drivers/infiniband/core/sa_query.c

   1 /*
   2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Voltaire, Inc.  All rights reserved.
   4  * Copyright (c) 2006 Intel Corporation.  All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  */
  34
  35 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/err.h>
  38 #include <linux/random.h>
  39 #include <linux/spinlock.h>
  40 #include <linux/slab.h>
  41 #include <linux/dma-mapping.h>
  42 #include <linux/kref.h>
  43 #include <linux/idr.h>
  44 #include <linux/workqueue.h>
  45 #include <uapi/linux/if_ether.h>
  46 #include <rdma/ib_pack.h>
  47 #include <rdma/ib_cache.h>
  48 #include <rdma/rdma_netlink.h>
  49 #include <net/netlink.h>
  50 #include <uapi/rdma/ib_user_sa.h>
  51 #include <rdma/ib_marshall.h>
  52 #include <rdma/ib_addr.h>
  53 #include <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_SPINLOCK(idr_lock);
 187 static DEFINE_IDR(query_idr);
 188
 189 static DEFINE_SPINLOCK(tid_lock);
 190 static u32 tid;
 191
 192 #define PATH_REC_FIELD(field) \
 193         .struct_offset_bytes = offsetof(struct sa_path_rec, field),     \
 194         .struct_size_bytes   = sizeof((struct sa_path_rec *)0)->field,  \
 195         .field_name          = "sa_path_rec:" #field
 196
 197 static const struct ib_field path_rec_table[] = {
 198         { PATH_REC_FIELD(service_id),
 199           .offset_words = 0,
 200           .offset_bits  = 0,
 201           .size_bits    = 64 },
 202         { PATH_REC_FIELD(dgid),
 203           .offset_words = 2,
 204           .offset_bits  = 0,
 205           .size_bits    = 128 },
 206         { PATH_REC_FIELD(sgid),
 207           .offset_words = 6,
 208           .offset_bits  = 0,
 209           .size_bits    = 128 },
 210         { PATH_REC_FIELD(ib.dlid),
 211           .offset_words = 10,
 212           .offset_bits  = 0,
 213           .size_bits    = 16 },
 214         { PATH_REC_FIELD(ib.slid),
 215           .offset_words = 10,
 216           .offset_bits  = 16,
 217           .size_bits    = 16 },
 218         { PATH_REC_FIELD(ib.raw_traffic),
 219           .offset_words = 11,
 220           .offset_bits  = 0,
 221           .size_bits    = 1 },
 222         { RESERVED,
 223           .offset_words = 11,
 224           .offset_bits  = 1,
 225           .size_bits    = 3 },
 226         { PATH_REC_FIELD(flow_label),
 227           .offset_words = 11,
 228           .offset_bits  = 4,
 229           .size_bits    = 20 },
 230         { PATH_REC_FIELD(hop_limit),
 231           .offset_words = 11,
 232           .offset_bits  = 24,
 233           .size_bits    = 8 },
 234         { PATH_REC_FIELD(traffic_class),
 235           .offset_words = 12,
 236           .offset_bits  = 0,
 237           .size_bits    = 8 },
 238         { PATH_REC_FIELD(reversible),
 239           .offset_words = 12,
 240           .offset_bits  = 8,
 241           .size_bits    = 1 },
 242         { PATH_REC_FIELD(numb_path),
 243           .offset_words = 12,
 244           .offset_bits  = 9,
 245           .size_bits    = 7 },
 246         { PATH_REC_FIELD(pkey),
 247           .offset_words = 12,
 248           .offset_bits  = 16,
 249           .size_bits    = 16 },
 250         { PATH_REC_FIELD(qos_class),
 251           .offset_words = 13,
 252           .offset_bits  = 0,
 253           .size_bits    = 12 },
 254         { PATH_REC_FIELD(sl),
 255           .offset_words = 13,
 256           .offset_bits  = 12,
 257           .size_bits    = 4 },
 258         { PATH_REC_FIELD(mtu_selector),
 259           .offset_words = 13,
 260           .offset_bits  = 16,
 261           .size_bits    = 2 },
 262         { PATH_REC_FIELD(mtu),
 263           .offset_words = 13,
 264           .offset_bits  = 18,
 265           .size_bits    = 6 },
 266         { PATH_REC_FIELD(rate_selector),
 267           .offset_words = 13,
 268           .offset_bits  = 24,
 269           .size_bits    = 2 },
 270         { PATH_REC_FIELD(rate),
 271           .offset_words = 13,
 272           .offset_bits  = 26,
 273           .size_bits    = 6 },
 274         { PATH_REC_FIELD(packet_life_time_selector),
 275           .offset_words = 14,
 276           .offset_bits  = 0,
 277           .size_bits    = 2 },
 278         { PATH_REC_FIELD(packet_life_time),
 279           .offset_words = 14,
 280           .offset_bits  = 2,
 281           .size_bits    = 6 },
 282         { PATH_REC_FIELD(preference),
 283           .offset_words = 14,
 284           .offset_bits  = 8,
 285           .size_bits    = 8 },
 286         { RESERVED,
 287           .offset_words = 14,
 288           .offset_bits  = 16,
 289           .size_bits    = 48 },
 290 };
 291
 292 #define OPA_PATH_REC_FIELD(field) \
 293         .struct_offset_bytes = \
 294                 offsetof(struct sa_path_rec, field), \
 295         .struct_size_bytes   = \
 296                 sizeof((struct sa_path_rec *)0)->field, \
 297         .field_name          = "sa_path_rec:" #field
 298
 299 static const struct ib_field opa_path_rec_table[] = {
 300         { OPA_PATH_REC_FIELD(service_id),
 301           .offset_words = 0,
 302           .offset_bits  = 0,
 303           .size_bits    = 64 },
 304         { OPA_PATH_REC_FIELD(dgid),
 305           .offset_words = 2,
 306           .offset_bits  = 0,
 307           .size_bits    = 128 },
 308         { OPA_PATH_REC_FIELD(sgid),
 309           .offset_words = 6,
 310           .offset_bits  = 0,
 311           .size_bits    = 128 },
 312         { OPA_PATH_REC_FIELD(opa.dlid),
 313           .offset_words = 10,
 314           .offset_bits  = 0,
 315           .size_bits    = 32 },
 316         { OPA_PATH_REC_FIELD(opa.slid),
 317           .offset_words = 11,
 318           .offset_bits  = 0,
 319           .size_bits    = 32 },
 320         { OPA_PATH_REC_FIELD(opa.raw_traffic),
 321           .offset_words = 12,
 322           .offset_bits  = 0,
 323           .size_bits    = 1 },
 324         { RESERVED,
 325           .offset_words = 12,
 326           .offset_bits  = 1,
 327           .size_bits    = 3 },
 328         { OPA_PATH_REC_FIELD(flow_label),
 329           .offset_words = 12,
 330           .offset_bits  = 4,
 331           .size_bits    = 20 },
 332         { OPA_PATH_REC_FIELD(hop_limit),
 333           .offset_words = 12,
 334           .offset_bits  = 24,
 335           .size_bits    = 8 },
 336         { OPA_PATH_REC_FIELD(traffic_class),
