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/xarray.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 <rdma/opa_addr.h>
  54 #include "sa.h"
  55 #include "core_priv.h"
  56
  57 #define IB_SA_LOCAL_SVC_TIMEOUT_MIN             100
  58 #define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT         2000
  59 #define IB_SA_LOCAL_SVC_TIMEOUT_MAX             200000
  60 #define IB_SA_CPI_MAX_RETRY_CNT                 3
  61 #define IB_SA_CPI_RETRY_WAIT                    1000 /*msecs */
  62 static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
  63
  64 struct ib_sa_sm_ah {
  65         struct ib_ah        *ah;
  66         struct kref          ref;
  67         u16                  pkey_index;
  68         u8                   src_path_mask;
  69 };
  70
  71 enum rdma_class_port_info_type {
  72         RDMA_CLASS_PORT_INFO_IB,
  73         RDMA_CLASS_PORT_INFO_OPA
  74 };
  75
  76 struct rdma_class_port_info {
  77         enum rdma_class_port_info_type type;
  78         union {
  79                 struct ib_class_port_info ib;
  80                 struct opa_class_port_info opa;
  81         };
  82 };
  83
  84 struct ib_sa_classport_cache {
  85         bool valid;
  86         int retry_cnt;
  87         struct rdma_class_port_info data;
  88 };
  89
  90 struct ib_sa_port {
  91         struct ib_mad_agent *agent;
  92         struct ib_sa_sm_ah  *sm_ah;
  93         struct work_struct   update_task;
  94         struct ib_sa_classport_cache classport_info;
  95         struct delayed_work ib_cpi_work;
  96         spinlock_t                   classport_lock; /* protects class port info set */
  97         spinlock_t           ah_lock;
  98         u8                   port_num;
  99 };
 100
 101 struct ib_sa_device {
 102         int                     start_port, end_port;
 103         struct ib_event_handler event_handler;
 104         struct ib_sa_port port[0];
 105 };
 106
 107 struct ib_sa_query {
 108         void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
 109         void (*release)(struct ib_sa_query *);
 110         struct ib_sa_client    *client;
 111         struct ib_sa_port      *port;
 112         struct ib_mad_send_buf *mad_buf;
 113         struct ib_sa_sm_ah     *sm_ah;
 114         int                     id;
 115         u32                     flags;
 116         struct list_head        list; /* Local svc request list */
 117         u32                     seq; /* Local svc request sequence number */
 118         unsigned long           timeout; /* Local svc timeout */
 119         u8                      path_use; /* How will the pathrecord be used */
 120 };
 121
 122 #define IB_SA_ENABLE_LOCAL_SERVICE      0x00000001
 123 #define IB_SA_CANCEL                    0x00000002
 124 #define IB_SA_QUERY_OPA                 0x00000004
 125
 126 struct ib_sa_service_query {
 127         void (*callback)(int, struct ib_sa_service_rec *, void *);
 128         void *context;
 129         struct ib_sa_query sa_query;
 130 };
 131
 132 struct ib_sa_path_query {
 133         void (*callback)(int, struct sa_path_rec *, void *);
 134         void *context;
 135         struct ib_sa_query sa_query;
 136         struct sa_path_rec *conv_pr;
 137 };
 138
 139 struct ib_sa_guidinfo_query {
 140         void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
 141         void *context;
 142         struct ib_sa_query sa_query;
 143 };
 144
 145 struct ib_sa_classport_info_query {
 146         void (*callback)(void *);
 147         void *context;
 148         struct ib_sa_query sa_query;
 149 };
 150
 151 struct ib_sa_mcmember_query {
 152         void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
 153         void *context;
 154         struct ib_sa_query sa_query;
 155 };
 156
 157 static LIST_HEAD(ib_nl_request_list);
 158 static DEFINE_SPINLOCK(ib_nl_request_lock);
 159 static atomic_t ib_nl_sa_request_seq;
 160 static struct workqueue_struct *ib_nl_wq;
 161 static struct delayed_work ib_nl_timed_work;
 162 static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
 163         [LS_NLA_TYPE_PATH_RECORD]       = {.type = NLA_BINARY,
 164                 .len = sizeof(struct ib_path_rec_data)},
 165         [LS_NLA_TYPE_TIMEOUT]           = {.type = NLA_U32},
 166         [LS_NLA_TYPE_SERVICE_ID]        = {.type = NLA_U64},
 167         [LS_NLA_TYPE_DGID]              = {.type = NLA_BINARY,
 168                 .len = sizeof(struct rdma_nla_ls_gid)},
 169         [LS_NLA_TYPE_SGID]              = {.type = NLA_BINARY,
 170                 .len = sizeof(struct rdma_nla_ls_gid)},
 171         [LS_NLA_TYPE_TCLASS]            = {.type = NLA_U8},
 172         [LS_NLA_TYPE_PKEY]              = {.type = NLA_U16},
 173         [LS_NLA_TYPE_QOS_CLASS]         = {.type = NLA_U16},
 174 };
 175
 176
 177 static void ib_sa_add_one(struct ib_device *device);
 178 static void ib_sa_remove_one(struct ib_device *device, void *client_data);
 179
 180 static struct ib_client sa_client = {
 181         .name   = "sa",
 182         .add    = ib_sa_add_one,
 183         .remove = ib_sa_remove_one
 184 };
 185
 186 static DEFINE_XARRAY_FLAGS(queries, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
 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 = skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
 763         memcpy(header->device_name, dev_name(&query->port->agent->device->dev),
 764                LS_DEVICE_NAME_MAX);
 765         header->port_num = query->port->port_num;
 766
 767         if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
 768             sa_rec->reversible != 0)
 769                 query->path_use = LS_RESOLVE_PATH_USE_GMP;
 770         else
 771                 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
 772         header->path_use = query->path_use;
 773
 774         /* Now build the attributes */
 775         if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
 776                 val64 = be64_to_cpu(sa_rec->service_id);
 777                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
 778                         sizeof(val64), &val64);
 779         }
 780         if (comp_mask & IB_SA_PATH_REC_DGID)
 781                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
 782                         sizeof(sa_rec->dgid), &sa_rec->dgid);
 783         if (comp_mask & IB_SA_PATH_REC_SGID)
 784                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
 785                         sizeof(sa_rec->sgid), &sa_rec->sgid);
 786         if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
 787                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
 788                         sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
 789
 790         if (comp_mask & IB_SA_PATH_REC_PKEY) {
 791                 val16 = be16_to_cpu(sa_rec->pkey);
 792                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
 793                         sizeof(val16), &val16);
 794         }
 795         if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
 796                 val16 = be16_to_cpu(sa_rec->qos_class);
 797                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
 798                         sizeof(val16), &val16);
 799         }
 800 }
 801
 802 static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
 803 {
 804         int len = 0;
 805
 806         if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
 807                 len += nla_total_size(sizeof(u64));
 808         if (comp_mask & IB_SA_PATH_REC_DGID)
 809                 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
 810         if (comp_mask & IB_SA_PATH_REC_SGID)
 811                 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
 812         if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
 813                 len += nla_total_size(sizeof(u8));
 814         if (comp_mask & IB_SA_PATH_REC_PKEY)
 815                 len += nla_total_size(sizeof(u16));
 816         if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
 817                 len += nla_total_size(sizeof(u16));
 818
 819         /*
 820          * Make sure that at least some of the required comp_mask bits are
 821          * set.
