6 },
 407         { OPA_PATH_REC_FIELD(packet_life_time_selector),
 408           .offset_words = 15,
 409           .offset_bits  = 16,
 410           .size_bits    = 2 },
 411         { OPA_PATH_REC_FIELD(packet_life_time),
 412           .offset_words = 15,
 413           .offset_bits  = 18,
 414           .size_bits    = 6 },
 415         { OPA_PATH_REC_FIELD(preference),
 416           .offset_words = 15,
 417           .offset_bits  = 24,
 418           .size_bits    = 8 },
 419 };
 420
 421 #define MCMEMBER_REC_FIELD(field) \
 422         .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field),      \
 423         .struct_size_bytes   = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
 424         .field_name          = "sa_mcmember_rec:" #field
 425
 426 static const struct ib_field mcmember_rec_table[] = {
 427         { MCMEMBER_REC_FIELD(mgid),
 428           .offset_words = 0,
 429           .offset_bits  = 0,
 430           .size_bits    = 128 },
 431         { MCMEMBER_REC_FIELD(port_gid),
 432           .offset_words = 4,
 433           .offset_bits  = 0,
 434           .size_bits    = 128 },
 435         { MCMEMBER_REC_FIELD(qkey),
 436           .offset_words = 8,
 437           .offset_bits  = 0,
 438           .size_bits    = 32 },
 439         { MCMEMBER_REC_FIELD(mlid),
 440           .offset_words = 9,
 441           .offset_bits  = 0,
 442           .size_bits    = 16 },
 443         { MCMEMBER_REC_FIELD(mtu_selector),
 444           .offset_words = 9,
 445           .offset_bits  = 16,
 446           .size_bits    = 2 },
 447         { MCMEMBER_REC_FIELD(mtu),
 448           .offset_words = 9,
 449           .offset_bits  = 18,
 450           .size_bits    = 6 },
 451         { MCMEMBER_REC_FIELD(traffic_class),
 452           .offset_words = 9,
 453           .offset_bits  = 24,
 454           .size_bits    = 8 },
 455         { MCMEMBER_REC_FIELD(pkey),
 456           .offset_words = 10,
 457           .offset_bits  = 0,
 458           .size_bits    = 16 },
 459         { MCMEMBER_REC_FIELD(rate_selector),
 460           .offset_words = 10,
 461           .offset_bits  = 16,
 462           .size_bits    = 2 },
 463         { MCMEMBER_REC_FIELD(rate),
 464           .offset_words = 10,
 465           .offset_bits  = 18,
 466           .size_bits    = 6 },
 467         { MCMEMBER_REC_FIELD(packet_life_time_selector),
 468           .offset_words = 10,
 469           .offset_bits  = 24,
 470           .size_bits    = 2 },
 471         { MCMEMBER_REC_FIELD(packet_life_time),
 472           .offset_words = 10,
 473           .offset_bits  = 26,
 474           .size_bits    = 6 },
 475         { MCMEMBER_REC_FIELD(sl),
 476           .offset_words = 11,
 477           .offset_bits  = 0,
 478           .size_bits    = 4 },
 479         { MCMEMBER_REC_FIELD(flow_label),
 480           .offset_words = 11,
 481           .offset_bits  = 4,
 482           .size_bits    = 20 },
 483         { MCMEMBER_REC_FIELD(hop_limit),
 484           .offset_words = 11,
 485           .offset_bits  = 24,
 486           .size_bits    = 8 },
 487         { MCMEMBER_REC_FIELD(scope),
 488           .offset_words = 12,
 489           .offset_bits  = 0,
 490           .size_bits    = 4 },
 491         { MCMEMBER_REC_FIELD(join_state),
 492           .offset_words = 12,
 493           .offset_bits  = 4,
 494           .size_bits    = 4 },
 495         { MCMEMBER_REC_FIELD(proxy_join),
 496           .offset_words = 12,
 497           .offset_bits  = 8,
 498           .size_bits    = 1 },
 499         { RESERVED,
 500           .offset_words = 12,
 501           .offset_bits  = 9,
 502           .size_bits    = 23 },
 503 };
 504
 505 #define SERVICE_REC_FIELD(field) \
 506         .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field),       \
 507         .struct_size_bytes   = sizeof ((struct ib_sa_service_rec *) 0)->field,  \
 508         .field_name          = "sa_service_rec:" #field
 509
 510 static const struct ib_field service_rec_table[] = {
 511         { SERVICE_REC_FIELD(id),
 512           .offset_words = 0,
 513           .offset_bits  = 0,
 514           .size_bits    = 64 },
 515         { SERVICE_REC_FIELD(gid),
 516           .offset_words = 2,
 517           .offset_bits  = 0,
 518           .size_bits    = 128 },
 519         { SERVICE_REC_FIELD(pkey),
 520           .offset_words = 6,
 521           .offset_bits  = 0,
 522           .size_bits    = 16 },
 523         { SERVICE_REC_FIELD(lease),
 524           .offset_words = 7,
 525           .offset_bits  = 0,
 526           .size_bits    = 32 },
 527         { SERVICE_REC_FIELD(key),
 528           .offset_words = 8,
 529           .offset_bits  = 0,
 530           .size_bits    = 128 },
 531         { SERVICE_REC_FIELD(name),
 532           .offset_words = 12,
 533           .offset_bits  = 0,
 534           .size_bits    = 64*8 },
 535         { SERVICE_REC_FIELD(data8),
 536           .offset_words = 28,
 537           .offset_bits  = 0,
 538           .size_bits    = 16*8 },
 539         { SERVICE_REC_FIELD(data16),
 540           .offset_words = 32,
 541           .offset_bits  = 0,
 542           .size_bits    = 8*16 },
 543         { SERVICE_REC_FIELD(data32),
 544           .offset_words = 36,
 545           .offset_bits  = 0,
 546           .size_bits    = 4*32 },
 547         { SERVICE_REC_FIELD(data64),
 548           .offset_words = 40,
 549           .offset_bits  = 0,
 550           .size_bits    = 2*64 },
 551 };
 552
 553 #define CLASSPORTINFO_REC_FIELD(field) \
 554         .struct_offset_bytes = offsetof(struct ib_class_port_info, field),      \
 555         .struct_size_bytes   = sizeof((struct ib_class_port_info *)0)->field,   \
 556         .field_name          = "ib_class_port_info:" #field
 557
 558 static const struct ib_field ib_classport_info_rec_table[] = {
 559         { CLASSPORTINFO_REC_FIELD(base_version),
 560           .offset_words = 0,
 561           .offset_bits  = 0,
 562           .size_bits    = 8 },
 563         { CLASSPORTINFO_REC_FIELD(class_version),
 564           .offset_words = 0,
 565           .offset_bits  = 8,
 566           .size_bits    = 8 },
 567         { CLASSPORTINFO_REC_FIELD(capability_mask),
 568           .offset_words = 0,
 569           .offset_bits  = 16,
 570           .size_bits    = 16 },
 571         { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
 572           .offset_words = 1,
 573           .offset_bits  = 0,
 574           .size_bits    = 32 },
 575         { CLASSPORTINFO_REC_FIELD(redirect_gid),
 576           .offset_words = 2,
 577           .offset_bits  = 0,
 578           .size_bits    = 128 },
 579         { CLASSPORTINFO_REC_FIELD(redirect_tcslfl),
 580           .offset_words = 6,
 581           .offset_bits  = 0,
 582           .size_bits    = 32 },
 583         { CLASSPORTINFO_REC_FIELD(redirect_lid),
 584           .offset_words = 7,
 585           .offset_bits  = 0,
 586           .size_bits    = 16 },
 587         { CLASSPORTINFO_REC_FIELD(redirect_pkey),
 588           .offset_words = 7,
 589           .offset_bits  = 16,
 590           .size_bits    = 16 },
 591
 592         { CLASSPORTINFO_REC_FIELD(redirect_qp),
 593           .offset_words = 8,
 594           .offset_bits  = 0,
 595           .size_bits    = 32 },
 596         { CLASSPORTINFO_REC_FIELD(redirect_qkey),
 597           .offset_words = 9,
 598           .offset_bits  = 0,
 599           .size_bits    = 32 },
 600
 601         { CLASSPORTINFO_REC_FIELD(trap_gid),
 602           .offset_words = 10,
 603           .offset_bits  = 0,
 604           .size_bits    = 128 },
 605         { CLASSPORTINFO_REC_FIELD(trap_tcslfl),
 606           .offset_words = 14,
 607           .offset_bits  = 0,
 608           .size_bits    = 32 },
 609
 610         { CLASSPORTINFO_REC_FIELD(trap_lid),
 611           .offset_words = 15,
 612           .offset_bits  = 0,
 613           .size_bits    = 16 },
 614         { CLASSPORTINFO_REC_FIELD(trap_pkey),
 615           .offset_words = 15,
 616           .offset_bits  = 16,
 617           .size_bits    = 16 },
 618
 619         { CLASSPORTINFO_REC_FIELD(trap_hlqp),
 620           .offset_words = 16,
 621           .offset_bits  = 0,
 622           .size_bits    = 32 },
 623         { CLASSPORTINFO_REC_FIELD(trap_qkey),
 624           .offset_words = 17,