 337           .offset_words = 13,
 338           .offset_bits  = 0,
 339           .size_bits    = 8 },
 340         { OPA_PATH_REC_FIELD(reversible),
 341           .offset_words = 13,
 342           .offset_bits  = 8,
 343           .size_bits    = 1 },
 344         { OPA_PATH_REC_FIELD(numb_path),
 345           .offset_words = 13,
 346           .offset_bits  = 9,
 347           .size_bits    = 7 },
 348         { OPA_PATH_REC_FIELD(pkey),
 349           .offset_words = 13,
 350           .offset_bits  = 16,
 351           .size_bits    = 16 },
 352         { OPA_PATH_REC_FIELD(opa.l2_8B),
 353           .offset_words = 14,
 354           .offset_bits  = 0,
 355           .size_bits    = 1 },
 356         { OPA_PATH_REC_FIELD(opa.l2_10B),
 357           .offset_words = 14,
 358           .offset_bits  = 1,
 359           .size_bits    = 1 },
 360         { OPA_PATH_REC_FIELD(opa.l2_9B),
 361           .offset_words = 14,
 362           .offset_bits  = 2,
 363           .size_bits    = 1 },
 364         { OPA_PATH_REC_FIELD(opa.l2_16B),
 365           .offset_words = 14,
 366           .offset_bits  = 3,
 367           .size_bits    = 1 },
 368         { RESERVED,
 369           .offset_words = 14,
 370           .offset_bits  = 4,
 371           .size_bits    = 2 },
 372         { OPA_PATH_REC_FIELD(opa.qos_type),
 373           .offset_words = 14,
 374           .offset_bits  = 6,
 375           .size_bits    = 2 },
 376         { OPA_PATH_REC_FIELD(opa.qos_priority),
 377           .offset_words = 14,
 378           .offset_bits  = 8,
 379           .size_bits    = 8 },
 380         { RESERVED,
 381           .offset_words = 14,
 382           .offset_bits  = 16,
 383           .size_bits    = 3 },
 384         { OPA_PATH_REC_FIELD(sl),
 385           .offset_words = 14,
 386           .offset_bits  = 19,
 387           .size_bits    = 5 },
 388         { RESERVED,
 389           .offset_words = 14,
 390           .offset_bits  = 24,
 391           .size_bits    = 8 },
 392         { OPA_PATH_REC_FIELD(mtu_selector),
 393           .offset_words = 15,
 394           .offset_bits  = 0,
 395           .size_bits    = 2 },
 396         { OPA_PATH_REC_FIELD(mtu),
 397           .offset_words = 15,
 398           .offset_bits  = 2,
 399           .size_bits    = 6 },
 400         { OPA_PATH_REC_FIELD(rate_selector),
 401           .offset_words = 15,
 402           .offset_bits  = 8,
 403           .size_bits    = 2 },
 404         { OPA_PATH_REC_FIELD(rate),
 405           .offset_words = 15,
 406           .offset_bits  = 10,
 407           .size_bits    = 6 },
 408         { OPA_PATH_REC_FIELD(packet_life_time_selector),
 409           .offset_words = 15,
 410           .offset_bits  = 16,
 411           .size_bits    = 2 },
 412         { OPA_PATH_REC_FIELD(packet_life_time),
 413           .offset_words = 15,
 414           .offset_bits  = 18,
 415           .size_bits    = 6 },
 416         { OPA_PATH_REC_FIELD(preference),
 417           .offset_words = 15,
 418           .offset_bits  = 24,
 419           .size_bits    = 8 },
 420 };
 421
 422 #define MCMEMBER_REC_FIELD(field) \
 423         .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field),      \
 424         .struct_size_bytes   = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
 425         .field_name          = "sa_mcmember_rec:" #field
 426
 427 static const struct ib_field mcmember_rec_table[] = {
 428         { MCMEMBER_REC_FIELD(mgid),
 429           .offset_words = 0,
 430           .offset_bits  = 0,
 431           .size_bits    = 128 },
 432         { MCMEMBER_REC_FIELD(port_gid),
 433           .offset_words = 4,
 434           .offset_bits  = 0,
 435           .size_bits    = 128 },
 436         { MCMEMBER_REC_FIELD(qkey),
 437           .offset_words = 8,
 438           .offset_bits  = 0,
 439           .size_bits    = 32 },
 440         { MCMEMBER_REC_FIELD(mlid),
 441           .offset_words = 9,
 442           .offset_bits  = 0,
 443           .size_bits    = 16 },
 444         { MCMEMBER_REC_FIELD(mtu_selector),
 445           .offset_words = 9,
 446           .offset_bits  = 16,
 447           .size_bits    = 2 },
 448         { MCMEMBER_REC_FIELD(mtu),
 449           .offset_words = 9,
 450           .offset_bits  = 18,
 451           .size_bits    = 6 },
 452         { MCMEMBER_REC_FIELD(traffic_class),
 453           .offset_words = 9,
 454           .offset_bits  = 24,
 455           .size_bits    = 8 },
 456         { MCMEMBER_REC_FIELD(pkey),
 457           .offset_words = 10,
 458           .offset_bits  = 0,
 459           .size_bits    = 16 },
 460         { MCMEMBER_REC_FIELD(rate_selector),
 461           .offset_words = 10,
 462           .offset_bits  = 16,
 463           .size_bits    = 2 },
 464         { MCMEMBER_REC_FIELD(rate),
 465           .offset_words = 10,
 466           .offset_bits  = 18,
 467           .size_bits    = 6 },
 468         { MCMEMBER_REC_FIELD(packet_life_time_selector),
 469           .offset_words = 10,
 470           .offset_bits  = 24,
 471           .size_bits    = 2 },
 472         { MCMEMBER_REC_FIELD(packet_life_time),
 473           .offset_words = 10,
 474           .offset_bits  = 26,
 475           .size_bits    = 6 },
 476         { MCMEMBER_REC_FIELD(sl),
 477           .offset_words = 11,
 478           .offset_bits  = 0,
 479           .size_bits    = 4 },
 480         { MCMEMBER_REC_FIELD(flow_label),
 481           .offset_words = 11,
 482           .offset_bits  = 4,
 483           .size_bits    = 20 },
 484         { MCMEMBER_REC_FIELD(hop_limit),
 485           .offset_words = 11,
 486           .offset_bits  = 24,
 487           .size_bits    = 8 },
 488         { MCMEMBER_REC_FIELD(scope),
 489           .offset_words = 12,
 490           .offset_bits  = 0,
 491           .size_bits    = 4 },
 492         { MCMEMBER_REC_FIELD(join_state),
 493           .offset_words = 12,
 494           .offset_bits  = 4,
 495           .size_bits    = 4 },
 496         { MCMEMBER_REC_FIELD(proxy_join),
 497           .offset_words = 12,
 498           .offset_bits  = 8,
 499           .size_bits    = 1 },
 500         { RESERVED,
 501           .offset_words = 12,
 502           .offset_bits  = 9,
 503           .size_bits    = 23 },
 504 };
 505
 506 #define SERVICE_REC_FIELD(field) \
 507         .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field),       \