 822          */
 823         if (WARN_ON(len == 0))
 824                 return len;
 825
 826         /* Add the family header */
 827         len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
 828
 829         return len;
 830 }
 831
 832 static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
 833 {
 834         struct sk_buff *skb = NULL;
 835         struct nlmsghdr *nlh;
 836         void *data;
 837         struct ib_sa_mad *mad;
 838         int len;
 839
 840         mad = query->mad_buf->mad;
 841         len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
 842         if (len <= 0)
 843                 return -EMSGSIZE;
 844
 845         skb = nlmsg_new(len, gfp_mask);
 846         if (!skb)
 847                 return -ENOMEM;
 848
 849         /* Put nlmsg header only for now */
 850         data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
 851                             RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
 852         if (!data) {
 853                 nlmsg_free(skb);
 854                 return -EMSGSIZE;
 855         }
 856
 857         /* Add attributes */
 858         ib_nl_set_path_rec_attrs(skb, query);
 859
 860         /* Repair the nlmsg header length */
 861         nlmsg_end(skb, nlh);
 862
 863         return rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_LS, gfp_mask);
 864 }
 865
 866 static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
 867 {
 868         unsigned long flags;
 869         unsigned long delay;
 870         int ret;
 871
 872         INIT_LIST_HEAD(&query->list);
 873         query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
 874
 875         /* Put the request on the list first.*/
 876         spin_lock_irqsave(&ib_nl_request_lock, flags);
 877         delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
 878         query->timeout = delay + jiffies;
 879         list_add_tail(&query->list, &ib_nl_request_list);
 880         /* Start the timeout if this is the only request */
 881         if (ib_nl_request_list.next == &query->list)
 882                 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
 883         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 884
 885         ret = ib_nl_send_msg(query, gfp_mask);
 886         if (ret) {
 887                 ret = -EIO;
 888                 /* Remove the request */
 889                 spin_lock_irqsave(&ib_nl_request_lock, flags);
 890                 list_del(&query->list);
 891                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 892         }
 893
 894         return ret;
 895 }
 896
 897 static int ib_nl_cancel_request(struct ib_sa_query *query)
 898 {
 899         unsigned long flags;
 900         struct ib_sa_query *wait_query;
 901         int found = 0;
 902
 903         spin_lock_irqsave(&ib_nl_request_lock, flags);
 904         list_for_each_entry(wait_query, &ib_nl_request_list, list) {
 905                 /* Let the timeout to take care of the callback */
 906                 if (query == wait_query) {
 907                         query->flags |= IB_SA_CANCEL;
 908                         query->timeout = jiffies;
 909                         list_move(&query->list, &ib_nl_request_list);
 910                         found = 1;
 911                         mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
 912                         break;
 913                 }
 914         }
 915         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 916
 917         return found;
 918 }
 919
 920 static void send_handler(struct ib_mad_agent *agent,
 921                          struct ib_mad_send_wc *mad_send_wc);
 922
 923 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
 924                                            const struct nlmsghdr *nlh)
 925 {
 926         struct ib_mad_send_wc mad_send_wc;
 927         struct ib_sa_mad *mad = NULL;
 928         const struct nlattr *head, *curr;
 929         struct ib_path_rec_data  *rec;
 930         int len, rem;
 931         u32 mask = 0;
 932         int status = -EIO;
 933
 934         if (query->callback) {
 935                 head = (const struct nlattr *) nlmsg_data(nlh);
 936                 len = nlmsg_len(nlh);
 937                 switch (query->path_use) {
 938                 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
 939                         mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
 940                         break;
 941
 942                 case LS_RESOLVE_PATH_USE_ALL:
 943                 case LS_RESOLVE_PATH_USE_GMP:
 944                 default:
 945                         mask = IB_PATH_PRIMARY | IB_PATH_GMP |
 946                                 IB_PATH_BIDIRECTIONAL;
 947                         break;
 948                 }
 949                 nla_for_each_attr(curr, head, len, rem) {
 950                         if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
 951                                 rec = nla_data(curr);
 952                                 /*
 953                                  * Get the first one. In the future, we may
 954                                  * need to get up to 6 pathrecords.
 955                                  */
 956                                 if ((rec->flags & mask) == mask) {
 957                                         mad = query->mad_buf->mad;
 958                                         mad->mad_hdr.method |=
 959                                                 IB_MGMT_METHOD_RESP;
 960                                         memcpy(mad->data, rec->path_rec,
 961                                                sizeof(rec->path_rec));
 962                                         status = 0;
 963                                         break;
 964                                 }
 965                         }
 966                 }
 967                 query->callback(query, status, mad);
 968         }
 969
 970         mad_send_wc.send_buf = query->mad_buf;
 971         mad_send_wc.status = IB_WC_SUCCESS;
 972         send_handler(query->mad_buf->mad_agent, &mad_send_wc);
 973 }
 974
 975 static void ib_nl_request_timeout(struct work_struct *work)
 976 {
 977         unsigned long flags;
 978         struct ib_sa_query *query;
 979         unsigned long delay;
 980         struct ib_mad_send_wc mad_send_wc;
 981         int ret;
 982
 983         spin_lock_irqsave(&ib_nl_request_lock, flags);
 984         while (!list_empty(&ib_nl_request_list)) {
 985                 query = list_entry(ib_nl_request_list.next,
 986                                    struct ib_sa_query, list);
 987
 988                 if (time_after(query->timeout, jiffies)) {
 989                         delay = query->timeout - jiffies;
 990                         if ((long)delay <= 0)
 991                                 delay = 1;
 992                         queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
 993                         break;
 994                 }
 995
 996                 list_del(&query->list);
 997                 ib_sa_disable_local_svc(query);
 998                 /* Hold the lock to protect against query cancellation */
 999                 if (ib_sa_query_cancelled(query))
1000                         ret = -1;
1001                 else
1002                         ret = ib_post_send_mad(query->mad_buf, NULL);
1003                 if (ret) {
1004                         mad_send_wc.send_buf = query->mad_buf;
1005                         mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
1006                         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1007                         send_handler(query->port->agent, &mad_send_wc);
1008                         spin_lock_irqsave(&ib_nl_request_lock, flags);
1009                 }
1010         }
1011         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1012 }
1013
1014 int ib_nl_handle_set_timeout(struct sk_buff *skb,
1015                              struct nlmsghdr *nlh,
1016                              struct netlink_ext_ack *extack)
1017 {
1018         int timeout, delta, abs_delta;
1019         const struct nlattr *attr;
1020         unsigned long flags;
1021         struct ib_sa_query *query;
1022         long delay = 0;
1023         struct nlattr *tb[LS_NLA_TYPE_MAX];
1024         int ret;
1025
1026         if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
1027             !(NETLINK_CB(skb).sk))
1028                 return -EPERM;
1029
1030         ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1031                                    nlmsg_len(nlh), ib_nl_policy, NULL);
1032         attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
1033         if (ret || !attr)
1034                 goto settimeout_out;
1035
1036         timeout = *(int *) nla_data(attr);
1037         if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
1038                 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
1039         if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
1040                 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
1041
1042         delta = timeout - sa_local_svc_timeout_ms;
1043         if (delta < 0)
1044                 abs_delta = -delta;
1045         else
1046                 abs_delta = delta;
1047
1048         if (delta != 0) {
1049                 spin_lock_irqsave(&ib_nl_request_lock, flags);
1050                 sa_local_svc_timeout_ms = timeout;
1051                 list_for_each_entry(query, &ib_nl_request_list, list) {
1052                         if (delta < 0 && abs_delta > query->timeout)
1053                                 query->timeout = 0;
1054                         else
1055                                 query->timeout += delta;
1056
1057                         /* Get the new delay from the first entry */
1058                         if (!delay) {
1059                                 delay = query->timeout - jiffies;
1060                                 if (delay <= 0)
1061                                         delay = 1;
1062                         }
1063                 }
1064                 if (delay)
1065                         mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
1066                                          (unsigned long)delay);
1067                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1068         }
1069
1070 settimeout_out:
1071         return skb->len;
1072 }
1073
1074 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
1075 {
1076         struct nlattr *tb[LS_NLA_TYPE_MAX];
1077         int ret;
1078
1079         if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
1080                 return 0;
1081
1082         ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1083                                    nlmsg_len(nlh), ib_nl_policy, NULL);
1084         if (ret)
1085                 return 0;
1086
1087         return 1;
1088 }
1089
1090 int ib_nl_handle_resolve_resp(struct sk_buff *skb,
1091                               struct nlmsghdr *nlh,
1092                               struct netlink_ext_ack *extack)
1093 {
1094         unsigned long flags;
1095         struct ib_sa_query *query;
1096         struct ib_mad_send_buf *send_buf;
1097         struct ib_mad_send_wc mad_send_wc;
1098         int found = 0;
1099         int ret;
1100
1101         if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
1102             !(NETLINK_CB(skb).sk))
1103                 return -EPERM;
1104
1105         spin_lock_irqsave(&ib_nl_request_lock, flags);
1106         list_for_each_entry(query, &ib_nl_request_list, list) {
1107                 /*
1108                  * If the query is cancelled, let the timeout routine
1109                  * take care of it.