 625           .offset_bits  = 0,
 626           .size_bits    = 32 },
 627 };
 628
 629 #define OPA_CLASSPORTINFO_REC_FIELD(field) \
 630         .struct_offset_bytes =\
 631                 offsetof(struct opa_class_port_info, field),    \
 632         .struct_size_bytes   = \
 633                 sizeof((struct opa_class_port_info *)0)->field, \
 634         .field_name          = "opa_class_port_info:" #field
 635
 636 static const struct ib_field opa_classport_info_rec_table[] = {
 637         { OPA_CLASSPORTINFO_REC_FIELD(base_version),
 638           .offset_words = 0,
 639           .offset_bits  = 0,
 640           .size_bits    = 8 },
 641         { OPA_CLASSPORTINFO_REC_FIELD(class_version),
 642           .offset_words = 0,
 643           .offset_bits  = 8,
 644           .size_bits    = 8 },
 645         { OPA_CLASSPORTINFO_REC_FIELD(cap_mask),
 646           .offset_words = 0,
 647           .offset_bits  = 16,
 648           .size_bits    = 16 },
 649         { OPA_CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
 650           .offset_words = 1,
 651           .offset_bits  = 0,
 652           .size_bits    = 32 },
 653         { OPA_CLASSPORTINFO_REC_FIELD(redirect_gid),
 654           .offset_words = 2,
 655           .offset_bits  = 0,
 656           .size_bits    = 128 },
 657         { OPA_CLASSPORTINFO_REC_FIELD(redirect_tc_fl),
 658           .offset_words = 6,
 659           .offset_bits  = 0,
 660           .size_bits    = 32 },
 661         { OPA_CLASSPORTINFO_REC_FIELD(redirect_lid),
 662           .offset_words = 7,
 663           .offset_bits  = 0,
 664           .size_bits    = 32 },
 665         { OPA_CLASSPORTINFO_REC_FIELD(redirect_sl_qp),
 666           .offset_words = 8,
 667           .offset_bits  = 0,
 668           .size_bits    = 32 },
 669         { OPA_CLASSPORTINFO_REC_FIELD(redirect_qkey),
 670           .offset_words = 9,
 671           .offset_bits  = 0,
 672           .size_bits    = 32 },
 673         { OPA_CLASSPORTINFO_REC_FIELD(trap_gid),
 674           .offset_words = 10,
 675           .offset_bits  = 0,
 676           .size_bits    = 128 },
 677         { OPA_CLASSPORTINFO_REC_FIELD(trap_tc_fl),
 678           .offset_words = 14,
 679           .offset_bits  = 0,
 680           .size_bits    = 32 },
 681         { OPA_CLASSPORTINFO_REC_FIELD(trap_lid),
 682           .offset_words = 15,
 683           .offset_bits  = 0,
 684           .size_bits    = 32 },
 685         { OPA_CLASSPORTINFO_REC_FIELD(trap_hl_qp),
 686           .offset_words = 16,
 687           .offset_bits  = 0,
 688           .size_bits    = 32 },
 689         { OPA_CLASSPORTINFO_REC_FIELD(trap_qkey),
 690           .offset_words = 17,
 691           .offset_bits  = 0,
 692           .size_bits    = 32 },
 693         { OPA_CLASSPORTINFO_REC_FIELD(trap_pkey),
 694           .offset_words = 18,
 695           .offset_bits  = 0,
 696           .size_bits    = 16 },
 697         { OPA_CLASSPORTINFO_REC_FIELD(redirect_pkey),
 698           .offset_words = 18,
 699           .offset_bits  = 16,
 700           .size_bits    = 16 },
 701         { OPA_CLASSPORTINFO_REC_FIELD(trap_sl_rsvd),
 702           .offset_words = 19,
 703           .offset_bits  = 0,
 704           .size_bits    = 8 },
 705         { RESERVED,
 706           .offset_words = 19,
 707           .offset_bits  = 8,
 708           .size_bits    = 24 },
 709 };
 710
 711 #define GUIDINFO_REC_FIELD(field) \
 712         .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field),      \
 713         .struct_size_bytes   = sizeof((struct ib_sa_guidinfo_rec *) 0)->field,  \
 714         .field_name          = "sa_guidinfo_rec:" #field
 715
 716 static const struct ib_field guidinfo_rec_table[] = {
 717         { GUIDINFO_REC_FIELD(lid),
 718           .offset_words = 0,
 719           .offset_bits  = 0,
 720           .size_bits    = 16 },
 721         { GUIDINFO_REC_FIELD(block_num),
 722           .offset_words = 0,
 723           .offset_bits  = 16,
 724           .size_bits    = 8 },
 725         { GUIDINFO_REC_FIELD(res1),
 726           .offset_words = 0,
 727           .offset_bits  = 24,
 728           .size_bits    = 8 },
 729         { GUIDINFO_REC_FIELD(res2),
 730           .offset_words = 1,
 731           .offset_bits  = 0,
 732           .size_bits    = 32 },
 733         { GUIDINFO_REC_FIELD(guid_info_list),
 734           .offset_words = 2,
 735           .offset_bits  = 0,
 736           .size_bits    = 512 },
 737 };
 738
 739 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
 740 {
 741         query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
 742 }
 743
 744 static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
 745 {
 746         return (query->flags & IB_SA_CANCEL);
 747 }
 748
 749 static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
 750                                      struct ib_sa_query *query)
 751 {
 752         struct sa_path_rec *sa_rec = query->mad_buf->context[1];
 753         struct ib_sa_mad *mad = query->mad_buf->mad;
 754         ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
 755         u16 val16;
 756         u64 val64;
 757         struct rdma_ls_resolve_header *header;
 758
 759         query->mad_buf->context[1] = NULL;
 760
 761         /* Construct the family header first */
 762         header = (struct rdma_ls_resolve_header *)
 763                 skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
 764         memcpy(header->device_name, query->port->agent->device->name,
 765                LS_DEVICE_NAME_MAX);
 766         header->port_num = query->port->port_num;
 767
 768         if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
 769             sa_rec->reversible != 0)
 770                 query->path_use = LS_RESOLVE_PATH_USE_GMP;
 771         else
 772                 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
 773         header->path_use = query->path_use;
 774
 775         /* Now build the attributes */
 776         if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
 777                 val64 = be64_to_cpu(sa_rec->service_id);
 778                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
 779                         sizeof(val64), &val64);
 780         }
 781         if (comp_mask & IB_SA_PATH_REC_DGID)
 782                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
 783                         sizeof(sa_rec->dgid), &sa_rec->dgid);
 784         if (comp_mask & IB_SA_PATH_REC_SGID)
 785                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
 786                         sizeof(sa_rec->sgid), &sa_rec->sgid);
 787         if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
 788                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
 789                         sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
 790
 791         if (comp_mask & IB_SA_PATH_REC_PKEY) {
 792                 val16 = be16_to_cpu(sa_rec->pkey);
 793                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
 794                         sizeof(val16), &val16);
 795         }
 796         if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
 797                 val16 = be16_to_cpu(sa_rec->qos_class);
 798                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
 799                         sizeof(val16), &val16);
 800         }
 801 }
 802
 803 static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
 804 {
 805         int len = 0;
 806
 807         if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
 808                 len += nla_total_size(sizeof(u64));
 809         if (comp_mask & IB_SA_PATH_REC_DGID)
 810                 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
 811         if (comp_mask & IB_SA_PATH_REC_SGID)
 812                 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
 813         if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
 814                 len += nla_total_size(sizeof(u8));
 815         if (comp_mask & IB_SA_PATH_REC_PKEY)
 816                 len += nla_total_size(sizeof(u16));
 817         if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
 818                 len += nla_total_size(sizeof(u16));
 819
 820         /*
 821          * Make sure that at least some of the required comp_mask bits are
 822          * set.