 508         .struct_size_bytes   = sizeof ((struct ib_sa_service_rec *) 0)->field,  \
 509         .field_name          = "sa_service_rec:" #field
 510
 511 static const struct ib_field service_rec_table[] = {
 512         { SERVICE_REC_FIELD(id),
 513           .offset_words = 0,
 514           .offset_bits  = 0,
 515           .size_bits    = 64 },
 516         { SERVICE_REC_FIELD(gid),
 517           .offset_words = 2,
 518           .offset_bits  = 0,
 519           .size_bits    = 128 },
 520         { SERVICE_REC_FIELD(pkey),
 521           .offset_words = 6,
 522           .offset_bits  = 0,
 523           .size_bits    = 16 },
 524         { SERVICE_REC_FIELD(lease),
 525           .offset_words = 7,
 526           .offset_bits  = 0,
 527           .size_bits    = 32 },
 528         { SERVICE_REC_FIELD(key),
 529           .offset_words = 8,
 530           .offset_bits  = 0,
 531           .size_bits    = 128 },
 532         { SERVICE_REC_FIELD(name),
 533           .offset_words = 12,
 534           .offset_bits  = 0,
 535           .size_bits    = 64*8 },
 536         { SERVICE_REC_FIELD(data8),
 537           .offset_words = 28,
 538           .offset_bits  = 0,
 539           .size_bits    = 16*8 },
 540         { SERVICE_REC_FIELD(data16),
 541           .offset_words = 32,
 542           .offset_bits  = 0,
 543           .size_bits    = 8*16 },
 544         { SERVICE_REC_FIELD(data32),
 545           .offset_words = 36,
 546           .offset_bits  = 0,
 547           .size_bits    = 4*32 },
 548         { SERVICE_REC_FIELD(data64),
 549           .offset_words = 40,
 550           .offset_bits  = 0,
 551           .size_bits    = 2*64 },
 552 };
 553
 554 #define CLASSPORTINFO_REC_FIELD(field) \
 555         .struct_offset_bytes = offsetof(struct ib_class_port_info, field),      \
 556         .struct_size_bytes   = sizeof((struct ib_class_port_info *)0)->field,   \
 557         .field_name          = "ib_class_port_info:" #field
 558
 559 static const struct ib_field ib_classport_info_rec_table[] = {
 560         { CLASSPORTINFO_REC_FIELD(base_version),
 561           .offset_words = 0,
 562           .offset_bits  = 0,
 563           .size_bits    = 8 },
 564         { CLASSPORTINFO_REC_FIELD(class_version),
 565           .offset_words = 0,
 566           .offset_bits  = 8,
 567           .size_bits    = 8 },
 568         { CLASSPORTINFO_REC_FIELD(capability_mask),
 569           .offset_words = 0,
 570           .offset_bits  = 16,
 571           .size_bits    = 16 },
 572         { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
 573           .offset_words = 1,
 574           .offset_bits  = 0,
 575           .size_bits    = 32 },
 576         { CLASSPORTINFO_REC_FIELD(redirect_gid),
 577           .offset_words = 2,
 578           .offset_bits  = 0,
 579           .size_bits    = 128 },
 580         { CLASSPORTINFO_REC_FIELD(redirect_tcslfl),
 581           .offset_words = 6,
 582           .offset_bits  = 0,
 583           .size_bits    = 32 },
 584         { CLASSPORTINFO_REC_FIELD(redirect_lid),
 585           .offset_words = 7,
 586           .offset_bits  = 0,
 587           .size_bits    = 16 },
 588         { CLASSPORTINFO_REC_FIELD(redirect_pkey),
 589           .offset_words = 7,
 590           .offset_bits  = 16,
 591           .size_bits    = 16 },
 592
 593         { CLASSPORTINFO_REC_FIELD(redirect_qp),
 594           .offset_words = 8,
 595           .offset_bits  = 0,
 596           .size_bits    = 32 },
 597         { CLASSPORTINFO_REC_FIELD(redirect_qkey),
 598           .offset_words = 9,
 599           .offset_bits  = 0,
 600           .size_bits    = 32 },
 601
 602         { CLASSPORTINFO_REC_FIELD(trap_gid),
 603           .offset_words = 10,
 604           .offset_bits  = 0,
 605           .size_bits    = 128 },
 606         { CLASSPORTINFO_REC_FIELD(trap_tcslfl),
 607           .offset_words = 14,
 608           .offset_bits  = 0,
 609           .size_bits    = 32 },
 610
 611         { CLASSPORTINFO_REC_FIELD(trap_lid),
 612           .offset_words = 15,
 613           .offset_bits  = 0,
 614           .size_bits    = 16 },
 615         { CLASSPORTINFO_REC_FIELD(trap_pkey),
 616           .offset_words = 15,
 617           .offset_bits  = 16,
 618           .size_bits    = 16 },
 619
 620         { CLASSPORTINFO_REC_FIELD(trap_hlqp),
 621           .offset_words = 16,
 622           .offset_bits  = 0,
 623           .size_bits    = 32 },
 624         { CLASSPORTINFO_REC_FIELD(trap_qkey),
 625           .offset_words = 17,
 626           .offset_bits  = 0,
 627           .size_bits    = 32 },
 628 };
 629
 630 #define OPA_CLASSPORTINFO_REC_FIELD(field) \
 631         .struct_offset_bytes =\
 632                 offsetof(struct opa_class_port_info, field),    \
 633         .struct_size_bytes   = \
 634                 sizeof((struct opa_class_port_info *)0)->field, \
 635         .field_name          = "opa_class_port_info:" #field
 636
 637 static const struct ib_field opa_classport_info_rec_table[] = {
 638         { OPA_CLASSPORTINFO_REC_FIELD(base_version),
 639           .offset_words = 0,
 640           .offset_bits  = 0,
 641           .size_bits    = 8 },
 642         { OPA_CLASSPORTINFO_REC_FIELD(class_version),
 643           .offset_words = 0,
 644           .offset_bits  = 8,
 645           .size_bits    = 8 },
 646         { OPA_CLASSPORTINFO_REC_FIELD(cap_mask),
 647           .offset_words = 0,
 648           .offset_bits  = 16,
 649           .size_bits    = 16 },
 650         { OPA_CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
 651           .offset_words = 1,
 652           .offset_bits  = 0,
 653           .size_bits    = 32 },
 654         { OPA_CLASSPORTINFO_REC_FIELD(redirect_gid),
 655           .offset_words = 2,
 656           .offset_bits  = 0,
 657           .size_bits    = 128 },
 658         { OPA_CLASSPORTINFO_REC_FIELD(redirect_tc_fl),
 659           .offset_words = 6,
 660           .offset_bits  = 0,
 661           .size_bits    = 32 },
 662         { OPA_CLASSPORTINFO_REC_FIELD(redirect_lid),
 663           .offset_words = 7,
 664           .offset_bits  = 0,
 665           .size_bits    = 32 },
 666         { OPA_CLASSPORTINFO_REC_FIELD(redirect_sl_qp),
 667           .offset_words = 8,
 668           .offset_bits  = 0,
 669           .size_bits    = 32 },
 670         { OPA_CLASSPORTINFO_REC_FIELD(redirect_qkey),
 671           .offset_words = 9,