1110                  */
1111                 if (nlh->nlmsg_seq == query->seq) {
1112                         found = !ib_sa_query_cancelled(query);
1113                         if (found)
1114                                 list_del(&query->list);
1115                         break;
1116                 }
1117         }
1118
1119         if (!found) {
1120                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1121                 goto resp_out;
1122         }
1123
1124         send_buf = query->mad_buf;
1125
1126         if (!ib_nl_is_good_resolve_resp(nlh)) {
1127                 /* if the result is a failure, send out the packet via IB */
1128                 ib_sa_disable_local_svc(query);
1129                 ret = ib_post_send_mad(query->mad_buf, NULL);
1130                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1131                 if (ret) {
1132                         mad_send_wc.send_buf = send_buf;
1133                         mad_send_wc.status = IB_WC_GENERAL_ERR;
1134                         send_handler(query->port->agent, &mad_send_wc);
1135                 }
1136         } else {
1137                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1138                 ib_nl_process_good_resolve_rsp(query, nlh);
1139         }
1140
1141 resp_out:
1142         return skb->len;
1143 }
1144
1145 static void free_sm_ah(struct kref *kref)
1146 {
1147         struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
1148
1149         rdma_destroy_ah(sm_ah->ah, 0);
1150         kfree(sm_ah);
1151 }
1152
1153 void ib_sa_register_client(struct ib_sa_client *client)
1154 {
1155         atomic_set(&client->users, 1);
1156         init_completion(&client->comp);
1157 }
1158 EXPORT_SYMBOL(ib_sa_register_client);
1159
1160 void ib_sa_unregister_client(struct ib_sa_client *client)
1161 {
1162         ib_sa_client_put(client);
1163         wait_for_completion(&client->comp);
1164 }
1165 EXPORT_SYMBOL(ib_sa_unregister_client);
1166
1167 /**
1168  * ib_sa_cancel_query - try to cancel an SA query
1169  * @id:ID of query to cancel
1170  * @query:query pointer to cancel
1171  *
1172  * Try to cancel an SA query.  If the id and query don't match up or
1173  * the query has already completed, nothing is done.  Otherwise the
1174  * query is canceled and will complete with a status of -EINTR.
1175  */
1176 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1177 {
1178         unsigned long flags;
1179         struct ib_mad_agent *agent;
1180         struct ib_mad_send_buf *mad_buf;
1181
1182         xa_lock_irqsave(&queries, flags);
1183         if (xa_load(&queries, id) != query) {
1184                 xa_unlock_irqrestore(&queries, flags);
1185                 return;
1186         }
1187         agent = query->port->agent;
1188         mad_buf = query->mad_buf;
1189         xa_unlock_irqrestore(&queries, flags);
1190
1191         /*
1192          * If the query is still on the netlink request list, schedule
1193          * it to be cancelled by the timeout routine. Otherwise, it has been
1194          * sent to the MAD layer and has to be cancelled from there.
1195          */
1196         if (!ib_nl_cancel_request(query))
1197                 ib_cancel_mad(agent, mad_buf);
1198 }
1199 EXPORT_SYMBOL(ib_sa_cancel_query);
1200
1201 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
1202 {
1203         struct ib_sa_device *sa_dev;
1204         struct ib_sa_port   *port;
1205         unsigned long flags;
1206         u8 src_path_mask;
1207
1208         sa_dev = ib_get_client_data(device, &sa_client);
1209         if (!sa_dev)
1210                 return 0x7f;
1211
1212         port  = &sa_dev->port[port_num - sa_dev->start_port];
1213         spin_lock_irqsave(&port->ah_lock, flags);
1214         src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1215         spin_unlock_irqrestore(&port->ah_lock, flags);
1216
1217         return src_path_mask;
1218 }
1219
1220 static int init_ah_attr_grh_fields(struct ib_device *device, u8 port_num,
1221                                    struct sa_path_rec *rec,
1222                                    struct rdma_ah_attr *ah_attr,
1223                                    const struct ib_gid_attr *gid_attr)
1224 {
1225         enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
1226
1227         if (!gid_attr) {
1228                 gid_attr = rdma_find_gid_by_port(device, &rec->sgid, type,
1229                                                  port_num, NULL);
1230                 if (IS_ERR(gid_attr))
1231                         return PTR_ERR(gid_attr);
1232         } else
1233                 rdma_hold_gid_attr(gid_attr);
1234
1235         rdma_move_grh_sgid_attr(ah_attr, &rec->dgid,
1236                                 be32_to_cpu(rec->flow_label),
1237                                 rec->hop_limit, rec->traffic_class,
1238                                 gid_attr);
1239         return 0;
1240 }
1241
1242 /**
1243  * ib_init_ah_attr_from_path - Initialize address handle attributes based on
1244  *   an SA path record.
1245  * @device: Device associated ah attributes initialization.
1246  * @port_num: Port on the specified device.
1247  * @rec: path record entry to use for ah attributes initialization.
1248  * @ah_attr: address handle attributes to initialization from path record.
1249  * @gid_attr: SGID attribute to consider during initialization.
1250  *
1251  * When ib_init_ah_attr_from_path() returns success,
1252  * (a) for IB link layer it optionally contains a reference to SGID attribute
1253  * when GRH is present for IB link layer.
1254  * (b) for RoCE link layer it contains a reference to SGID attribute.
1255  * User must invoke rdma_destroy_ah_attr() to release reference to SGID
1256  * attributes which are initialized using ib_init_ah_attr_from_path().
1257  */
1258 int ib_init_ah_attr_from_path(struct ib_device *device, u8 port_num,
1259                               struct sa_path_rec *rec,
1260                               struct rdma_ah_attr *ah_attr,
1261                               const struct ib_gid_attr *gid_attr)
1262 {
1263         int ret = 0;
1264
1265         memset(ah_attr, 0, sizeof(*ah_attr));
1266         ah_attr->type = rdma_ah_find_type(device, port_num);
1267         rdma_ah_set_sl(ah_attr, rec->sl);
1268         rdma_ah_set_port_num(ah_attr, port_num);
1269         rdma_ah_set_static_rate(ah_attr, rec->rate);
1270
1271         if (sa_path_is_roce(rec)) {
1272                 ret = roce_resolve_route_from_path(rec, gid_attr);
1273                 if (ret)
1274                         return ret;
1275
1276                 memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN);
1277         } else {
1278                 rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
1279                 if (sa_path_is_opa(rec) &&
1280                     rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE))
1281                         rdma_ah_set_make_grd(ah_attr, true);
1282
1283                 rdma_ah_set_path_bits(ah_attr,
1284                                       be32_to_cpu(sa_path_get_slid(rec)) &
1285                                       get_src_path_mask(device, port_num));
1286         }
1287
1288         if (rec->hop_limit > 0 || sa_path_is_roce(rec))
1289                 ret = init_ah_attr_grh_fields(device, port_num,
1290                                               rec, ah_attr, gid_attr);
1291         return ret;
1292 }
1293 EXPORT_SYMBOL(ib_init_ah_attr_from_path);
1294
1295 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1296 {
1297         struct rdma_ah_attr ah_attr;
1298         unsigned long flags;
1299
1300         spin_lock_irqsave(&query->port->ah_lock, flags);
1301         if (!query->port->sm_ah) {
1302                 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1303                 return -EAGAIN;
1304         }
1305         kref_get(&query->port->sm_ah->ref);
1306         query->sm_ah = query->port->sm_ah;
1307         spin_unlock_irqrestore(&query->port->ah_lock, flags);
1308
1309         /*
1310          * Always check if sm_ah has valid dlid assigned,
1311          * before querying for class port info
1312          */
1313         if ((rdma_query_ah(query->sm_ah->ah, &ah_attr) < 0) ||
1314             !rdma_is_valid_unicast_lid(&ah_attr)) {
1315                 kref_put(&query->sm_ah->ref, free_sm_ah);
1316                 return -EAGAIN;
1317         }
1318         query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1319                                             query->sm_ah->pkey_index,
1320                                             0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1321                                             gfp_mask,
1322                                             ((query->flags & IB_SA_QUERY_OPA) ?