 823          */
 824         if (WARN_ON(len == 0))
 825                 return len;
 826
 827         /* Add the family header */
 828         len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
 829
 830         return len;
 831 }
 832
 833 static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
 834 {
 835         struct sk_buff *skb = NULL;
 836         struct nlmsghdr *nlh;
 837         void *data;
 838         int ret = 0;
 839         struct ib_sa_mad *mad;
 840         int len;
 841
 842         mad = query->mad_buf->mad;
 843         len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
 844         if (len <= 0)
 845                 return -EMSGSIZE;
 846
 847         skb = nlmsg_new(len, gfp_mask);
 848         if (!skb)
 849                 return -ENOMEM;
 850
 851         /* Put nlmsg header only for now */
 852         data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
 853                             RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
 854         if (!data) {
 855                 nlmsg_free(skb);
 856                 return -EMSGSIZE;
 857         }
 858
 859         /* Add attributes */
 860         ib_nl_set_path_rec_attrs(skb, query);
 861
 862         /* Repair the nlmsg header length */
 863         nlmsg_end(skb, nlh);
 864
 865         ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_LS, gfp_mask);
 866         if (!ret)
 867                 ret = len;
 868         else
 869                 ret = 0;
 870
 871         return ret;
 872 }
 873
 874 static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
 875 {
 876         unsigned long flags;
 877         unsigned long delay;
 878         int ret;
 879
 880         INIT_LIST_HEAD(&query->list);
 881         query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
 882
 883         /* Put the request on the list first.*/
 884         spin_lock_irqsave(&ib_nl_request_lock, flags);
 885         delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
 886         query->timeout = delay + jiffies;
 887         list_add_tail(&query->list, &ib_nl_request_list);
 888         /* Start the timeout if this is the only request */
 889         if (ib_nl_request_list.next == &query->list)
 890                 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
 891         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 892
 893         ret = ib_nl_send_msg(query, gfp_mask);
 894         if (ret <= 0) {
 895                 ret = -EIO;
 896                 /* Remove the request */
 897                 spin_lock_irqsave(&ib_nl_request_lock, flags);
 898                 list_del(&query->list);
 899                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 900         } else {
 901                 ret = 0;
 902         }
 903
 904         return ret;
 905 }
 906
 907 static int ib_nl_cancel_request(struct ib_sa_query *query)
 908 {
 909         unsigned long flags;
 910         struct ib_sa_query *wait_query;
 911         int found = 0;
 912
 913         spin_lock_irqsave(&ib_nl_request_lock, flags);
 914         list_for_each_entry(wait_query, &ib_nl_request_list, list) {
 915                 /* Let the timeout to take care of the callback */
 916                 if (query == wait_query) {
 917                         query->flags |= IB_SA_CANCEL;
 918                         query->timeout = jiffies;
 919                         list_move(&query->list, &ib_nl_request_list);
 920                         found = 1;
 921                         mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
 922                         break;
 923                 }
 924         }
 925         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 926
 927         return found;
 928 }
 929
 930 static void send_handler(struct ib_mad_agent *agent,
 931                          struct ib_mad_send_wc *mad_send_wc);
 932
 933 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
 934                                            const struct nlmsghdr *nlh)
 935 {
 936         struct ib_mad_send_wc mad_send_wc;
 937         struct ib_sa_mad *mad = NULL;
 938         const struct nlattr *head, *curr;
 939         struct ib_path_rec_data  *rec;
 940         int len, rem;
 941         u32 mask = 0;
 942         int status = -EIO;
 943
 944         if (query->callback) {
 945                 head = (const struct nlattr *) nlmsg_data(nlh);
 946                 len = nlmsg_len(nlh);
 947                 switch (query->path_use) {
 948                 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
 949                         mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
 950                         break;
 951
 952                 case LS_RESOLVE_PATH_USE_ALL:
 953                 case LS_RESOLVE_PATH_USE_GMP:
 954                 default:
 955                         mask = IB_PATH_PRIMARY | IB_PATH_GMP |
 956                                 IB_PATH_BIDIRECTIONAL;
 957                         break;
 958                 }
 959                 nla_for_each_attr(curr, head, len, rem) {
 960                         if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
 961                                 rec = nla_data(curr);
 962                                 /*
 963                                  * Get the first one. In the future, we may
 964                                  * need to get up to 6 pathrecords.
 965                                  */
 966                                 if ((rec->flags & mask) == mask) {
 967                                         mad = query->mad_buf->mad;
 968                                         mad->mad_hdr.method |=
 969                                                 IB_MGMT_METHOD_RESP;
 970                                         memcpy(mad->data, rec->path_rec,
 971                                                sizeof(rec->path_rec));
 972                                         status = 0;
 973                                         break;
 974                                 }
 975                         }
 976                 }
 977                 query->callback(query, status, mad);
 978         }
 979
 980         mad_send_wc.send_buf = query->mad_buf;
 981         mad_send_wc.status = IB_WC_SUCCESS;
 982         send_handler(query->mad_buf->mad_agent, &mad_send_wc);
 983 }
 984
 985 static void ib_nl_request_timeout(struct work_struct *work)
 986 {
 987         unsigned long flags;
 988         struct ib_sa_query *query;
 989         unsigned long delay;
 990         struct ib_mad_send_wc mad_send_wc;
 991         int ret;
 992
 993         spin_lock_irqsave(&ib_nl_request_lock, flags);
 994         while (!list_empty(&ib_nl_request_list)) {
 995                 query = list_entry(ib_nl_request_list.next,
 996                                    struct ib_sa_query, list);
 997
 998                 if (time_after(query->timeout, jiffies)) {
 999                         delay = query->timeout - jiffies;
1000                         if ((long)delay <= 0)
1001                                 delay = 1;
1002                         queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
1003                         break;
1004                 }
1005
1006                 list_del(&query->list);
1007                 ib_sa_disable_local_svc(query);
1008                 /* Hold the lock to protect against query cancellation */
1009                 if (ib_sa_query_cancelled(query))
1010                         ret = -1;
1011                 else
1012                         ret = ib_post_send_mad(query->mad_buf, NULL);
1013                 if (ret) {
1014                         mad_send_wc.send_buf = query->mad_buf;
1015                         mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
1016                         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1017                         send_handler(query->port->agent, &mad_send_wc);
1018                         spin_lock_irqsave(&ib_nl_request_lock, flags);
1019                 }
1020         }
1021         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1022 }
1023
1024 int ib_nl_handle_set_timeout(struct sk_buff *skb,
1025                              struct netlink_callback *cb)
1026 {
1027         const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
1028         int timeout, delta, abs_delta;
1029         const struct nlattr *attr;
1030         unsigned long flags;
1031         struct ib_sa_query *query;
1032         long delay = 0;
1033         struct nlattr *tb[LS_NLA_TYPE_MAX];
1034         int ret;
1035
1036         if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
1037             !(NETLINK_CB(skb).sk) ||
1038             !netlink_capable(skb, CAP_NET_ADMIN))
1039                 return -EPERM;
1040
1041         ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1042                         nlmsg_len(nlh), ib_nl_policy, NULL);
1043         attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
1044         if (ret || !attr)
1045                 goto settimeout_out;
1046
1047         timeout = *(int *) nla_data(attr);
1048         if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
1049                 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
1050         if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
1051                 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
1052
1053         delta = timeout - sa_local_svc_timeout_ms;
1054         if (delta < 0)
1055                 abs_delta = -delta;
1056         else
1057                 abs_delta = delta;
1058
1059         if (delta != 0) {
1060                 spin_lock_irqsave(&ib_nl_request_lock, flags);
1061                 sa_local_svc_timeout_ms = timeout;
1062                 list_for_each_entry(query, &ib_nl_request_list, list) {
1063                         if (delta < 0 && abs_delta > query->timeout)
1064                                 query->timeout = 0;
1065                         else
1066                                 query->timeout += delta;
1067
1068                         /* Get the new delay from the first entry */
1069                         if (!delay) {
1070                                 delay = query->timeout - jiffies;
1071                                 if (delay <= 0)
1072                                         delay = 1;
1073                         }
1074                 }
1075                 if (delay)
1076                         mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
1077                                          (unsigned long)delay);
1078                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1079         }
1080
1081 settimeout_out:
1082         return skb->len;
1083 }
1084
1085 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
1086 {
1087         struct nlattr *tb[LS_NLA_TYPE_MAX];
1088         int ret;
1089
1090         if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
1091                 return 0;
1092
1093         ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1094                         nlmsg_len(nlh), ib_nl_policy, NULL);
1095         if (ret)
1096                 return 0;
1097
1098         return 1;
1099 }
1100
1101 int ib_nl_handle_resolve_resp(struct sk_buff *skb,
1102                               struct netlink_callback *cb)
1103 {
1104         const struct nlmsghdr *nlh = (struct nlmsghdr *)cb->nlh;
1105         unsigned long flags;
1106         struct ib_sa_query *query;
1107         struct ib_mad_send_buf *send_buf;
1108         struct ib_mad_send_wc mad_send_wc;
1109         int found = 0;
1110         int ret;
1111
1112         if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
1113             !(NETLINK_CB(skb).sk) ||
1114             !netlink_capable(skb, CAP_NET_ADMIN))
1115                 return -EPERM;
1116
1117         spin_lock_irqsave(&ib_nl_request_lock, flags);
1118         list_for_each_entry(query, &ib_nl_request_list, list) {
1119                 /*
1120                  * If the query is cancelled, let the timeout routine
1121                  * take care of it.