 672           .offset_bits  = 0,
 673           .size_bits    = 32 },
 674         { OPA_CLASSPORTINFO_REC_FIELD(trap_gid),
 675           .offset_words = 10,
 676           .offset_bits  = 0,
 677           .size_bits    = 128 },
 678         { OPA_CLASSPORTINFO_REC_FIELD(trap_tc_fl),
 679           .offset_words = 14,
 680           .offset_bits  = 0,
 681           .size_bits    = 32 },
 682         { OPA_CLASSPORTINFO_REC_FIELD(trap_lid),
 683           .offset_words = 15,
 684           .offset_bits  = 0,
 685           .size_bits    = 32 },
 686         { OPA_CLASSPORTINFO_REC_FIELD(trap_hl_qp),
 687           .offset_words = 16,
 688           .offset_bits  = 0,
 689           .size_bits    = 32 },
 690         { OPA_CLASSPORTINFO_REC_FIELD(trap_qkey),
 691           .offset_words = 17,
 692           .offset_bits  = 0,
 693           .size_bits    = 32 },
 694         { OPA_CLASSPORTINFO_REC_FIELD(trap_pkey),
 695           .offset_words = 18,
 696           .offset_bits  = 0,
 697           .size_bits    = 16 },
 698         { OPA_CLASSPORTINFO_REC_FIELD(redirect_pkey),
 699           .offset_words = 18,
 700           .offset_bits  = 16,
 701           .size_bits    = 16 },
 702         { OPA_CLASSPORTINFO_REC_FIELD(trap_sl_rsvd),
 703           .offset_words = 19,
 704           .offset_bits  = 0,
 705           .size_bits    = 8 },
 706         { RESERVED,
 707           .offset_words = 19,
 708           .offset_bits  = 8,
 709           .size_bits    = 24 },
 710 };
 711
 712 #define GUIDINFO_REC_FIELD(field) \
 713         .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field),      \
 714         .struct_size_bytes   = sizeof((struct ib_sa_guidinfo_rec *) 0)->field,  \
 715         .field_name          = "sa_guidinfo_rec:" #field
 716
 717 static const struct ib_field guidinfo_rec_table[] = {
 718         { GUIDINFO_REC_FIELD(lid),
 719           .offset_words = 0,
 720           .offset_bits  = 0,
 721           .size_bits    = 16 },
 722         { GUIDINFO_REC_FIELD(block_num),
 723           .offset_words = 0,
 724           .offset_bits  = 16,
 725           .size_bits    = 8 },
 726         { GUIDINFO_REC_FIELD(res1),
 727           .offset_words = 0,
 728           .offset_bits  = 24,
 729           .size_bits    = 8 },
 730         { GUIDINFO_REC_FIELD(res2),
 731           .offset_words = 1,
 732           .offset_bits  = 0,
 733           .size_bits    = 32 },
 734         { GUIDINFO_REC_FIELD(guid_info_list),
 735           .offset_words = 2,
 736           .offset_bits  = 0,
 737           .size_bits    = 512 },
 738 };
 739
 740 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
 741 {
 742         query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
 743 }
 744
 745 static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
 746 {
 747         return (query->flags & IB_SA_CANCEL);
 748 }
 749
 750 static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
 751                                      struct ib_sa_query *query)
 752 {
 753         struct sa_path_rec *sa_rec = query->mad_buf->context[1];
 754         struct ib_sa_mad *mad = query->mad_buf->mad;
 755         ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
 756         u16 val16;
 757         u64 val64;
 758         struct rdma_ls_resolve_header *header;
 759
 760         query->mad_buf->context[1] = NULL;
 761
 762         /* Construct the family header first */
 763         header = skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
 764         memcpy(header->device_name, query->port->agent->device->name,
 765                LS_DEVICE_NAME_MAX);
 766         header->port_num = query->port->port_num;
 767
 768         if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
 769             sa_rec->reversible != 0)
 770                 query->path_use = LS_RESOLVE_PATH_USE_GMP;
 771         else
 772                 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
 773         header->path_use = query->path_use;
 774
 775         /* Now build the attributes */
 776         if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
 777                 val64 = be64_to_cpu(sa_rec->service_id);
 778                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
 779                         sizeof(val64), &val64);
 780         }
 781         if (comp_mask & IB_SA_PATH_REC_DGID)
 782                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
 783                         sizeof(sa_rec->dgid), &sa_rec->dgid);
 784         if (comp_mask & IB_SA_PATH_REC_SGID)
 785                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
 786                         sizeof(sa_rec->sgid), &sa_rec->sgid);
 787         if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
 788                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
 789                         sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
 790
 791         if (comp_mask & IB_SA_PATH_REC_PKEY) {
 792                 val16 = be16_to_cpu(sa_rec->pkey);
 793                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
 794                         sizeof(val16), &val16);
 795         }
 796         if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
 797                 val16 = be16_to_cpu(sa_rec->qos_class);
 798                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
 799                         sizeof(val16), &val16);
 800         }
 801 }
 802
 803 static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
 804 {
 805         int len = 0;
 806
 807         if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
 808                 len += nla_total_size(sizeof(u64));
 809         if (comp_mask & IB_SA_PATH_REC_DGID)
 810                 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
 811         if (comp_mask & IB_SA_PATH_REC_SGID)
 812                 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
 813         if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
 814                 len += nla_total_size(sizeof(u8));
 815         if (comp_mask & IB_SA_PATH_REC_PKEY)
 816                 len += nla_total_size(sizeof(u16));
 817         if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
 818                 len += nla_total_size(sizeof(u16));
 819
 820         /*
 821          * Make sure that at least some of the required comp_mask bits are
 822          * set.