1323                                              OPA_MGMT_BASE_VERSION :
1324                                              IB_MGMT_BASE_VERSION));
1325         if (IS_ERR(query->mad_buf)) {
1326                 kref_put(&query->sm_ah->ref, free_sm_ah);
1327                 return -ENOMEM;
1328         }
1329
1330         query->mad_buf->ah = query->sm_ah->ah;
1331
1332         return 0;
1333 }
1334
1335 static void free_mad(struct ib_sa_query *query)
1336 {
1337         ib_free_send_mad(query->mad_buf);
1338         kref_put(&query->sm_ah->ref, free_sm_ah);
1339 }
1340
1341 static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent)
1342 {
1343         struct ib_sa_mad *mad = query->mad_buf->mad;
1344         unsigned long flags;
1345
1346         memset(mad, 0, sizeof *mad);
1347
1348         if (query->flags & IB_SA_QUERY_OPA) {
1349                 mad->mad_hdr.base_version  = OPA_MGMT_BASE_VERSION;
1350                 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION;
1351         } else {
1352                 mad->mad_hdr.base_version  = IB_MGMT_BASE_VERSION;
1353                 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1354         }
1355         mad->mad_hdr.mgmt_class    = IB_MGMT_CLASS_SUBN_ADM;
1356         spin_lock_irqsave(&tid_lock, flags);
1357         mad->mad_hdr.tid           =
1358                 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1359         spin_unlock_irqrestore(&tid_lock, flags);
1360 }
1361
1362 static int send_mad(struct ib_sa_query *query, unsigned long timeout_ms,
1363                     gfp_t gfp_mask)
1364 {
1365         unsigned long flags;
1366         int ret, id;
1367
1368         xa_lock_irqsave(&queries, flags);
1369         ret = __xa_alloc(&queries, &id, query, xa_limit_32b, gfp_mask);
1370         xa_unlock_irqrestore(&queries, flags);
1371         if (ret < 0)
1372                 return ret;
1373
1374         query->mad_buf->timeout_ms  = timeout_ms;
1375         query->mad_buf->context[0] = query;
1376         query->id = id;
1377
1378         if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) &&
1379             (!(query->flags & IB_SA_QUERY_OPA))) {
1380                 if (rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) {
1381                         if (!ib_nl_make_request(query, gfp_mask))
1382                                 return id;
1383                 }
1384                 ib_sa_disable_local_svc(query);
1385         }
1386
1387         ret = ib_post_send_mad(query->mad_buf, NULL);
1388         if (ret) {
1389                 xa_lock_irqsave(&queries, flags);
1390                 __xa_erase(&queries, id);
1391                 xa_unlock_irqrestore(&queries, flags);
1392         }
1393
1394         /*
1395          * It's not safe to dereference query any more, because the
1396          * send may already have completed and freed the query in
1397          * another context.
1398          */
1399         return ret ? ret : id;
1400 }
1401
1402 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
1403 {
1404         ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1405 }
1406 EXPORT_SYMBOL(ib_sa_unpack_path);
1407
1408 void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute)
1409 {
1410         ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1411 }
1412 EXPORT_SYMBOL(ib_sa_pack_path);
1413
1414 static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client,
1415                                          struct ib_device *device,
1416                                          u8 port_num)
1417 {
1418         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1419         struct ib_sa_port *port;
1420         unsigned long flags;
1421         bool ret = false;
1422
1423         if (!sa_dev)
1424                 return ret;
1425
1426         port = &sa_dev->port[port_num - sa_dev->start_port];
1427         spin_lock_irqsave(&port->classport_lock, flags);
1428         if (!port->classport_info.valid)
1429                 goto ret;
1430
1431         if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA)
1432                 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) &
1433                         OPA_CLASS_PORT_INFO_PR_SUPPORT;
1434 ret:
1435         spin_unlock_irqrestore(&port->classport_lock, flags);
1436         return ret;
1437 }
1438
1439 enum opa_pr_supported {
1440         PR_NOT_SUPPORTED,
1441         PR_OPA_SUPPORTED,
1442         PR_IB_SUPPORTED
1443 };
1444
1445 /**
1446  * Check if current PR query can be an OPA query.
1447  * Retuns PR_NOT_SUPPORTED if a path record query is not
1448  * possible, PR_OPA_SUPPORTED if an OPA path record query
1449  * is possible and PR_IB_SUPPORTED if an IB path record
1450  * query is possible.
1451  */
1452 static int opa_pr_query_possible(struct ib_sa_client *client,
1453                                  struct ib_device *device,
1454                                  u8 port_num,
1455                                  struct sa_path_rec *rec)
1456 {
1457         struct ib_port_attr port_attr;
1458
1459         if (ib_query_port(device, port_num, &port_attr))
1460                 return PR_NOT_SUPPORTED;
1461
1462         if (ib_sa_opa_pathrecord_support(client, device, port_num))
1463                 return PR_OPA_SUPPORTED;
1464
1465         if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1466                 return PR_NOT_SUPPORTED;
1467         else
1468                 return PR_IB_SUPPORTED;
1469 }
1470
1471 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1472                                     int status,
1473                                     struct ib_sa_mad *mad)
1474 {
1475         struct ib_sa_path_query *query =
1476                 container_of(sa_query, struct ib_sa_path_query, sa_query);
1477
1478         if (mad) {
1479                 struct sa_path_rec rec;
1480
1481                 if (sa_query->flags & IB_SA_QUERY_OPA) {
1482                         ib_unpack(opa_path_rec_table,
1483                                   ARRAY_SIZE(opa_path_rec_table),
1484                                   mad->data, &rec);
1485                         rec.rec_type = SA_PATH_REC_TYPE_OPA;
1486                         query->callback(status, &rec, query->context);
1487                 } else {
1488                         ib_unpack(path_rec_table,
1489                                   ARRAY_SIZE(path_rec_table),
1490                                   mad->data, &rec);
1491                         rec.rec_type = SA_PATH_REC_TYPE_IB;
1492                         sa_path_set_dmac_zero(&rec);
1493
1494                         if (query->conv_pr) {
1495                                 struct sa_path_rec opa;
1496
1497                                 memset(&opa, 0, sizeof(struct sa_path_rec));
1498                                 sa_convert_path_ib_to_opa(&opa, &rec);
1499                                 query->callback(status, &opa, query->context);
1500                         } else {
1501                                 query->callback(status, &rec, query->context);
1502                         }
1503                 }
1504         } else
1505                 query->callback(status, NULL, query->context);
1506 }
1507
1508 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1509 {
1510         struct ib_sa_path_query *query =
1511                 container_of(sa_query, struct ib_sa_path_query, sa_query);
1512
1513         kfree(query->conv_pr);
1514         kfree(query);
1515 }
1516
1517 /**
1518  * ib_sa_path_rec_get - Start a Path get query
1519  * @client:SA client
1520  * @device:device to send query on
1521  * @port_num: port number to send query on
1522  * @rec:Path Record to send in query
1523  * @comp_mask:component mask to send in query
1524  * @timeout_ms:time to wait for response
1525  * @gfp_mask:GFP mask to use for internal allocations
1526  * @callback:function called when query completes, times out or is
1527  * canceled
1528  * @context:opaque user context passed to callback
1529  * @sa_query:query context, used to cancel query
1530  *
1531  * Send a Path Record Get query to the SA to look up a path.  The
1532  * callback function will be called when the query completes (or
1533  * fails); status is 0 for a successful response, -EINTR if the query
1534  * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1535  * occurred sending the query.  The resp parameter of the callback is
1536  * only valid if status is 0.