1122                  */
1123                 if (nlh->nlmsg_seq == query->seq) {
1124                         found = !ib_sa_query_cancelled(query);
1125                         if (found)
1126                                 list_del(&query->list);
1127                         break;
1128                 }
1129         }
1130
1131         if (!found) {
1132                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1133                 goto resp_out;
1134         }
1135
1136         send_buf = query->mad_buf;
1137
1138         if (!ib_nl_is_good_resolve_resp(nlh)) {
1139                 /* if the result is a failure, send out the packet via IB */
1140                 ib_sa_disable_local_svc(query);
1141                 ret = ib_post_send_mad(query->mad_buf, NULL);
1142                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1143                 if (ret) {
1144                         mad_send_wc.send_buf = send_buf;
1145                         mad_send_wc.status = IB_WC_GENERAL_ERR;
1146                         send_handler(query->port->agent, &mad_send_wc);
1147                 }
1148         } else {
1149                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1150                 ib_nl_process_good_resolve_rsp(query, nlh);
1151         }
1152
1153 resp_out:
1154         return skb->len;
1155 }
1156
1157 static void free_sm_ah(struct kref *kref)
1158 {
1159         struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
1160
1161         rdma_destroy_ah(sm_ah->ah);
1162         kfree(sm_ah);
1163 }
1164
1165 void ib_sa_register_client(struct ib_sa_client *client)
1166 {
1167         atomic_set(&client->users, 1);
1168         init_completion(&client->comp);
1169 }
1170 EXPORT_SYMBOL(ib_sa_register_client);
1171
1172 void ib_sa_unregister_client(struct ib_sa_client *client)
1173 {
1174         ib_sa_client_put(client);
1175         wait_for_completion(&client->comp);
1176 }
1177 EXPORT_SYMBOL(ib_sa_unregister_client);
1178
1179 /**
1180  * ib_sa_cancel_query - try to cancel an SA query
1181  * @id:ID of query to cancel
1182  * @query:query pointer to cancel
1183  *
1184  * Try to cancel an SA query.  If the id and query don't match up or
1185  * the query has already completed, nothing is done.  Otherwise the
1186  * query is canceled and will complete with a status of -EINTR.
1187  */
1188 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1189 {
1190         unsigned long flags;
1191         struct ib_mad_agent *agent;
1192         struct ib_mad_send_buf *mad_buf;
1193
1194         spin_lock_irqsave(&idr_lock, flags);
1195         if (idr_find(&query_idr, id) != query) {
1196                 spin_unlock_irqrestore(&idr_lock, flags);
1197                 return;
1198         }
1199         agent = query->port->agent;
1200         mad_buf = query->mad_buf;
1201         spin_unlock_irqrestore(&idr_lock, flags);
1202
1203         /*
1204          * If the query is still on the netlink request list, schedule
1205          * it to be cancelled by the timeout routine. Otherwise, it has been
1206          * sent to the MAD layer and has to be cancelled from there.
1207          */
1208         if (!ib_nl_cancel_request(query))
1209                 ib_cancel_mad(agent, mad_buf);
1210 }
1211 EXPORT_SYMBOL(ib_sa_cancel_query);
1212
1213 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
1214 {
1215         struct ib_sa_device *sa_dev;
1216         struct ib_sa_port   *port;
1217         unsigned long flags;
1218         u8 src_path_mask;
1219
1220         sa_dev = ib_get_client_data(device, &sa_client);
1221         if (!sa_dev)
1222                 return 0x7f;
1223
1224         port  = &sa_dev->port[port_num - sa_dev->start_port];
1225         spin_lock_irqsave(&port->ah_lock, flags);
1226         src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1227         spin_unlock_irqrestore(&port->ah_lock, flags);
1228
1229         return src_path_mask;
1230 }
1231
1232 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
1233                          struct sa_path_rec *rec,
1234                          struct rdma_ah_attr *ah_attr)
1235 {
1236         int ret;
1237         u16 gid_index;
1238         int use_roce;
1239         struct net_device *ndev = NULL;
1240
1241         memset(ah_attr, 0, sizeof *ah_attr);
1242         ah_attr->type = rdma_ah_find_type(device, port_num);
1243
1244         rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
1245         rdma_ah_set_sl(ah_attr, rec->sl);
1246         rdma_ah_set_path_bits(ah_attr, be32_to_cpu(sa_path_get_slid(rec)) &
1247                               get_src_path_mask(device, port_num));
1248         rdma_ah_set_port_num(ah_attr, port_num);
1249         rdma_ah_set_static_rate(ah_attr, rec->rate);
1250         use_roce = rdma_cap_eth_ah(device, port_num);
1251
1252         if (use_roce) {
1253                 struct net_device *idev;
1254                 struct net_device *resolved_dev;
1255                 struct rdma_dev_addr dev_addr = {
1256                         .bound_dev_if = ((sa_path_get_ifindex(rec) >= 0) ?
1257                                          sa_path_get_ifindex(rec) : 0),
1258                         .net = sa_path_get_ndev(rec) ?
1259                                 sa_path_get_ndev(rec) :
1260                                 &init_net
1261                 };
1262                 union {
1263                         struct sockaddr     _sockaddr;
1264                         struct sockaddr_in  _sockaddr_in;
1265                         struct sockaddr_in6 _sockaddr_in6;
1266                 } sgid_addr, dgid_addr;
1267
1268                 if (!device->get_netdev)
1269                         return -EOPNOTSUPP;
1270
1271                 rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
1272                 rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
1273
1274                 /* validate the route */
1275                 ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
1276                                             &dgid_addr._sockaddr, &dev_addr);
1277                 if (ret)
1278                         return ret;
1279
1280                 if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
1281                      dev_addr.network == RDMA_NETWORK_IPV6) &&
1282                     rec->rec_type != SA_PATH_REC_TYPE_ROCE_V2)
1283                         return -EINVAL;
1284
1285                 idev = device->get_netdev(device, port_num);
1286                 if (!idev)
1287                         return -ENODEV;
1288
1289                 resolved_dev = dev_get_by_index(dev_addr.net,
1290                                                 dev_addr.bound_dev_if);
1291                 if (resolved_dev->flags & IFF_LOOPBACK) {
1292                         dev_put(resolved_dev);
1293                         resolved_dev = idev;
1294                         dev_hold(resolved_dev);
1295                 }
1296                 ndev = ib_get_ndev_from_path(rec);
1297                 rcu_read_lock();
1298                 if ((ndev && ndev != resolved_dev) ||
1299                     (resolved_dev != idev &&
1300                      !rdma_is_upper_dev_rcu(idev, resolved_dev)))
1301                         ret = -EHOSTUNREACH;
1302                 rcu_read_unlock();
1303                 dev_put(idev);
1304                 dev_put(resolved_dev);
1305                 if (ret) {
1306                         if (ndev)
1307                                 dev_put(ndev);
1308                         return ret;
1309                 }
1310         }
1311
1312         if (rec->hop_limit > 0 || use_roce) {
1313                 enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
1314
1315                 ret = ib_find_cached_gid_by_port(device, &rec->sgid, type,
1316                                                  port_num, ndev, &gid_index);
1317                 if (ret) {
1318                         if (ndev)
1319                                 dev_put(ndev);
1320                         return ret;
1321                 }
1322
1323                 rdma_ah_set_grh(ah_attr, &rec->dgid,
1324                                 be32_to_cpu(rec->flow_label),
1325                                 gid_index, rec->hop_limit,
1326                                 rec->traffic_class);
1327                 if (ndev)
1328                         dev_put(ndev);
1329         }
1330
1331         if (use_roce) {
1332                 u8 *dmac = sa_path_get_dmac(rec);
1333
1334                 if (!dmac)
1335                         return -EINVAL;
1336                 memcpy(ah_attr->roce.dmac, dmac, ETH_ALEN);
1337         }
1338
1339         return 0;
1340 }
1341 EXPORT_SYMBOL(ib_init_ah_from_path);
1342
1343 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1344 {
1345         unsigned long flags;
1346
1347         spin_lock_irqsave(&query->port->ah_lock, flags);
1348         if (!query->port->sm_ah) {
1349                 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1350                 return -EAGAIN;
1351         }
1352         kref_get(&query->port->sm_ah->ref);
1353         query->sm_ah = query->port->sm_ah;
1354         spin_unlock_irqrestore(&query->port->ah_lock, flags);
1355
1356         query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1357                                             query->sm_ah->pkey_index,
1358                                             0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1359                                             gfp_mask,
1360                                             ((query->flags & IB_SA_QUERY_OPA) ?