 823          */
 824         if (WARN_ON(len == 0))
 825                 return len;
 826
 827         /* Add the family header */
 828         len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
 829
 830         return len;
 831 }
 832
 833 static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
 834 {
 835         struct sk_buff *skb = NULL;
 836         struct nlmsghdr *nlh;
 837         void *data;
 838         int ret = 0;
 839         struct ib_sa_mad *mad;
 840         int len;
 841
 842         mad = query->mad_buf->mad;
 843         len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
 844         if (len <= 0)
 845                 return -EMSGSIZE;
 846
 847         skb = nlmsg_new(len, gfp_mask);
 848         if (!skb)
 849                 return -ENOMEM;
 850
 851         /* Put nlmsg header only for now */
 852         data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
 853                             RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
 854         if (!data) {
 855                 nlmsg_free(skb);
 856                 return -EMSGSIZE;
 857         }
 858
 859         /* Add attributes */
 860         ib_nl_set_path_rec_attrs(skb, query);
 861
 862         /* Repair the nlmsg header length */
 863         nlmsg_end(skb, nlh);
 864
 865         ret = rdma_nl_multicast(skb, RDMA_NL_GROUP_LS, gfp_mask);
 866         if (!ret)
 867                 ret = len;
 868         else
 869                 ret = 0;
 870
 871         return ret;
 872 }
 873
 874 static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
 875 {
 876         unsigned long flags;
 877         unsigned long delay;
 878         int ret;
 879
 880         INIT_LIST_HEAD(&query->list);
 881         query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
 882
 883         /* Put the request on the list first.*/
 884         spin_lock_irqsave(&ib_nl_request_lock, flags);
 885         delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
 886         query->timeout = delay + jiffies;
 887         list_add_tail(&query->list, &ib_nl_request_list);
 888         /* Start the timeout if this is the only request */
 889         if (ib_nl_request_list.next == &query->list)
 890                 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
 891         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 892
 893         ret = ib_nl_send_msg(query, gfp_mask);
 894         if (ret <= 0) {
 895                 ret = -EIO;
 896                 /* Remove the request */
 897                 spin_lock_irqsave(&ib_nl_request_lock, flags);
 898                 list_del(&query->list);
 899                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 900         } else {
 901                 ret = 0;
 902         }
 903
 904         return ret;
 905 }
 906
 907 static int ib_nl_cancel_request(struct ib_sa_query *query)
 908 {
 909         unsigned long flags;
 910         struct ib_sa_query *wait_query;
 911         int found = 0;
 912
 913         spin_lock_irqsave(&ib_nl_request_lock, flags);
 914         list_for_each_entry(wait_query, &ib_nl_request_list, list) {
 915                 /* Let the timeout to take care of the callback */
 916                 if (query == wait_query) {
 917                         query->flags |= IB_SA_CANCEL;
 918                         query->timeout = jiffies;
 919                         list_move(&query->list, &ib_nl_request_list);
 920                         found = 1;
 921                         mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
 922                         break;
 923                 }
 924         }
 925         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 926
 927         return found;
 928 }
 929
 930 static void send_handler(struct ib_mad_agent *agent,
 931                          struct ib_mad_send_wc *mad_send_wc);
 932
 933 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
 934                                            const struct nlmsghdr *nlh)
 935 {
 936         struct ib_mad_send_wc mad_send_wc;
 937         struct ib_sa_mad *mad = NULL;
 938         const struct nlattr *head, *curr;
 939         struct ib_path_rec_data  *rec;
 940         int len, rem;
 941         u32 mask = 0;
 942         int status = -EIO;
 943
 944         if (query->callback) {
 945                 head = (const struct nlattr *) nlmsg_data(nlh);
 946                 len = nlmsg_len(nlh);
 947                 switch (query->path_use) {
 948                 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
 949                         mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
 950                         break;
 951
 952                 case LS_RESOLVE_PATH_USE_ALL:
 953                 case LS_RESOLVE_PATH_USE_GMP:
 954                 default:
 955                         mask = IB_PATH_PRIMARY | IB_PATH_GMP |
 956                                 IB_PATH_BIDIRECTIONAL;
 957                         break;
 958                 }
 959                 nla_for_each_attr(curr, head, len, rem) {
 960                         if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
 961                                 rec = nla_data(curr);
 962                                 /*
 963                                  * Get the first one. In the future, we may
 964                                  * need to get up to 6 pathrecords.
 965                                  */
 966                                 if ((rec->flags & mask) == mask) {
 967                                         mad = query->mad_buf->mad;
 968                                         mad->mad_hdr.method |=
 969                                                 IB_MGMT_METHOD_RESP;
 970                                         memcpy(mad->data, rec->path_rec,
 971                                                sizeof(rec->path_rec));
 972                                         status = 0;
 973                                         break;
 974                                 }
 975                         }
 976                 }
 977                 query->callback(query, status, mad);
 978         }
 979
 980         mad_send_wc.send_buf = query->mad_buf;
 981         mad_send_wc.status = IB_WC_SUCCESS;
 982         send_handler(query->mad_buf->mad_agent, &mad_send_wc);
 983 }
 984
 985 static void ib_nl_request_timeout(struct work_struct *work)
 986 {
 987         unsigned long flags;
 988         struct ib_sa_query *query;
 989         unsigned long delay;
 990         struct ib_mad_send_wc mad_send_wc;
 991         int ret;
 992
 993         spin_lock_irqsave(&ib_nl_request_lock, flags);
 994         while (!list_empty(&ib_nl_request_list)) {
 995                 query = list_entry(ib_nl_request_list.next,
 996                                    struct ib_sa_query, list);
 997
 998                 if (time_after(query->timeout, jiffies)) {
 999                         delay = query->timeout - jiffies;
1000                         if ((long)delay <= 0)
1001                                 delay = 1;
1002                         queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
1003                         break;
1004                 }
1005
1006                 list_del(&query->list);
1007                 ib_sa_disable_local_svc(query);
1008                 /* Hold the lock to protect against query cancellation */
1009                 if (ib_sa_query_cancelled(query))
1010                         ret = -1;
1011                 else
1012                         ret = ib_post_send_mad(query->mad_buf, NULL);
1013                 if (ret) {
1014                         mad_send_wc.send_buf = query->mad_buf;
1015                         mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
1016                         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1017                         send_handler(query->port->agent, &mad_send_wc);
1018                         spin_lock_irqsave(&ib_nl_request_lock, flags);
1019                 }
1020         }
1021         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1022 }
1023
1024 int ib_nl_handle_set_timeout(struct sk_buff *skb,
1025                              struct nlmsghdr *nlh,
1026                              struct netlink_ext_ack *extack)
1027 {
1028         int timeout, delta, abs_delta;
1029         const struct nlattr *attr;
1030         unsigned long flags;
1031         struct ib_sa_query *query;
1032         long delay = 0;
1033         struct nlattr *tb[LS_NLA_TYPE_MAX];
1034         int ret;
1035
1036         if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
1037             !(NETLINK_CB(skb).sk))
1038                 return -EPERM;
1039
1040         ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1041                         nlmsg_len(nlh), ib_nl_policy, NULL);
1042         attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
1043         if (ret || !attr)
1044                 goto settimeout_out;
1045
1046         timeout = *(int *) nla_data(attr);
1047         if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
1048                 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
1049         if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
1050                 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
1051
1052         delta = timeout - sa_local_svc_timeout_ms;
1053         if (delta < 0)
1054                 abs_delta = -delta;
1055         else
1056                 abs_delta = delta;
1057
1058         if (delta != 0) {
1059                 spin_lock_irqsave(&ib_nl_request_lock, flags);
1060                 sa_local_svc_timeout_ms = timeout;
1061                 list_for_each_entry(query, &ib_nl_request_list, list) {
1062                         if (delta < 0 && abs_delta > query->timeout)
1063                                 query->timeout = 0;
1064                         else
1065                                 query->timeout += delta;
1066
1067                         /* Get the new delay from the first entry */
1068                         if (!delay) {
1069                                 delay = query->timeout - jiffies;
1070                                 if (delay <= 0)
1071                                         delay = 1;
1072                         }
1073                 }
1074                 if (delay)
1075                         mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
1076                                          (unsigned long)delay);
1077                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1078         }
1079
1080 settimeout_out:
1081         return 0;
1082 }
1083
1084 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
1085 {
1086         struct nlattr *tb[LS_NLA_TYPE_MAX];
1087         int ret;
1088
1089         if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
1090                 return 0;
1091
1092         ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1093                         nlmsg_len(nlh), ib_nl_policy, NULL);
1094         if (ret)
1095                 return 0;
1096
1097         return 1;
1098 }
1099
1100 int ib_nl_handle_resolve_resp(struct sk_buff *skb,
1101                               struct nlmsghdr *nlh,
1102                               struct netlink_ext_ack *extack)
1103 {
1104         unsigned long flags;
1105         struct ib_sa_query *query;
1106         struct ib_mad_send_buf *send_buf;
1107         struct ib_mad_send_wc mad_send_wc;
1108         int found = 0;
1109         int ret;
1110
1111         if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
1112             !(NETLINK_CB(skb).sk))
1113                 return -EPERM;
1114
1115         spin_lock_irqsave(&ib_nl_request_lock, flags);
1116         list_for_each_entry(query, &ib_nl_request_list, list) {
1117                 /*
1118                  * If the query is cancelled, let the timeout routine
1119                  * take care of it.