1537  *
1538  * If the return value of ib_sa_path_rec_get() is negative, it is an
1539  * error code.  Otherwise it is a query ID that can be used to cancel
1540  * the query.
1541  */
1542 int ib_sa_path_rec_get(struct ib_sa_client *client,
1543                        struct ib_device *device, u8 port_num,
1544                        struct sa_path_rec *rec,
1545                        ib_sa_comp_mask comp_mask,
1546                        unsigned long timeout_ms, gfp_t gfp_mask,
1547                        void (*callback)(int status,
1548                                         struct sa_path_rec *resp,
1549                                         void *context),
1550                        void *context,
1551                        struct ib_sa_query **sa_query)
1552 {
1553         struct ib_sa_path_query *query;
1554         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1555         struct ib_sa_port   *port;
1556         struct ib_mad_agent *agent;
1557         struct ib_sa_mad *mad;
1558         enum opa_pr_supported status;
1559         int ret;
1560
1561         if (!sa_dev)
1562                 return -ENODEV;
1563
1564         if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1565             (rec->rec_type != SA_PATH_REC_TYPE_OPA))
1566                 return -EINVAL;
1567
1568         port  = &sa_dev->port[port_num - sa_dev->start_port];
1569         agent = port->agent;
1570
1571         query = kzalloc(sizeof(*query), gfp_mask);
1572         if (!query)
1573                 return -ENOMEM;
1574
1575         query->sa_query.port     = port;
1576         if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1577                 status = opa_pr_query_possible(client, device, port_num, rec);
1578                 if (status == PR_NOT_SUPPORTED) {
1579                         ret = -EINVAL;
1580                         goto err1;
1581                 } else if (status == PR_OPA_SUPPORTED) {
1582                         query->sa_query.flags |= IB_SA_QUERY_OPA;
1583                 } else {
1584                         query->conv_pr =
1585                                 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1586                         if (!query->conv_pr) {
1587                                 ret = -ENOMEM;
1588                                 goto err1;
1589                         }
1590                 }
1591         }
1592
1593         ret = alloc_mad(&query->sa_query, gfp_mask);
1594         if (ret)
1595                 goto err2;
1596
1597         ib_sa_client_get(client);
1598         query->sa_query.client = client;
1599         query->callback        = callback;
1600         query->context         = context;
1601
1602         mad = query->sa_query.mad_buf->mad;
1603         init_mad(&query->sa_query, agent);
1604
1605         query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1606         query->sa_query.release  = ib_sa_path_rec_release;
1607         mad->mad_hdr.method      = IB_MGMT_METHOD_GET;
1608         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1609         mad->sa_hdr.comp_mask    = comp_mask;
1610
1611         if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1612                 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1613                         rec, mad->data);
1614         } else if (query->conv_pr) {
1615                 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1616                 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1617                         query->conv_pr, mad->data);
1618         } else {
1619                 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1620                         rec, mad->data);
1621         }
1622
1623         *sa_query = &query->sa_query;
1624
1625         query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1626         query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1627                                                 query->conv_pr : rec;
1628
1629         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1630         if (ret < 0)
1631                 goto err3;
1632
1633         return ret;
1634
1635 err3:
1636         *sa_query = NULL;
1637         ib_sa_client_put(query->sa_query.client);
1638         free_mad(&query->sa_query);
1639 err2:
1640         kfree(query->conv_pr);
1641 err1:
1642         kfree(query);
1643         return ret;
1644 }
1645 EXPORT_SYMBOL(ib_sa_path_rec_get);
1646
1647 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1648                                     int status,
1649                                     struct ib_sa_mad *mad)
1650 {
1651         struct ib_sa_service_query *query =
1652                 container_of(sa_query, struct ib_sa_service_query, sa_query);
1653
1654         if (mad) {
1655                 struct ib_sa_service_rec rec;
1656
1657                 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1658                           mad->data, &rec);
1659                 query->callback(status, &rec, query->context);
1660         } else
1661                 query->callback(status, NULL, query->context);
1662 }
1663
1664 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1665 {
1666         kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1667 }
1668
1669 /**
1670  * ib_sa_service_rec_query - Start Service Record operation
1671  * @client:SA client
1672  * @device:device to send request on
1673  * @port_num: port number to send request on
1674  * @method:SA method - should be get, set, or delete
1675  * @rec:Service Record to send in request
1676  * @comp_mask:component mask to send in request
1677  * @timeout_ms:time to wait for response
1678  * @gfp_mask:GFP mask to use for internal allocations
1679  * @callback:function called when request completes, times out or is
1680  * canceled
1681  * @context:opaque user context passed to callback
1682  * @sa_query:request context, used to cancel request
1683  *
1684  * Send a Service Record set/get/delete to the SA to register,
1685  * unregister or query a service record.
1686  * The callback function will be called when the request completes (or
1687  * fails); status is 0 for a successful response, -EINTR if the query
1688  * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1689  * occurred sending the query.  The resp parameter of the callback is
1690  * only valid if status is 0.
1691  *
1692  * If the return value of ib_sa_service_rec_query() is negative, it is an
1693  * error code.  Otherwise it is a request ID that can be used to cancel
1694  * the query.