1361                                              OPA_MGMT_BASE_VERSION :
1362                                              IB_MGMT_BASE_VERSION));
1363         if (IS_ERR(query->mad_buf)) {
1364                 kref_put(&query->sm_ah->ref, free_sm_ah);
1365                 return -ENOMEM;
1366         }
1367
1368         query->mad_buf->ah = query->sm_ah->ah;
1369
1370         return 0;
1371 }
1372
1373 static void free_mad(struct ib_sa_query *query)
1374 {
1375         ib_free_send_mad(query->mad_buf);
1376         kref_put(&query->sm_ah->ref, free_sm_ah);
1377 }
1378
1379 static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent)
1380 {
1381         struct ib_sa_mad *mad = query->mad_buf->mad;
1382         unsigned long flags;
1383
1384         memset(mad, 0, sizeof *mad);
1385
1386         if (query->flags & IB_SA_QUERY_OPA) {
1387                 mad->mad_hdr.base_version  = OPA_MGMT_BASE_VERSION;
1388                 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION;
1389         } else {
1390                 mad->mad_hdr.base_version  = IB_MGMT_BASE_VERSION;
1391                 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1392         }
1393         mad->mad_hdr.mgmt_class    = IB_MGMT_CLASS_SUBN_ADM;
1394         spin_lock_irqsave(&tid_lock, flags);
1395         mad->mad_hdr.tid           =
1396                 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1397         spin_unlock_irqrestore(&tid_lock, flags);
1398 }
1399
1400 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1401 {
1402         bool preload = gfpflags_allow_blocking(gfp_mask);
1403         unsigned long flags;
1404         int ret, id;
1405
1406         if (preload)
1407                 idr_preload(gfp_mask);
1408         spin_lock_irqsave(&idr_lock, flags);
1409
1410         id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1411
1412         spin_unlock_irqrestore(&idr_lock, flags);
1413         if (preload)
1414                 idr_preload_end();
1415         if (id < 0)
1416                 return id;
1417
1418         query->mad_buf->timeout_ms  = timeout_ms;
1419         query->mad_buf->context[0] = query;
1420         query->id = id;
1421
1422         if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) &&
1423             (!(query->flags & IB_SA_QUERY_OPA))) {
1424                 if (!ibnl_chk_listeners(RDMA_NL_GROUP_LS)) {
1425                         if (!ib_nl_make_request(query, gfp_mask))
1426                                 return id;
1427                 }
1428                 ib_sa_disable_local_svc(query);
1429         }
1430
1431         ret = ib_post_send_mad(query->mad_buf, NULL);
1432         if (ret) {
1433                 spin_lock_irqsave(&idr_lock, flags);
1434                 idr_remove(&query_idr, id);
1435                 spin_unlock_irqrestore(&idr_lock, flags);
1436         }
1437
1438         /*
1439          * It's not safe to dereference query any more, because the
1440          * send may already have completed and freed the query in
1441          * another context.
1442          */
1443         return ret ? ret : id;
1444 }
1445
1446 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
1447 {
1448         ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1449 }
1450 EXPORT_SYMBOL(ib_sa_unpack_path);
1451
1452 void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute)
1453 {
1454         ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1455 }
1456 EXPORT_SYMBOL(ib_sa_pack_path);
1457
1458 static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client,
1459                                          struct ib_device *device,
1460                                          u8 port_num)
1461 {
1462         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1463         struct ib_sa_port *port;
1464         unsigned long flags;
1465         bool ret = false;
1466
1467         if (!sa_dev)
1468                 return ret;
1469
1470         port = &sa_dev->port[port_num - sa_dev->start_port];
1471         spin_lock_irqsave(&port->classport_lock, flags);
1472         if (!port->classport_info.valid)
1473                 goto ret;
1474
1475         if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA)
1476                 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) &
1477                         OPA_CLASS_PORT_INFO_PR_SUPPORT;
1478 ret:
1479         spin_unlock_irqrestore(&port->classport_lock, flags);
1480         return ret;
1481 }
1482
1483 enum opa_pr_supported {
1484         PR_NOT_SUPPORTED,
1485         PR_OPA_SUPPORTED,
1486         PR_IB_SUPPORTED
1487 };
1488
1489 /**
1490  * Check if current PR query can be an OPA query.
1491  * Retuns PR_NOT_SUPPORTED if a path record query is not
1492  * possible, PR_OPA_SUPPORTED if an OPA path record query
1493  * is possible and PR_IB_SUPPORTED if an IB path record
1494  * query is possible.
1495  */
1496 static int opa_pr_query_possible(struct ib_sa_client *client,
1497                                  struct ib_device *device,
1498                                  u8 port_num,
1499                                  struct sa_path_rec *rec)
1500 {
1501         struct ib_port_attr port_attr;
1502
1503         if (ib_query_port(device, port_num, &port_attr))
1504                 return PR_NOT_SUPPORTED;
1505
1506         if (ib_sa_opa_pathrecord_support(client, device, port_num))
1507                 return PR_OPA_SUPPORTED;
1508
1509         if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1510                 return PR_NOT_SUPPORTED;
1511         else
1512                 return PR_IB_SUPPORTED;
1513 }
1514
1515 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1516                                     int status,
1517                                     struct ib_sa_mad *mad)
1518 {
1519         struct ib_sa_path_query *query =
1520                 container_of(sa_query, struct ib_sa_path_query, sa_query);
1521
1522         if (mad) {
1523                 struct sa_path_rec rec;
1524
1525                 if (sa_query->flags & IB_SA_QUERY_OPA) {
1526                         ib_unpack(opa_path_rec_table,
1527                                   ARRAY_SIZE(opa_path_rec_table),
1528                                   mad->data, &rec);
1529                         rec.rec_type = SA_PATH_REC_TYPE_OPA;
1530                         query->callback(status, &rec, query->context);
1531                 } else {
1532                         ib_unpack(path_rec_table,
1533                                   ARRAY_SIZE(path_rec_table),
1534                                   mad->data, &rec);
1535                         rec.rec_type = SA_PATH_REC_TYPE_IB;
1536                         sa_path_set_ndev(&rec, NULL);
1537                         sa_path_set_ifindex(&rec, 0);
1538                         sa_path_set_dmac_zero(&rec);
1539
1540                         if (query->conv_pr) {
1541                                 struct sa_path_rec opa;
1542
1543                                 memset(&opa, 0, sizeof(struct sa_path_rec));
1544                                 sa_convert_path_ib_to_opa(&opa, &rec);
1545                                 query->callback(status, &opa, query->context);
1546                         } else {
1547                                 query->callback(status, &rec, query->context);
1548                         }
1549                 }
1550         } else
1551                 query->callback(status, NULL, query->context);
1552 }
1553
1554 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1555 {
1556         struct ib_sa_path_query *query =
1557                 container_of(sa_query, struct ib_sa_path_query, sa_query);
1558
1559         kfree(query->conv_pr);
1560         kfree(query);
1561 }
1562
1563 /**
1564  * ib_sa_path_rec_get - Start a Path get query
1565  * @client:SA client
1566  * @device:device to send query on
1567  * @port_num: port number to send query on
1568  * @rec:Path Record to send in query
1569  * @comp_mask:component mask to send in query
1570  * @timeout_ms:time to wait for response
1571  * @gfp_mask:GFP mask to use for internal allocations
1572  * @callback:function called when query completes, times out or is
1573  * canceled
1574  * @context:opaque user context passed to callback
1575  * @sa_query:query context, used to cancel query
1576  *
1577  * Send a Path Record Get query to the SA to look up a path.  The
1578  * callback function will be called when the query completes (or
1579  * fails); status is 0 for a successful response, -EINTR if the query
1580  * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1581  * occurred sending the query.  The resp parameter of the callback is
1582  * only valid if status is 0.
1583  *
1584  * If the return value of ib_sa_path_rec_get() is negative, it is an
1585  * error code.  Otherwise it is a query ID that can be used to cancel
1586  * the query.