1120                  */
1121                 if (nlh->nlmsg_seq == query->seq) {
1122                         found = !ib_sa_query_cancelled(query);
1123                         if (found)
1124                                 list_del(&query->list);
1125                         break;
1126                 }
1127         }
1128
1129         if (!found) {
1130                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1131                 goto resp_out;
1132         }
1133
1134         send_buf = query->mad_buf;
1135
1136         if (!ib_nl_is_good_resolve_resp(nlh)) {
1137                 /* if the result is a failure, send out the packet via IB */
1138                 ib_sa_disable_local_svc(query);
1139                 ret = ib_post_send_mad(query->mad_buf, NULL);
1140                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1141                 if (ret) {
1142                         mad_send_wc.send_buf = send_buf;
1143                         mad_send_wc.status = IB_WC_GENERAL_ERR;
1144                         send_handler(query->port->agent, &mad_send_wc);
1145                 }
1146         } else {
1147                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1148                 ib_nl_process_good_resolve_rsp(query, nlh);
1149         }
1150
1151 resp_out:
1152         return 0;
1153 }
1154
1155 static void free_sm_ah(struct kref *kref)
1156 {
1157         struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
1158
1159         rdma_destroy_ah(sm_ah->ah);
1160         kfree(sm_ah);
1161 }
1162
1163 void ib_sa_register_client(struct ib_sa_client *client)
1164 {
1165         atomic_set(&client->users, 1);
1166         init_completion(&client->comp);
1167 }
1168 EXPORT_SYMBOL(ib_sa_register_client);
1169
1170 void ib_sa_unregister_client(struct ib_sa_client *client)
1171 {
1172         ib_sa_client_put(client);
1173         wait_for_completion(&client->comp);
1174 }
1175 EXPORT_SYMBOL(ib_sa_unregister_client);
1176
1177 /**
1178  * ib_sa_cancel_query - try to cancel an SA query
1179  * @id:ID of query to cancel
1180  * @query:query pointer to cancel
1181  *
1182  * Try to cancel an SA query.  If the id and query don't match up or
1183  * the query has already completed, nothing is done.  Otherwise the
1184  * query is canceled and will complete with a status of -EINTR.
1185  */
1186 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1187 {
1188         unsigned long flags;
1189         struct ib_mad_agent *agent;
1190         struct ib_mad_send_buf *mad_buf;
1191
1192         spin_lock_irqsave(&idr_lock, flags);
1193         if (idr_find(&query_idr, id) != query) {
1194                 spin_unlock_irqrestore(&idr_lock, flags);
1195                 return;
1196         }
1197         agent = query->port->agent;
1198         mad_buf = query->mad_buf;
1199         spin_unlock_irqrestore(&idr_lock, flags);
1200
1201         /*
1202          * If the query is still on the netlink request list, schedule
1203          * it to be cancelled by the timeout routine. Otherwise, it has been
1204          * sent to the MAD layer and has to be cancelled from there.
1205          */
1206         if (!ib_nl_cancel_request(query))
1207                 ib_cancel_mad(agent, mad_buf);
1208 }
1209 EXPORT_SYMBOL(ib_sa_cancel_query);
1210
1211 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
1212 {
1213         struct ib_sa_device *sa_dev;
1214         struct ib_sa_port   *port;
1215         unsigned long flags;
1216         u8 src_path_mask;
1217
1218         sa_dev = ib_get_client_data(device, &sa_client);
1219         if (!sa_dev)
1220                 return 0x7f;
1221
1222         port  = &sa_dev->port[port_num - sa_dev->start_port];
1223         spin_lock_irqsave(&port->ah_lock, flags);
1224         src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1225         spin_unlock_irqrestore(&port->ah_lock, flags);
1226
1227         return src_path_mask;
1228 }
1229
1230 int ib_init_ah_from_path(struct ib_device *device, u8 port_num,
1231                          struct sa_path_rec *rec,
1232                          struct rdma_ah_attr *ah_attr)
1233 {
1234         int ret;
1235         u16 gid_index;
1236         int use_roce;
1237         struct net_device *ndev = NULL;
1238
1239         memset(ah_attr, 0, sizeof *ah_attr);
1240         ah_attr->type = rdma_ah_find_type(device, port_num);
1241
1242         rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
1243
1244         if ((ah_attr->type == RDMA_AH_ATTR_TYPE_OPA) &&
1245             (rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE)))
1246                 rdma_ah_set_make_grd(ah_attr, true);
1247
1248         rdma_ah_set_sl(ah_attr, rec->sl);
1249         rdma_ah_set_path_bits(ah_attr, be32_to_cpu(sa_path_get_slid(rec)) &
1250                               get_src_path_mask(device, port_num));
1251         rdma_ah_set_port_num(ah_attr, port_num);
1252         rdma_ah_set_static_rate(ah_attr, rec->rate);
1253         use_roce = rdma_cap_eth_ah(device, port_num);
1254
1255         if (use_roce) {
1256                 struct net_device *idev;
1257                 struct net_device *resolved_dev;
1258                 struct rdma_dev_addr dev_addr = {
1259                         .bound_dev_if = ((sa_path_get_ifindex(rec) >= 0) ?
1260                                          sa_path_get_ifindex(rec) : 0),
1261                         .net = sa_path_get_ndev(rec) ?
1262                                 sa_path_get_ndev(rec) :
1263                                 &init_net
1264                 };
1265                 union {
1266                         struct sockaddr_in  _sockaddr_in;
1267                         struct sockaddr_in6 _sockaddr_in6;
1268                 } sgid_addr, dgid_addr;
1269
1270                 if (!device->get_netdev)
1271                         return -EOPNOTSUPP;
1272
1273                 rdma_gid2ip((struct sockaddr *)&sgid_addr, &rec->sgid);
1274                 rdma_gid2ip((struct sockaddr *)&dgid_addr, &rec->dgid);
1275
1276                 /* validate the route */
1277                 ret = rdma_resolve_ip_route((struct sockaddr *)&sgid_addr,
1278                                             (struct sockaddr *)&dgid_addr,
1279                                             &dev_addr);
1280                 if (ret)
1281                         return ret;
1282
1283                 if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
1284                      dev_addr.network == RDMA_NETWORK_IPV6) &&
1285                     rec->rec_type != SA_PATH_REC_TYPE_ROCE_V2)
1286                         return -EINVAL;
1287
1288                 idev = device->get_netdev(device, port_num);
1289                 if (!idev)
1290                         return -ENODEV;
1291
1292                 resolved_dev = dev_get_by_index(dev_addr.net,
1293                                                 dev_addr.bound_dev_if);
1294                 if (!resolved_dev) {
1295                         dev_put(idev);
1296                         return -ENODEV;
1297                 }
1298                 ndev = ib_get_ndev_from_path(rec);
1299                 rcu_read_lock();
1300                 if ((ndev && ndev != resolved_dev) ||
1301                     (resolved_dev != idev &&
1302                      !rdma_is_upper_dev_rcu(idev, resolved_dev)))
1303                         ret = -EHOSTUNREACH;
1304                 rcu_read_unlock();
1305                 dev_put(idev);
1306                 dev_put(resolved_dev);
1307                 if (ret) {
1308                         if (ndev)
1309                                 dev_put(ndev);
1310                         return ret;
1311                 }
1312         }
1313
1314         if (rec->hop_limit > 0 || use_roce) {
1315                 enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
1316
1317                 ret = ib_find_cached_gid_by_port(device, &rec->sgid, type,
1318                                                  port_num, ndev, &gid_index);
1319                 if (ret) {
1320                         if (ndev)
1321                                 dev_put(ndev);
1322                         return ret;
1323                 }
1324
1325                 rdma_ah_set_grh(ah_attr, &rec->dgid,
1326                                 be32_to_cpu(rec->flow_label),
1327                                 gid_index, rec->hop_limit,
1328                                 rec->traffic_class);
1329                 if (ndev)
1330                         dev_put(ndev);
1331         }
1332
1333         if (use_roce) {
1334                 u8 *dmac = sa_path_get_dmac(rec);
1335
1336                 if (!dmac)
1337                         return -EINVAL;
1338                 memcpy(ah_attr->roce.dmac, dmac, ETH_ALEN);
1339         }
1340
1341         return 0;
1342 }
1343 EXPORT_SYMBOL(ib_init_ah_from_path);
1344
1345 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1346 {
1347         unsigned long flags;
1348
1349         spin_lock_irqsave(&query->port->ah_lock, flags);
1350         if (!query->port->sm_ah) {
1351                 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1352                 return -EAGAIN;
1353         }
1354         kref_get(&query->port->sm_ah->ref);
1355         query->sm_ah = query->port->sm_ah;
1356         spin_unlock_irqrestore(&query->port->ah_lock, flags);
1357
1358         query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1359                                             query->sm_ah->pkey_index,
1360                                             0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1361                                             gfp_mask,
1362                                             ((query->flags & IB_SA_QUERY_OPA) ?