1695  */
1696 int ib_sa_service_rec_query(struct ib_sa_client *client,
1697                             struct ib_device *device, u8 port_num, u8 method,
1698                             struct ib_sa_service_rec *rec,
1699                             ib_sa_comp_mask comp_mask,
1700                             unsigned long timeout_ms, gfp_t gfp_mask,
1701                             void (*callback)(int status,
1702                                              struct ib_sa_service_rec *resp,
1703                                              void *context),
1704                             void *context,
1705                             struct ib_sa_query **sa_query)
1706 {
1707         struct ib_sa_service_query *query;
1708         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1709         struct ib_sa_port   *port;
1710         struct ib_mad_agent *agent;
1711         struct ib_sa_mad *mad;
1712         int ret;
1713
1714         if (!sa_dev)
1715                 return -ENODEV;
1716
1717         port  = &sa_dev->port[port_num - sa_dev->start_port];
1718         agent = port->agent;
1719
1720         if (method != IB_MGMT_METHOD_GET &&
1721             method != IB_MGMT_METHOD_SET &&
1722             method != IB_SA_METHOD_DELETE)
1723                 return -EINVAL;
1724
1725         query = kzalloc(sizeof(*query), gfp_mask);
1726         if (!query)
1727                 return -ENOMEM;
1728
1729         query->sa_query.port     = port;
1730         ret = alloc_mad(&query->sa_query, gfp_mask);
1731         if (ret)
1732                 goto err1;
1733
1734         ib_sa_client_get(client);
1735         query->sa_query.client = client;
1736         query->callback        = callback;
1737         query->context         = context;
1738
1739         mad = query->sa_query.mad_buf->mad;
1740         init_mad(&query->sa_query, agent);
1741
1742         query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1743         query->sa_query.release  = ib_sa_service_rec_release;
1744         mad->mad_hdr.method      = method;
1745         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1746         mad->sa_hdr.comp_mask    = comp_mask;
1747
1748         ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1749                 rec, mad->data);
1750
1751         *sa_query = &query->sa_query;
1752
1753         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1754         if (ret < 0)
1755                 goto err2;
1756
1757         return ret;
1758
1759 err2:
1760         *sa_query = NULL;
1761         ib_sa_client_put(query->sa_query.client);
1762         free_mad(&query->sa_query);
1763
1764 err1:
1765         kfree(query);
1766         return ret;
1767 }
1768 EXPORT_SYMBOL(ib_sa_service_rec_query);
1769
1770 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1771                                         int status,
1772                                         struct ib_sa_mad *mad)
1773 {
1774         struct ib_sa_mcmember_query *query =
1775                 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1776
1777         if (mad) {
1778                 struct ib_sa_mcmember_rec rec;
1779
1780                 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1781                           mad->data, &rec);
1782                 query->callback(status, &rec, query->context);
1783         } else
1784                 query->callback(status, NULL, query->context);
1785 }
1786
1787 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1788 {
1789         kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1790 }
1791
1792 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1793                              struct ib_device *device, u8 port_num,
1794                              u8 method,
1795                              struct ib_sa_mcmember_rec *rec,
1796                              ib_sa_comp_mask comp_mask,
1797                              unsigned long timeout_ms, gfp_t gfp_mask,
1798                              void (*callback)(int status,
1799                                               struct ib_sa_mcmember_rec *resp,
1800                                               void *context),
1801                              void *context,
1802                              struct ib_sa_query **sa_query)
1803 {
1804         struct ib_sa_mcmember_query *query;
1805         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1806         struct ib_sa_port   *port;
1807         struct ib_mad_agent *agent;
1808         struct ib_sa_mad *mad;
1809         int ret;
1810
1811         if (!sa_dev)
1812                 return -ENODEV;
1813
1814         port  = &sa_dev->port[port_num - sa_dev->start_port];
1815         agent = port->agent;
1816
1817         query = kzalloc(sizeof(*query), gfp_mask);
1818         if (!query)
1819                 return -ENOMEM;
1820
1821         query->sa_query.port     = port;
1822         ret = alloc_mad(&query->sa_query, gfp_mask);
1823         if (ret)
1824                 goto err1;
1825
1826         ib_sa_client_get(client);
1827         query->sa_query.client = client;
1828         query->callback        = callback;
1829         query->context         = context;
1830
1831         mad = query->sa_query.mad_buf->mad;
1832         init_mad(&query->sa_query, agent);
1833
1834         query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1835         query->sa_query.release  = ib_sa_mcmember_rec_release;
1836         mad->mad_hdr.method      = method;
1837         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1838         mad->sa_hdr.comp_mask    = comp_mask;
1839
1840         ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1841                 rec, mad->data);
1842
1843         *sa_query = &query->sa_query;
1844
1845         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1846         if (ret < 0)
1847                 goto err2;
1848
1849         return ret;
1850
1851 err2:
1852         *sa_query = NULL;
1853         ib_sa_client_put(query->sa_query.client);
1854         free_mad(&query->sa_query);
1855
1856 err1:
1857         kfree(query);
1858         return ret;
1859 }
1860
1861 /* Support GuidInfoRecord */
1862 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1863                                         int status,
1864                                         struct ib_sa_mad *mad)
1865 {
1866         struct ib_sa_guidinfo_query *query =
1867                 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1868
1869         if (mad) {
1870                 struct ib_sa_guidinfo_rec rec;
1871
1872                 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1873                           mad->data, &rec);
1874                 query->callback(status, &rec, query->context);
1875         } else
1876                 query->callback(status, NULL, query->context);
1877 }
1878
1879 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1880 {
1881         kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1882 }
1883
1884 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1885                               struct ib_device *device, u8 port_num,
1886                               struct ib_sa_guidinfo_rec *rec,
1887                               ib_sa_comp_mask comp_mask, u8 method,
1888                               unsigned long timeout_ms, gfp_t gfp_mask,
1889                               void (*callback)(int status,
1890                                                struct ib_sa_guidinfo_rec *resp,
1891                                                void *context),
1892                               void *context,
1893                               struct ib_sa_query **sa_query)
1894 {
1895         struct ib_sa_guidinfo_query *query;
1896         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1897         struct ib_sa_port *port;
1898         struct ib_mad_agent *agent;
1899         struct ib_sa_mad *mad;
1900         int ret;
1901
1902         if (!sa_dev)
1903                 return -ENODEV;
1904
1905         if (method != IB_MGMT_METHOD_GET &&
1906             method != IB_MGMT_METHOD_SET &&
1907             method != IB_SA_METHOD_DELETE) {
1908                 return -EINVAL;
1909         }
1910
1911         port  = &sa_dev->port[port_num - sa_dev->start_port];
1912         agent = port->agent;
1913
1914         query = kzalloc(sizeof(*query), gfp_mask);
1915         if (!query)
1916                 return -ENOMEM;
1917
1918         query->sa_query.port = port;
1919         ret = alloc_mad(&query->sa_query, gfp_mask);
1920         if (ret)
1921                 goto err1;
1922
1923         ib_sa_client_get(client);
1924         query->sa_query.client = client;
1925         query->callback        = callback;
1926         query->context         = context;
1927
1928         mad = query->sa_query.mad_buf->mad;
1929         init_mad(&query->sa_query, agent);
1930
1931         query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1932         query->sa_query.release  = ib_sa_guidinfo_rec_release;
1933
1934         mad->mad_hdr.method      = method;
1935         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1936         mad->sa_hdr.comp_mask    = comp_mask;
1937
1938         ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1939                 mad->data);
1940
1941         *sa_query = &query->sa_query;
1942
1943         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1944         if (ret < 0)
1945                 goto err2;
1946
1947         return ret;
1948
1949 err2:
1950         *sa_query = NULL;
1951         ib_sa_client_put(query->sa_query.client);
1952         free_mad(&query->sa_query);
1953
1954 err1:
1955         kfree(query);
1956         return ret;
1957 }
1958 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
1959
1960 bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
1961                                     struct ib_device *device,
1962                                     u8 port_num)
1963 {
1964         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1965         struct ib_sa_port *port;
1966         bool ret = false;
1967         unsigned long flags;
1968
1969         if (!sa_dev)
1970                 return ret;
1971
1972         port  = &sa_dev->port[port_num - sa_dev->start_port];
1973
1974         spin_lock_irqsave(&port->classport_lock, flags);
1975         if ((port->classport_info.valid) &&
1976             (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
1977                 ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
1978                         & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
1979         spin_unlock_irqrestore(&port->classport_lock, flags);
1980         return ret;
1981 }
1982 EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
1983
1984 struct ib_classport_info_context {
1985         struct completion       done;
1986         struct ib_sa_query      *sa_query;
1987 };
1988
1989 static void ib_classportinfo_cb(void *context)
1990 {
1991         struct ib_classport_info_context *cb_ctx = context;
1992
1993         complete(&cb_ctx->done);
1994 }
1995
1996 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
1997                                               int status,
1998                                               struct ib_sa_mad *mad)
1999 {
2000         unsigned long flags;
2001         struct ib_sa_classport_info_query *query =
2002                 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
2003         struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
2004
2005         if (mad) {
2006                 if (sa_query->flags & IB_SA_QUERY_OPA) {
2007                         struct opa_class_port_info rec;
2008
2009                         ib_unpack(opa_classport_info_rec_table,
2010                                   ARRAY_SIZE(opa_classport_info_rec_table),
2011                                   mad->data, &rec);
2012
2013                         spin_lock_irqsave(&sa_query->port->classport_lock,
2014                                           flags);
2015                         if (!status && !info->valid) {
2016                                 memcpy(&info->data.opa, &rec,
2017                                        sizeof(info->data.opa));
2018
2019                                 info->valid = true;
2020                                 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
2021                         }
2022                         spin_unlock_irqrestore(&sa_query->port->classport_lock,
2023                                                flags);
2024
2025                 } else {
2026                         struct ib_class_port_info rec;
2027
2028                         ib_unpack(ib_classport_info_rec_table,
2029                                   ARRAY_SIZE(ib_classport_info_rec_table),
2030                                   mad->data, &rec);
2031
2032                         spin_lock_irqsave(&sa_query->port->classport_lock,
2033                                           flags);
2034                         if (!status && !info->valid) {
2035                                 memcpy(&info->data.ib, &rec,
2036                                        sizeof(info->data.ib));
2037
2038                                 info->valid = true;
2039                                 info->data.type = RDMA_CLASS_PORT_INFO_IB;
2040                         }
2041                         spin_unlock_irqrestore(&sa_query->port->classport_lock,
2042                                                flags);
2043                 }
2044         }
2045         query->callback(query->context);
2046 }
2047
2048 static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
2049 {
2050         kfree(container_of(sa_query, struct ib_sa_classport_info_query,
2051                            sa_query));
2052 }
2053
2054 static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
2055                                           unsigned long timeout_ms,
2056                                           void (*callback)(void *context),
2057                                           void *context,
2058                                           struct ib_sa_query **sa_query)
2059 {
2060         struct ib_mad_agent *agent;
2061         struct ib_sa_classport_info_query *query;
2062         struct ib_sa_mad *mad;
2063         gfp_t gfp_mask = GFP_KERNEL;
2064         int ret;
2065
2066         agent = port->agent;
2067
2068         query = kzalloc(sizeof(*query), gfp_mask);
2069         if (!query)
2070                 return -ENOMEM;
2071
2072         query->sa_query.port = port;
2073         query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
2074                                                  port->port_num) ?