1587  */
1588 int ib_sa_path_rec_get(struct ib_sa_client *client,
1589                        struct ib_device *device, u8 port_num,
1590                        struct sa_path_rec *rec,
1591                        ib_sa_comp_mask comp_mask,
1592                        int timeout_ms, gfp_t gfp_mask,
1593                        void (*callback)(int status,
1594                                         struct sa_path_rec *resp,
1595                                         void *context),
1596                        void *context,
1597                        struct ib_sa_query **sa_query)
1598 {
1599         struct ib_sa_path_query *query;
1600         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1601         struct ib_sa_port   *port;
1602         struct ib_mad_agent *agent;
1603         struct ib_sa_mad *mad;
1604         enum opa_pr_supported status;
1605         int ret;
1606
1607         if (!sa_dev)
1608                 return -ENODEV;
1609
1610         if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1611             (rec->rec_type != SA_PATH_REC_TYPE_OPA))
1612                 return -EINVAL;
1613
1614         port  = &sa_dev->port[port_num - sa_dev->start_port];
1615         agent = port->agent;
1616
1617         query = kzalloc(sizeof(*query), gfp_mask);
1618         if (!query)
1619                 return -ENOMEM;
1620
1621         query->sa_query.port     = port;
1622         if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1623                 status = opa_pr_query_possible(client, device, port_num, rec);
1624                 if (status == PR_NOT_SUPPORTED) {
1625                         ret = -EINVAL;
1626                         goto err1;
1627                 } else if (status == PR_OPA_SUPPORTED) {
1628                         query->sa_query.flags |= IB_SA_QUERY_OPA;
1629                 } else {
1630                         query->conv_pr =
1631                                 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1632                         if (!query->conv_pr) {
1633                                 ret = -ENOMEM;
1634                                 goto err1;
1635                         }
1636                 }
1637         }
1638
1639         ret = alloc_mad(&query->sa_query, gfp_mask);
1640         if (ret)
1641                 goto err2;
1642
1643         ib_sa_client_get(client);
1644         query->sa_query.client = client;
1645         query->callback        = callback;
1646         query->context         = context;
1647
1648         mad = query->sa_query.mad_buf->mad;
1649         init_mad(&query->sa_query, agent);
1650
1651         query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1652         query->sa_query.release  = ib_sa_path_rec_release;
1653         mad->mad_hdr.method      = IB_MGMT_METHOD_GET;
1654         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1655         mad->sa_hdr.comp_mask    = comp_mask;
1656
1657         if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1658                 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1659                         rec, mad->data);
1660         } else if (query->conv_pr) {
1661                 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1662                 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1663                         query->conv_pr, mad->data);
1664         } else {
1665                 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1666                         rec, mad->data);
1667         }
1668
1669         *sa_query = &query->sa_query;
1670
1671         query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1672         query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1673                                                 query->conv_pr : rec;
1674
1675         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1676         if (ret < 0)
1677                 goto err3;
1678
1679         return ret;
1680
1681 err3:
1682         *sa_query = NULL;
1683         ib_sa_client_put(query->sa_query.client);
1684         free_mad(&query->sa_query);
1685 err2:
1686         kfree(query->conv_pr);
1687 err1:
1688         kfree(query);
1689         return ret;
1690 }
1691 EXPORT_SYMBOL(ib_sa_path_rec_get);
1692
1693 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1694                                     int status,
1695                                     struct ib_sa_mad *mad)
1696 {
1697         struct ib_sa_service_query *query =
1698                 container_of(sa_query, struct ib_sa_service_query, sa_query);
1699
1700         if (mad) {
1701                 struct ib_sa_service_rec rec;
1702
1703                 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1704                           mad->data, &rec);
1705                 query->callback(status, &rec, query->context);
1706         } else
1707                 query->callback(status, NULL, query->context);
1708 }
1709
1710 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1711 {
1712         kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1713 }
1714
1715 /**
1716  * ib_sa_service_rec_query - Start Service Record operation
1717  * @client:SA client
1718  * @device:device to send request on
1719  * @port_num: port number to send request on
1720  * @method:SA method - should be get, set, or delete
1721  * @rec:Service Record to send in request
1722  * @comp_mask:component mask to send in request
1723  * @timeout_ms:time to wait for response
1724  * @gfp_mask:GFP mask to use for internal allocations
1725  * @callback:function called when request completes, times out or is
1726  * canceled
1727  * @context:opaque user context passed to callback
1728  * @sa_query:request context, used to cancel request
1729  *
1730  * Send a Service Record set/get/delete to the SA to register,
1731  * unregister or query a service record.
1732  * The callback function will be called when the request completes (or
1733  * fails); status is 0 for a successful response, -EINTR if the query
1734  * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1735  * occurred sending the query.  The resp parameter of the callback is
1736  * only valid if status is 0.
1737  *
1738  * If the return value of ib_sa_service_rec_query() is negative, it is an
1739  * error code.  Otherwise it is a request ID that can be used to cancel
1740  * the query.
1741  */
1742 int ib_sa_service_rec_query(struct ib_sa_client *client,
1743                             struct ib_device *device, u8 port_num, u8 method,
1744                             struct ib_sa_service_rec *rec,
1745                             ib_sa_comp_mask comp_mask,
1746                             int timeout_ms, gfp_t gfp_mask,
1747                             void (*callback)(int status,
1748                                              struct ib_sa_service_rec *resp,
1749                                              void *context),
1750                             void *context,
1751                             struct ib_sa_query **sa_query)
1752 {
1753         struct ib_sa_service_query *query;
1754         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1755         struct ib_sa_port   *port;
1756         struct ib_mad_agent *agent;
1757         struct ib_sa_mad *mad;
1758         int ret;
1759
1760         if (!sa_dev)
1761                 return -ENODEV;
1762
1763         port  = &sa_dev->port[port_num - sa_dev->start_port];
1764         agent = port->agent;
1765
1766         if (method != IB_MGMT_METHOD_GET &&
1767             method != IB_MGMT_METHOD_SET &&
1768             method != IB_SA_METHOD_DELETE)
1769                 return -EINVAL;
1770
1771         query = kzalloc(sizeof(*query), gfp_mask);
1772         if (!query)
1773                 return -ENOMEM;
1774
1775         query->sa_query.port     = port;
1776         ret = alloc_mad(&query->sa_query, gfp_mask);
1777         if (ret)
1778                 goto err1;
1779
1780         ib_sa_client_get(client);
1781         query->sa_query.client = client;
1782         query->callback        = callback;
1783         query->context         = context;
1784
1785         mad = query->sa_query.mad_buf->mad;
1786         init_mad(&query->sa_query, agent);
1787
1788         query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1789         query->sa_query.release  = ib_sa_service_rec_release;
1790         mad->mad_hdr.method      = method;
1791         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1792         mad->sa_hdr.comp_mask    = comp_mask;
1793
1794         ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1795                 rec, mad->data);
1796
1797         *sa_query = &query->sa_query;
1798
1799         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1800         if (ret < 0)
1801                 goto err2;
1802
1803         return ret;
1804
1805 err2:
1806         *sa_query = NULL;
1807         ib_sa_client_put(query->sa_query.client);
1808         free_mad(&query->sa_query);
1809
1810 err1:
1811         kfree(query);
1812         return ret;
1813 }
1814 EXPORT_SYMBOL(ib_sa_service_rec_query);
1815
1816 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1817                                         int status,
1818                                         struct ib_sa_mad *mad)
1819 {
1820         struct ib_sa_mcmember_query *query =
1821                 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1822
1823         if (mad) {
1824                 struct ib_sa_mcmember_rec rec;
1825
1826                 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1827                           mad->data, &rec);
1828                 query->callback(status, &rec, query->context);
1829         } else
1830                 query->callback(status, NULL, query->context);
1831 }
1832
1833 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1834 {
1835         kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1836 }
1837
1838 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1839                              struct ib_device *device, u8 port_num,
1840                              u8 method,
1841                              struct ib_sa_mcmember_rec *rec,
1842                              ib_sa_comp_mask comp_mask,
1843                              int timeout_ms, gfp_t gfp_mask,
1844                              void (*callback)(int status,
1845                                               struct ib_sa_mcmember_rec *resp,
1846                                               void *context),
1847                              void *context,
1848                              struct ib_sa_query **sa_query)
1849 {
1850         struct ib_sa_mcmember_query *query;
1851         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1852         struct ib_sa_port   *port;
1853         struct ib_mad_agent *agent;
1854         struct ib_sa_mad *mad;
1855         int ret;
1856
1857         if (!sa_dev)
1858                 return -ENODEV;
1859
1860         port  = &sa_dev->port[port_num - sa_dev->start_port];
1861         agent = port->agent;
1862
1863         query = kzalloc(sizeof(*query), gfp_mask);
1864         if (!query)
1865                 return -ENOMEM;
1866
1867         query->sa_query.port     = port;