1363                                              OPA_MGMT_BASE_VERSION :
1364                                              IB_MGMT_BASE_VERSION));
1365         if (IS_ERR(query->mad_buf)) {
1366                 kref_put(&query->sm_ah->ref, free_sm_ah);
1367                 return -ENOMEM;
1368         }
1369
1370         query->mad_buf->ah = query->sm_ah->ah;
1371
1372         return 0;
1373 }
1374
1375 static void free_mad(struct ib_sa_query *query)
1376 {
1377         ib_free_send_mad(query->mad_buf);
1378         kref_put(&query->sm_ah->ref, free_sm_ah);
1379 }
1380
1381 static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent)
1382 {
1383         struct ib_sa_mad *mad = query->mad_buf->mad;
1384         unsigned long flags;
1385
1386         memset(mad, 0, sizeof *mad);
1387
1388         if (query->flags & IB_SA_QUERY_OPA) {
1389                 mad->mad_hdr.base_version  = OPA_MGMT_BASE_VERSION;
1390                 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION;
1391         } else {
1392                 mad->mad_hdr.base_version  = IB_MGMT_BASE_VERSION;
1393                 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1394         }
1395         mad->mad_hdr.mgmt_class    = IB_MGMT_CLASS_SUBN_ADM;
1396         spin_lock_irqsave(&tid_lock, flags);
1397         mad->mad_hdr.tid           =
1398                 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1399         spin_unlock_irqrestore(&tid_lock, flags);
1400 }
1401
1402 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1403 {
1404         bool preload = gfpflags_allow_blocking(gfp_mask);
1405         unsigned long flags;
1406         int ret, id;
1407
1408         if (preload)
1409                 idr_preload(gfp_mask);
1410         spin_lock_irqsave(&idr_lock, flags);
1411
1412         id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1413
1414         spin_unlock_irqrestore(&idr_lock, flags);
1415         if (preload)
1416                 idr_preload_end();
1417         if (id < 0)
1418                 return id;
1419
1420         query->mad_buf->timeout_ms  = timeout_ms;
1421         query->mad_buf->context[0] = query;
1422         query->id = id;
1423
1424         if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) &&
1425             (!(query->flags & IB_SA_QUERY_OPA))) {
1426                 if (!rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) {
1427                         if (!ib_nl_make_request(query, gfp_mask))
1428                                 return id;
1429                 }
1430                 ib_sa_disable_local_svc(query);
1431         }
1432
1433         ret = ib_post_send_mad(query->mad_buf, NULL);
1434         if (ret) {
1435                 spin_lock_irqsave(&idr_lock, flags);
1436                 idr_remove(&query_idr, id);
1437                 spin_unlock_irqrestore(&idr_lock, flags);
1438         }
1439
1440         /*
1441          * It's not safe to dereference query any more, because the
1442          * send may already have completed and freed the query in
1443          * another context.
1444          */
1445         return ret ? ret : id;
1446 }
1447
1448 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
1449 {
1450         ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1451 }
1452 EXPORT_SYMBOL(ib_sa_unpack_path);
1453
1454 void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute)
1455 {
1456         ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1457 }
1458 EXPORT_SYMBOL(ib_sa_pack_path);
1459
1460 static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client,
1461                                          struct ib_device *device,
1462                                          u8 port_num)
1463 {
1464         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1465         struct ib_sa_port *port;
1466         unsigned long flags;
1467         bool ret = false;
1468
1469         if (!sa_dev)
1470                 return ret;
1471
1472         port = &sa_dev->port[port_num - sa_dev->start_port];
1473         spin_lock_irqsave(&port->classport_lock, flags);
1474         if (!port->classport_info.valid)
1475                 goto ret;
1476
1477         if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA)
1478                 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) &
1479                         OPA_CLASS_PORT_INFO_PR_SUPPORT;
1480 ret:
1481         spin_unlock_irqrestore(&port->classport_lock, flags);
1482         return ret;
1483 }
1484
1485 enum opa_pr_supported {
1486         PR_NOT_SUPPORTED,
1487         PR_OPA_SUPPORTED,
1488         PR_IB_SUPPORTED
1489 };
1490
1491 /**
1492  * Check if current PR query can be an OPA query.
1493  * Retuns PR_NOT_SUPPORTED if a path record query is not
1494  * possible, PR_OPA_SUPPORTED if an OPA path record query
1495  * is possible and PR_IB_SUPPORTED if an IB path record
1496  * query is possible.