2075                                  IB_SA_QUERY_OPA : 0;
2076         ret = alloc_mad(&query->sa_query, gfp_mask);
2077         if (ret)
2078                 goto err_free;
2079
2080         query->callback = callback;
2081         query->context = context;
2082
2083         mad = query->sa_query.mad_buf->mad;
2084         init_mad(&query->sa_query, agent);
2085
2086         query->sa_query.callback = ib_sa_classport_info_rec_callback;
2087         query->sa_query.release  = ib_sa_classport_info_rec_release;
2088         mad->mad_hdr.method      = IB_MGMT_METHOD_GET;
2089         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
2090         mad->sa_hdr.comp_mask    = 0;
2091         *sa_query = &query->sa_query;
2092
2093         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2094         if (ret < 0)
2095                 goto err_free_mad;
2096
2097         return ret;
2098
2099 err_free_mad:
2100         *sa_query = NULL;
2101         free_mad(&query->sa_query);
2102
2103 err_free:
2104         kfree(query);
2105         return ret;
2106 }
2107
2108 static void update_ib_cpi(struct work_struct *work)
2109 {
2110         struct ib_sa_port *port =
2111                 container_of(work, struct ib_sa_port, ib_cpi_work.work);
2112         struct ib_classport_info_context *cb_context;
2113         unsigned long flags;
2114         int ret;
2115
2116         /* If the classport info is valid, nothing
2117          * to do here.
2118          */
2119         spin_lock_irqsave(&port->classport_lock, flags);
2120         if (port->classport_info.valid) {
2121                 spin_unlock_irqrestore(&port->classport_lock, flags);
2122                 return;
2123         }
2124         spin_unlock_irqrestore(&port->classport_lock, flags);
2125
2126         cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
2127         if (!cb_context)
2128                 goto err_nomem;
2129
2130         init_completion(&cb_context->done);
2131
2132         ret = ib_sa_classport_info_rec_query(port, 3000,
2133                                              ib_classportinfo_cb, cb_context,
2134                                              &cb_context->sa_query);
2135         if (ret < 0)
2136                 goto free_cb_err;
2137         wait_for_completion(&cb_context->done);
2138 free_cb_err:
2139         kfree(cb_context);
2140         spin_lock_irqsave(&port->classport_lock, flags);
2141
2142         /* If the classport info is still not valid, the query should have
2143          * failed for some reason. Retry issuing the query
2144          */
2145         if (!port->classport_info.valid) {
2146                 port->classport_info.retry_cnt++;
2147                 if (port->classport_info.retry_cnt <=
2148                     IB_SA_CPI_MAX_RETRY_CNT) {
2149                         unsigned long delay =
2150                                 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2151
2152                         queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
2153                 }
2154         }
2155         spin_unlock_irqrestore(&port->classport_lock, flags);
2156
2157 err_nomem:
2158         return;
2159 }
2160
2161 static void send_handler(struct ib_mad_agent *agent,
2162                          struct ib_mad_send_wc *mad_send_wc)
2163 {
2164         struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
2165         unsigned long flags;
2166
2167         if (query->callback)
2168                 switch (mad_send_wc->status) {
2169                 case IB_WC_SUCCESS:
2170                         /* No callback -- already got recv */
2171                         break;
2172                 case IB_WC_RESP_TIMEOUT_ERR:
2173                         query->callback(query, -ETIMEDOUT, NULL);
2174                         break;
2175                 case IB_WC_WR_FLUSH_ERR:
2176                         query->callback(query, -EINTR, NULL);
2177                         break;
2178                 default:
2179                         query->callback(query, -EIO, NULL);
2180                         break;
2181                 }
2182
2183         xa_lock_irqsave(&queries, flags);
2184         __xa_erase(&queries, query->id);
2185         xa_unlock_irqrestore(&queries, flags);
2186
2187         free_mad(query);
2188         if (query->client)
2189                 ib_sa_client_put(query->client);
2190         query->release(query);
2191 }
2192
2193 static void recv_handler(struct ib_mad_agent *mad_agent,
2194                          struct ib_mad_send_buf *send_buf,
2195                          struct ib_mad_recv_wc *mad_recv_wc)
2196 {
2197         struct ib_sa_query *query;
2198
2199         if (!send_buf)
2200                 return;
2201
2202         query = send_buf->context[0];
2203         if (query->callback) {
2204                 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2205                         query->callback(query,
2206                                         mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2207                                         -EINVAL : 0,
2208                                         (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2209                 else
2210                         query->callback(query, -EIO, NULL);
2211         }
2212
2213         ib_free_recv_mad(mad_recv_wc);
2214 }
2215
2216 static void update_sm_ah(struct work_struct *work)
2217 {
2218         struct ib_sa_port *port =
2219                 container_of(work, struct ib_sa_port, update_task);
2220         struct ib_sa_sm_ah *new_ah;
2221         struct ib_port_attr port_attr;
2222         struct rdma_ah_attr   ah_attr;
2223         bool grh_required;
2224
2225         if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2226                 pr_warn("Couldn't query port\n");
2227                 return;
2228         }
2229
2230         new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2231         if (!new_ah)
2232                 return;
2233
2234         kref_init(&new_ah->ref);
2235         new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2236
2237         new_ah->pkey_index = 0;
2238         if (ib_find_pkey(port->agent->device, port->port_num,
2239                          IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2240                 pr_err("Couldn't find index for default PKey\n");
2241
2242         memset(&ah_attr, 0, sizeof(ah_attr));
2243         ah_attr.type = rdma_ah_find_type(port->agent->device,
2244                                          port->port_num);
2245         rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2246         rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2247         rdma_ah_set_port_num(&ah_attr, port->port_num);
2248
2249         grh_required = rdma_is_grh_required(port->agent->device,
2250                                             port->port_num);
2251
2252         /*
2253          * The OPA sm_lid of 0xFFFF needs special handling so that it can be
2254          * differentiated from a permissive LID of 0xFFFF.  We set the
2255          * grh_required flag here so the SA can program the DGID in the
2256          * address handle appropriately
2257          */
2258         if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA &&
2259             (grh_required ||
2260              port_attr.sm_lid == be16_to_cpu(IB_LID_PERMISSIVE)))
2261                 rdma_ah_set_make_grd(&ah_attr, true);
2262
2263         if (ah_attr.type == RDMA_AH_ATTR_TYPE_IB && grh_required) {
2264                 rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2265                 rdma_ah_set_subnet_prefix(&ah_attr,