1868         ret = alloc_mad(&query->sa_query, gfp_mask);
1869         if (ret)
1870                 goto err1;
1871
1872         ib_sa_client_get(client);
1873         query->sa_query.client = client;
1874         query->callback        = callback;
1875         query->context         = context;
1876
1877         mad = query->sa_query.mad_buf->mad;
1878         init_mad(&query->sa_query, agent);
1879
1880         query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1881         query->sa_query.release  = ib_sa_mcmember_rec_release;
1882         mad->mad_hdr.method      = method;
1883         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1884         mad->sa_hdr.comp_mask    = comp_mask;
1885
1886         ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1887                 rec, mad->data);
1888
1889         *sa_query = &query->sa_query;
1890
1891         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1892         if (ret < 0)
1893                 goto err2;
1894
1895         return ret;
1896
1897 err2:
1898         *sa_query = NULL;
1899         ib_sa_client_put(query->sa_query.client);
1900         free_mad(&query->sa_query);
1901
1902 err1:
1903         kfree(query);
1904         return ret;
1905 }
1906
1907 /* Support GuidInfoRecord */
1908 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1909                                         int status,
1910                                         struct ib_sa_mad *mad)
1911 {
1912         struct ib_sa_guidinfo_query *query =
1913                 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1914
1915         if (mad) {
1916                 struct ib_sa_guidinfo_rec rec;
1917
1918                 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1919                           mad->data, &rec);
1920                 query->callback(status, &rec, query->context);
1921         } else
1922                 query->callback(status, NULL, query->context);
1923 }
1924
1925 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1926 {
1927         kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1928 }
1929
1930 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1931                               struct ib_device *device, u8 port_num,
1932                               struct ib_sa_guidinfo_rec *rec,
1933                               ib_sa_comp_mask comp_mask, u8 method,
1934                               int timeout_ms, gfp_t gfp_mask,
1935                               void (*callback)(int status,
1936                                                struct ib_sa_guidinfo_rec *resp,
1937                                                void *context),
1938                               void *context,
1939                               struct ib_sa_query **sa_query)
1940 {
1941         struct ib_sa_guidinfo_query *query;
1942         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1943         struct ib_sa_port *port;
1944         struct ib_mad_agent *agent;
1945         struct ib_sa_mad *mad;
1946         int ret;
1947
1948         if (!sa_dev)
1949                 return -ENODEV;
1950
1951         if (method != IB_MGMT_METHOD_GET &&
1952             method != IB_MGMT_METHOD_SET &&
1953             method != IB_SA_METHOD_DELETE) {
1954                 return -EINVAL;
1955         }
1956
1957         port  = &sa_dev->port[port_num - sa_dev->start_port];
1958         agent = port->agent;
1959
1960         query = kzalloc(sizeof(*query), gfp_mask);
1961         if (!query)
1962                 return -ENOMEM;
1963
1964         query->sa_query.port = port;
1965         ret = alloc_mad(&query->sa_query, gfp_mask);
1966         if (ret)
1967                 goto err1;
1968
1969         ib_sa_client_get(client);
1970         query->sa_query.client = client;
1971         query->callback        = callback;
1972         query->context         = context;
1973
1974         mad = query->sa_query.mad_buf->mad;
1975         init_mad(&query->sa_query, agent);
1976
1977         query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1978         query->sa_query.release  = ib_sa_guidinfo_rec_release;
1979
1980         mad->mad_hdr.method      = method;
1981         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1982         mad->sa_hdr.comp_mask    = comp_mask;
1983
1984         ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1985                 mad->data);
1986
1987         *sa_query = &query->sa_query;
1988
1989         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1990         if (ret < 0)
1991                 goto err2;
1992
1993         return ret;
1994
1995 err2:
1996         *sa_query = NULL;
1997         ib_sa_client_put(query->sa_query.client);
1998         free_mad(&query->sa_query);
1999
2000 err1:
2001         kfree(query);
2002         return ret;
2003 }
2004 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
2005
2006 bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
2007                                     struct ib_device *device,
2008                                     u8 port_num)
2009 {
2010         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
2011         struct ib_sa_port *port;
2012         bool ret = false;
2013         unsigned long flags;
2014
2015         if (!sa_dev)
2016                 return ret;
2017
2018         port  = &sa_dev->port[port_num - sa_dev->start_port];
2019
2020         spin_lock_irqsave(&port->classport_lock, flags);
2021         if ((port->classport_info.valid) &&
2022             (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
2023                 ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
2024                         & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
2025         spin_unlock_irqrestore(&port->classport_lock, flags);
2026         return ret;
2027 }
2028 EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
2029
2030 struct ib_classport_info_context {
2031         struct completion       done;
2032         struct ib_sa_query      *sa_query;
2033 };
2034
2035 static void ib_classportinfo_cb(void *context)
2036 {
2037         struct ib_classport_info_context *cb_ctx = context;
2038
2039         complete(&cb_ctx->done);
2040 }
2041
2042 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
2043                                               int status,
2044                                               struct ib_sa_mad *mad)
2045 {
2046         unsigned long flags;
2047         struct ib_sa_classport_info_query *query =
2048                 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
2049         struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
2050
2051         if (mad) {
2052                 if (sa_query->flags & IB_SA_QUERY_OPA) {
2053                         struct opa_class_port_info rec;
2054
2055                         ib_unpack(opa_classport_info_rec_table,
2056                                   ARRAY_SIZE(opa_classport_info_rec_table),
2057                                   mad->data, &rec);
2058
2059                         spin_lock_irqsave(&sa_query->port->classport_lock,
2060                                           flags);
2061                         if (!status && !info->valid) {
2062                                 memcpy(&info->data.opa, &rec,
2063                                        sizeof(info->data.opa));
2064
2065                                 info->valid = true;
2066                                 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
2067                         }
2068                         spin_unlock_irqrestore(&sa_query->port->classport_lock,
2069                                                flags);
2070
2071                 } else {
2072                         struct ib_class_port_info rec;
2073
2074                         ib_unpack(ib_classport_info_rec_table,
2075                                   ARRAY_SIZE(ib_classport_info_rec_table),
2076                                   mad->data, &rec);
2077
2078                         spin_lock_irqsave(&sa_query->port->classport_lock,
2079                                           flags);
2080                         if (!status && !info->valid) {
2081                                 memcpy(&info->data.ib, &rec,
2082                                        sizeof(info->data.ib));
2083
2084                                 info->valid = true;
2085                                 info->data.type = RDMA_CLASS_PORT_INFO_IB;
2086                         }
2087                         spin_unlock_irqrestore(&sa_query->port->classport_lock,
2088                                                flags);
2089                 }
2090         }
2091         query->callback(query->context);
2092 }
2093
2094 static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
2095 {
2096         kfree(container_of(sa_query, struct ib_sa_classport_info_query,
2097                            sa_query));
2098 }
2099
2100 static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
2101                                           int timeout_ms,
2102                                           void (*callback)(void *context),
2103                                           void *context,
2104                                           struct ib_sa_query **sa_query)
2105 {
2106         struct ib_mad_agent *agent;
2107         struct ib_sa_classport_info_query *query;
2108         struct ib_sa_mad *mad;
2109         gfp_t gfp_mask = GFP_KERNEL;
2110         int ret;
2111
2112         agent = port->agent;
2113
2114         query = kzalloc(sizeof(*query), gfp_mask);
2115         if (!query)
2116                 return -ENOMEM;
2117
2118         query->sa_query.port = port;
2119         query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
2120                                                  port->port_num) ?
2121                                  IB_SA_QUERY_OPA : 0;
2122         ret = alloc_mad(&query->sa_query, gfp_mask);
2123         if (ret)
2124                 goto err_free;
2125
2126         query->callback = callback;
2127         query->context = context;
2128
2129         mad = query->sa_query.mad_buf->mad;
2130         init_mad(&query->sa_query, agent);
2131
2132         query->sa_query.callback = ib_sa_classport_info_rec_callback;
2133         query->sa_query.release  = ib_sa_classport_info_rec_release;
2134         mad->mad_hdr.method      = IB_MGMT_METHOD_GET;
2135         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
2136         mad->sa_hdr.comp_mask    = 0;
2137         *sa_query = &query->sa_query;
2138
2139         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2140         if (ret < 0)
2141                 goto err_free_mad;
2142
2143         return ret;
2144
2145 err_free_mad:
2146         *sa_query = NULL;
2147         free_mad(&query->sa_query);
2148
2149 err_free:
2150         kfree(query);
2151         return ret;
2152 }
2153
2154 static void update_ib_cpi(struct work_struct *work)
2155 {
2156         struct ib_sa_port *port =
2157                 container_of(work, struct ib_sa_port, ib_cpi_work.work);
2158         struct ib_classport_info_context *cb_context;
2159         unsigned long flags;
2160         int ret;
2161
2162         /* If the classport info is valid, nothing
2163          * to do here.