2266                                           cpu_to_be64(port_attr.subnet_prefix));
2267                 rdma_ah_set_interface_id(&ah_attr,
2268                                          cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2269         }
2270
2271         new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr,
2272                                     RDMA_CREATE_AH_SLEEPABLE);
2273         if (IS_ERR(new_ah->ah)) {
2274                 pr_warn("Couldn't create new SM AH\n");
2275                 kfree(new_ah);
2276                 return;
2277         }
2278
2279         spin_lock_irq(&port->ah_lock);
2280         if (port->sm_ah)
2281                 kref_put(&port->sm_ah->ref, free_sm_ah);
2282         port->sm_ah = new_ah;
2283         spin_unlock_irq(&port->ah_lock);
2284 }
2285
2286 static void ib_sa_event(struct ib_event_handler *handler,
2287                         struct ib_event *event)
2288 {
2289         if (event->event == IB_EVENT_PORT_ERR    ||
2290             event->event == IB_EVENT_PORT_ACTIVE ||
2291             event->event == IB_EVENT_LID_CHANGE  ||
2292             event->event == IB_EVENT_PKEY_CHANGE ||
2293             event->event == IB_EVENT_SM_CHANGE   ||
2294             event->event == IB_EVENT_CLIENT_REREGISTER) {
2295                 unsigned long flags;
2296                 struct ib_sa_device *sa_dev =
2297                         container_of(handler, typeof(*sa_dev), event_handler);
2298                 u8 port_num = event->element.port_num - sa_dev->start_port;
2299                 struct ib_sa_port *port = &sa_dev->port[port_num];
2300
2301                 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2302                         return;
2303
2304                 spin_lock_irqsave(&port->ah_lock, flags);
2305                 if (port->sm_ah)
2306                         kref_put(&port->sm_ah->ref, free_sm_ah);
2307                 port->sm_ah = NULL;
2308                 spin_unlock_irqrestore(&port->ah_lock, flags);
2309
2310                 if (event->event == IB_EVENT_SM_CHANGE ||
2311                     event->event == IB_EVENT_CLIENT_REREGISTER ||
2312                     event->event == IB_EVENT_LID_CHANGE ||
2313                     event->event == IB_EVENT_PORT_ACTIVE) {
2314                         unsigned long delay =
2315                                 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2316
2317                         spin_lock_irqsave(&port->classport_lock, flags);
2318                         port->classport_info.valid = false;
2319                         port->classport_info.retry_cnt = 0;
2320                         spin_unlock_irqrestore(&port->classport_lock, flags);
2321                         queue_delayed_work(ib_wq,
2322                                            &port->ib_cpi_work, delay);
2323                 }
2324                 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2325         }
2326 }
2327
2328 static void ib_sa_add_one(struct ib_device *device)
2329 {
2330         struct ib_sa_device *sa_dev;
2331         int s, e, i;
2332         int count = 0;
2333
2334         s = rdma_start_port(device);
2335         e = rdma_end_port(device);
2336
2337         sa_dev = kzalloc(struct_size(sa_dev, port, e - s + 1), GFP_KERNEL);
2338         if (!sa_dev)
2339                 return;
2340
2341         sa_dev->start_port = s;
2342         sa_dev->end_port   = e;
2343
2344         for (i = 0; i <= e - s; ++i) {
2345                 spin_lock_init(&sa_dev->port[i].ah_lock);
2346                 if (!rdma_cap_ib_sa(device, i + 1))
2347                         continue;
2348
2349                 sa_dev->port[i].sm_ah    = NULL;
2350                 sa_dev->port[i].port_num = i + s;
2351
2352                 spin_lock_init(&sa_dev->port[i].classport_lock);
2353                 sa_dev->port[i].classport_info.valid = false;
2354
2355                 sa_dev->port[i].agent =
2356                         ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2357                                               NULL, 0, send_handler,
2358                                               recv_handler, sa_dev, 0);
2359                 if (IS_ERR(sa_dev->port[i].agent))
2360                         goto err;
2361
2362                 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
2363                 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2364                                   update_ib_cpi);
2365
2366                 count++;
2367         }
2368
2369         if (!count)
2370                 goto free;
2371
2372         ib_set_client_data(device, &sa_client, sa_dev);
2373
2374         /*
2375          * We register our event handler after everything is set up,
2376          * and then update our cached info after the event handler is
2377          * registered to avoid any problems if a port changes state
2378          * during our initialization.
2379          */
2380
2381         INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
2382         ib_register_event_handler(&sa_dev->event_handler);
2383
2384         for (i = 0; i <= e - s; ++i) {
2385                 if (rdma_cap_ib_sa(device, i + 1))
2386                         update_sm_ah(&sa_dev->port[i].update_task);
2387         }
2388
2389         return;
2390
2391 err:
2392         while (--i >= 0) {
2393                 if (rdma_cap_ib_sa(device, i + 1))
2394                         ib_unregister_mad_agent(sa_dev->port[i].agent);
2395         }
2396 free:
2397         kfree(sa_dev);
2398         return;
2399 }
2400
2401 static void ib_sa_remove_one(struct ib_device *device, void *client_data)
2402 {
2403         struct ib_sa_device *sa_dev = client_data;
2404         int i;
2405
2406         if (!sa_dev)
2407                 return;
2408
2409         ib_unregister_event_handler(&sa_dev->event_handler);
2410         flush_workqueue(ib_wq);
2411
2412         for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
2413                 if (rdma_cap_ib_sa(device, i + 1)) {
2414                         cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
2415                         ib_unregister_mad_agent(sa_dev->port[i].agent);
2416                         if (sa_dev->port[i].sm_ah)
2417                                 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2418                 }
2419
2420         }
2421
2422         kfree(sa_dev);
2423 }
2424
2425 int ib_sa_init(void)
2426 {
2427         int ret;
2428
2429         get_random_bytes(&tid, sizeof tid);
2430
2431         atomic_set(&ib_nl_sa_request_seq, 0);
2432
2433         ret = ib_register_client(&sa_client);
2434         if (ret) {
2435                 pr_err("Couldn't register ib_sa client\n");
2436                 goto err1;
2437         }
2438
2439         ret = mcast_init();
2440         if (ret) {
2441                 pr_err("Couldn't initialize multicast handling\n");
2442                 goto err2;
2443         }
2444
2445         ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2446         if (!ib_nl_wq) {
2447                 ret = -ENOMEM;
2448                 goto err3;
2449         }
2450
2451         INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2452
2453         return 0;
2454
2455 err3:
2456         mcast_cleanup();
2457 err2:
2458         ib_unregister_client(&sa_client);
2459 err1:
2460         return ret;
2461 }
2462
2463 void ib_sa_cleanup(void)
2464 {
2465         cancel_delayed_work(&ib_nl_timed_work);
2466         flush_workqueue(ib_nl_wq);
2467         destroy_workqueue(ib_nl_wq);
2468         mcast_cleanup();
2469         ib_unregister_client(&sa_client);
2470         WARN_ON(!xa_empty(&queries));
2471 }