2164          */
2165         spin_lock_irqsave(&port->classport_lock, flags);
2166         if (port->classport_info.valid) {
2167                 spin_unlock_irqrestore(&port->classport_lock, flags);
2168                 return;
2169         }
2170         spin_unlock_irqrestore(&port->classport_lock, flags);
2171
2172         cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
2173         if (!cb_context)
2174                 goto err_nomem;
2175
2176         init_completion(&cb_context->done);
2177
2178         ret = ib_sa_classport_info_rec_query(port, 3000,
2179                                              ib_classportinfo_cb, cb_context,
2180                                              &cb_context->sa_query);
2181         if (ret < 0)
2182                 goto free_cb_err;
2183         wait_for_completion(&cb_context->done);
2184 free_cb_err:
2185         kfree(cb_context);
2186         spin_lock_irqsave(&port->classport_lock, flags);
2187
2188         /* If the classport info is still not valid, the query should have
2189          * failed for some reason. Retry issuing the query
2190          */
2191         if (!port->classport_info.valid) {
2192                 port->classport_info.retry_cnt++;
2193                 if (port->classport_info.retry_cnt <=
2194                     IB_SA_CPI_MAX_RETRY_CNT) {
2195                         unsigned long delay =
2196                                 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2197
2198                         queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
2199                 }
2200         }
2201         spin_unlock_irqrestore(&port->classport_lock, flags);
2202
2203 err_nomem:
2204         return;
2205 }
2206
2207 static void send_handler(struct ib_mad_agent *agent,
2208                          struct ib_mad_send_wc *mad_send_wc)
2209 {
2210         struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
2211         unsigned long flags;
2212
2213         if (query->callback)
2214                 switch (mad_send_wc->status) {
2215                 case IB_WC_SUCCESS:
2216                         /* No callback -- already got recv */
2217                         break;
2218                 case IB_WC_RESP_TIMEOUT_ERR:
2219                         query->callback(query, -ETIMEDOUT, NULL);
2220                         break;
2221                 case IB_WC_WR_FLUSH_ERR:
2222                         query->callback(query, -EINTR, NULL);
2223                         break;
2224                 default:
2225                         query->callback(query, -EIO, NULL);
2226                         break;
2227                 }
2228
2229         spin_lock_irqsave(&idr_lock, flags);
2230         idr_remove(&query_idr, query->id);
2231         spin_unlock_irqrestore(&idr_lock, flags);
2232
2233         free_mad(query);
2234         if (query->client)
2235                 ib_sa_client_put(query->client);
2236         query->release(query);
2237 }
2238
2239 static void recv_handler(struct ib_mad_agent *mad_agent,
2240                          struct ib_mad_send_buf *send_buf,
2241                          struct ib_mad_recv_wc *mad_recv_wc)
2242 {
2243         struct ib_sa_query *query;
2244
2245         if (!send_buf)
2246                 return;
2247
2248         query = send_buf->context[0];
2249         if (query->callback) {
2250                 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2251                         query->callback(query,
2252                                         mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2253                                         -EINVAL : 0,
2254                                         (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2255                 else
2256                         query->callback(query, -EIO, NULL);
2257         }
2258
2259         ib_free_recv_mad(mad_recv_wc);
2260 }
2261
2262 static void update_sm_ah(struct work_struct *work)
2263 {
2264         struct ib_sa_port *port =
2265                 container_of(work, struct ib_sa_port, update_task);
2266         struct ib_sa_sm_ah *new_ah;
2267         struct ib_port_attr port_attr;
2268         struct rdma_ah_attr   ah_attr;
2269
2270         if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2271                 pr_warn("Couldn't query port\n");
2272                 return;
2273         }
2274
2275         new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2276         if (!new_ah)
2277                 return;
2278
2279         kref_init(&new_ah->ref);
2280         new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2281
2282         new_ah->pkey_index = 0;
2283         if (ib_find_pkey(port->agent->device, port->port_num,
2284                          IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2285                 pr_err("Couldn't find index for default PKey\n");
2286
2287         memset(&ah_attr, 0, sizeof(ah_attr));
2288         ah_attr.type = rdma_ah_find_type(port->agent->device,
2289                                          port->port_num);
2290         rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2291         rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2292         rdma_ah_set_port_num(&ah_attr, port->port_num);
2293         if (port_attr.grh_required) {
2294                 rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2295
2296                 rdma_ah_set_subnet_prefix(&ah_attr,
2297                                           cpu_to_be64(port_attr.subnet_prefix));
2298                 rdma_ah_set_interface_id(&ah_attr,
2299                                          cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2300         }
2301
2302         new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr);
2303         if (IS_ERR(new_ah->ah)) {
2304                 pr_warn("Couldn't create new SM AH\n");
2305                 kfree(new_ah);
2306                 return;
2307         }
2308
2309         spin_lock_irq(&port->ah_lock);
2310         if (port->sm_ah)
2311                 kref_put(&port->sm_ah->ref, free_sm_ah);
2312         port->sm_ah = new_ah;
2313         spin_unlock_irq(&port->ah_lock);
2314 }
2315
2316 static void ib_sa_event(struct ib_event_handler *handler,
2317                         struct ib_event *event)
2318 {
2319         if (event->event == IB_EVENT_PORT_ERR    ||
2320             event->event == IB_EVENT_PORT_ACTIVE ||
2321             event->event == IB_EVENT_LID_CHANGE  ||
2322             event->event == IB_EVENT_PKEY_CHANGE ||
2323             event->event == IB_EVENT_SM_CHANGE   ||
2324             event->event == IB_EVENT_CLIENT_REREGISTER) {
2325                 unsigned long flags;
2326                 struct ib_sa_device *sa_dev =
2327                         container_of(handler, typeof(*sa_dev), event_handler);
2328                 u8 port_num = event->element.port_num - sa_dev->start_port;
2329                 struct ib_sa_port *port = &sa_dev->port[port_num];
2330
2331                 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2332                         return;
2333
2334                 spin_lock_irqsave(&port->ah_lock, flags);
2335                 if (port->sm_ah)
2336                         kref_put(&port->sm_ah->ref, free_sm_ah);
2337                 port->sm_ah = NULL;
2338                 spin_unlock_irqrestore(&port->ah_lock, flags);
2339
2340                 if (event->event == IB_EVENT_SM_CHANGE ||
2341                     event->event == IB_EVENT_CLIENT_REREGISTER ||
2342                     event->event == IB_EVENT_LID_CHANGE ||
2343                     event->event == IB_EVENT_PORT_ACTIVE) {
2344                         unsigned long delay =
2345                                 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2346
2347                         spin_lock_irqsave(&port->classport_lock, flags);
2348                         port->classport_info.valid = false;
2349                         port->classport_info.retry_cnt = 0;
2350                         spin_unlock_irqrestore(&port->classport_lock, flags);
2351                         queue_delayed_work(ib_wq,
2352                                            &port->ib_cpi_work, delay);
2353                 }
2354                 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2355         }
2356 }
2357
2358 static void ib_sa_add_one(struct ib_device *device)
2359 {
2360         struct ib_sa_device *sa_dev;
2361         int s, e, i;
2362         int count = 0;
2363
2364         s = rdma_start_port(device);
2365         e = rdma_end_port(device);
2366
2367         sa_dev = kzalloc(sizeof *sa_dev +
2368                          (e - s + 1) * sizeof (struct ib_sa_port),
2369                          GFP_KERNEL);
2370         if (!sa_dev)
2371                 return;
2372
2373         sa_dev->start_port = s;
2374         sa_dev->end_port   = e;
2375
2376         for (i = 0; i <= e - s; ++i) {
2377                 spin_lock_init(&sa_dev->port[i].ah_lock);
2378                 if (!rdma_cap_ib_sa(device, i + 1))
2379                         continue;
2380
2381                 sa_dev->port[i].sm_ah    = NULL;
2382                 sa_dev->port[i].port_num = i + s;
2383
2384                 spin_lock_init(&sa_dev->port[i].classport_lock);
2385                 sa_dev->port[i].classport_info.valid = false;
2386
2387                 sa_dev->port[i].agent =
2388                         ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2389                                               NULL, 0, send_handler,
2390                                               recv_handler, sa_dev, 0);
2391                 if (IS_ERR(sa_dev->port[i].agent))
2392                         goto err;
2393
2394                 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
2395                 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2396                                   update_ib_cpi);
2397
2398                 count++;
2399         }
2400
2401         if (!count)
2402                 goto free;
2403
2404         ib_set_client_data(device, &sa_client, sa_dev);
2405
2406         /*
2407          * We register our event handler after everything is set up,
2408          * and then update our cached info after the event handler is
2409          * registered to avoid any problems if a port changes state
2410          * during our initialization.
2411          */
2412
2413         INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
2414         if (ib_register_event_handler(&sa_dev->event_handler))
2415                 goto err;
2416
2417         for (i = 0; i <= e - s; ++i) {
2418                 if (rdma_cap_ib_sa(device, i + 1))
2419                         update_sm_ah(&sa_dev->port[i].update_task);
2420         }
2421
2422         return;
2423
2424 err:
2425         while (--i >= 0) {
2426                 if (rdma_cap_ib_sa(device, i + 1))
2427                         ib_unregister_mad_agent(sa_dev->port[i].agent);
2428         }
2429 free:
2430         kfree(sa_dev);
2431         return;
2432 }
2433
2434 static void ib_sa_remove_one(struct ib_device *device, void *client_data)
2435 {
2436         struct ib_sa_device *sa_dev = client_data;
2437         int i;
2438
2439         if (!sa_dev)
2440                 return;
2441
2442         ib_unregister_event_handler(&sa_dev->event_handler);
2443         flush_workqueue(ib_wq);
2444
2445         for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
2446                 if (rdma_cap_ib_sa(device, i + 1)) {
2447                         cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
2448                         ib_unregister_mad_agent(sa_dev->port[i].agent);
2449                         if (sa_dev->port[i].sm_ah)
2450                                 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2451                 }
2452
2453         }
2454
2455         kfree(sa_dev);
2456 }
2457
2458 int ib_sa_init(void)
2459 {
2460         int ret;
2461
2462         get_random_bytes(&tid, sizeof tid);
2463
2464         atomic_set(&ib_nl_sa_request_seq, 0);
2465
2466         ret = ib_register_client(&sa_client);
2467         if (ret) {
2468                 pr_err("Couldn't register ib_sa client\n");
2469                 goto err1;
2470         }
2471
2472         ret = mcast_init();
2473         if (ret) {
2474                 pr_err("Couldn't initialize multicast handling\n");
2475                 goto err2;
2476         }
2477
2478         ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2479         if (!ib_nl_wq) {
2480                 ret = -ENOMEM;
2481                 goto err3;
2482         }
2483
2484         INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2485
2486         return 0;
2487
2488 err3:
2489         mcast_cleanup();
2490 err2:
2491         ib_unregister_client(&sa_client);
2492 err1:
2493         return ret;
2494 }
2495
2496 void ib_sa_cleanup(void)
2497 {
2498         cancel_delayed_work(&ib_nl_timed_work);
2499         flush_workqueue(ib_nl_wq);
2500         destroy_workqueue(ib_nl_wq);
2501         mcast_cleanup();
2502         ib_unregister_client(&sa_client);
2503         idr_destroy(&query_idr);
2504 }