1497  */
1498 static int opa_pr_query_possible(struct ib_sa_client *client,
1499                                  struct ib_device *device,
1500                                  u8 port_num,
1501                                  struct sa_path_rec *rec)
1502 {
1503         struct ib_port_attr port_attr;
1504
1505         if (ib_query_port(device, port_num, &port_attr))
1506                 return PR_NOT_SUPPORTED;
1507
1508         if (ib_sa_opa_pathrecord_support(client, device, port_num))
1509                 return PR_OPA_SUPPORTED;
1510
1511         if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1512                 return PR_NOT_SUPPORTED;
1513         else
1514                 return PR_IB_SUPPORTED;
1515 }
1516
1517 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1518                                     int status,
1519                                     struct ib_sa_mad *mad)
1520 {
1521         struct ib_sa_path_query *query =
1522                 container_of(sa_query, struct ib_sa_path_query, sa_query);
1523
1524         if (mad) {
1525                 struct sa_path_rec rec;
1526
1527                 if (sa_query->flags & IB_SA_QUERY_OPA) {
1528                         ib_unpack(opa_path_rec_table,
1529                                   ARRAY_SIZE(opa_path_rec_table),
1530                                   mad->data, &rec);
1531                         rec.rec_type = SA_PATH_REC_TYPE_OPA;
1532                         query->callback(status, &rec, query->context);
1533                 } else {
1534                         ib_unpack(path_rec_table,
1535                                   ARRAY_SIZE(path_rec_table),
1536                                   mad->data, &rec);
1537                         rec.rec_type = SA_PATH_REC_TYPE_IB;
1538                         sa_path_set_ndev(&rec, NULL);
1539                         sa_path_set_ifindex(&rec, 0);
1540                         sa_path_set_dmac_zero(&rec);
1541
1542                         if (query->conv_pr) {
1543                                 struct sa_path_rec opa;
1544
1545                                 memset(&opa, 0, sizeof(struct sa_path_rec));
1546                                 sa_convert_path_ib_to_opa(&opa, &rec);
1547                                 query->callback(status, &opa, query->context);
1548                         } else {
1549                                 query->callback(status, &rec, query->context);
1550                         }
1551                 }
1552         } else
1553                 query->callback(status, NULL, query->context);
1554 }
1555
1556 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1557 {
1558         struct ib_sa_path_query *query =
1559                 container_of(sa_query, struct ib_sa_path_query, sa_query);
1560
1561         kfree(query->conv_pr);
1562         kfree(query);
1563 }
1564
1565 /**
1566  * ib_sa_path_rec_get - Start a Path get query
1567  * @client:SA client
1568  * @device:device to send query on
1569  * @port_num: port number to send query on
1570  * @rec:Path Record to send in query
1571  * @comp_mask:component mask to send in query
1572  * @timeout_ms:time to wait for response
1573  * @gfp_mask:GFP mask to use for internal allocations
1574  * @callback:function called when query completes, times out or is
1575  * canceled
1576  * @context:opaque user context passed to callback
1577  * @sa_query:query context, used to cancel query
1578  *
1579  * Send a Path Record Get query to the SA to look up a path.  The
1580  * callback function will be called when the query completes (or
1581  * fails); status is 0 for a successful response, -EINTR if the query
1582  * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1583  * occurred sending the query.  The resp parameter of the callback is
1584  * only valid if status is 0.
1585  *
1586  * If the return value of ib_sa_path_rec_get() is negative, it is an
1587  * error code.  Otherwise it is a query ID that can be used to cancel
1588  * the query.
1589  */
1590 int ib_sa_path_rec_get(struct ib_sa_client *client,
1591                        struct ib_device *device, u8 port_num,
1592                        struct sa_path_rec *rec,
1593                        ib_sa_comp_mask comp_mask,
1594                        int timeout_ms, gfp_t gfp_mask,
1595                        void (*callback)(int status,
1596                                         struct sa_path_rec *resp,
1597                                         void *context),
1598                        void *context,
1599                        struct ib_sa_query **sa_query)
1600 {
1601         struct ib_sa_path_query *query;
1602         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1603         struct ib_sa_port   *port;
1604         struct ib_mad_agent *agent;
1605         struct ib_sa_mad *mad;
1606         enum opa_pr_supported status;
1607         int ret;
1608
1609         if (!sa_dev)
1610                 return -ENODEV;
1611
1612         if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1613             (rec->rec_type != SA_PATH_REC_TYPE_OPA))
1614                 return -EINVAL;
1615
1616         port  = &sa_dev->port[port_num - sa_dev->start_port];
1617         agent = port->agent;
1618
1619         query = kzalloc(sizeof(*query), gfp_mask);
1620         if (!query)
1621                 return -ENOMEM;
1622
1623         query->sa_query.port     = port;
1624         if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1625                 status = opa_pr_query_possible(client, device, port_num, rec);
1626                 if (status == PR_NOT_SUPPORTED) {
1627                         ret = -EINVAL;
1628                         goto err1;
1629                 } else if (status == PR_OPA_SUPPORTED) {
1630                         query->sa_query.flags |= IB_SA_QUERY_OPA;
1631                 } else {
1632                         query->conv_pr =
1633                                 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1634                         if (!query->conv_pr) {
1635                                 ret = -ENOMEM;
1636                                 goto err1;
1637                         }
1638                 }
1639         }
1640
1641         ret = alloc_mad(&query->sa_query, gfp_mask);
1642         if (ret)
1643                 goto err2;
1644
1645         ib_sa_client_get(client);
1646         query->sa_query.client = client;
1647         query->callback        = callback;
1648         query->context         = context;
1649
1650         mad = query->sa_query.mad_buf->mad;
1651         init_mad(&query->sa_query, agent);
1652
1653         query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1654         query->sa_query.release  = ib_sa_path_rec_release;
1655         mad->mad_hdr.method      = IB_MGMT_METHOD_GET;
1656         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1657         mad->sa_hdr.comp_mask    = comp_mask;
1658
1659         if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1660                 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1661                         rec, mad->data);
1662         } else if (query->conv_pr) {
1663                 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1664                 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1665                         query->conv_pr, mad->data);
1666         } else {
1667                 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1668                         rec, mad->data);
1669         }
1670
1671         *sa_query = &query->sa_query;
1672
1673         query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1674         query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1675                                                 query->conv_pr : rec;
1676
1677         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1678         if (ret < 0)
1679                 goto err3;
1680
1681         return ret;
1682
1683 err3:
1684         *sa_query = NULL;
1685         ib_sa_client_put(query->sa_query.client);
1686         free_mad(&query->sa_query);
1687 err2:
1688         kfree(query->conv_pr);
1689 err1:
1690         kfree(query);
1691         return ret;
1692 }
1693 EXPORT_SYMBOL(ib_sa_path_rec_get);
1694
1695 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1696                                     int status,
1697                                     struct ib_sa_mad *mad)
1698 {
1699         struct ib_sa_service_query *query =
1700                 container_of(sa_query, struct ib_sa_service_query, sa_query);
1701
1702         if (mad) {
1703                 struct ib_sa_service_rec rec;
1704
1705                 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1706                           mad->data, &rec);
1707                 query->callback(status, &rec, query->context);
1708         } else
1709                 query->callback(status, NULL, query->context);
1710 }
1711
1712 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1713 {
1714         kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1715 }
1716
1717 /**
1718  * ib_sa_service_rec_query - Start Service Record operation
1719  * @client:SA client
1720  * @device:device to send request on
1721  * @port_num: port number to send request on
1722  * @method:SA method - should be get, set, or delete
1723  * @rec:Service Record to send in request
1724  * @comp_mask:component mask to send in request
1725  * @timeout_ms:time to wait for response
1726  * @gfp_mask:GFP mask to use for internal allocations
1727  * @callback:function called when request completes, times out or is
1728  * canceled
1729  * @context:opaque user context passed to callback
1730  * @sa_query:request context, used to cancel request
1731  *
1732  * Send a Service Record set/get/delete to the SA to register,
1733  * unregister or query a service record.
1734  * The callback function will be called when the request completes (or
1735  * fails); status is 0 for a successful response, -EINTR if the query
1736  * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1737  * occurred sending the query.  The resp parameter of the callback is
1738  * only valid if status is 0.
1739  *
1740  * If the return value of ib_sa_service_rec_query() is negative, it is an
1741  * error code.  Otherwise it is a request ID that can be used to cancel
1742  * the query.
1743  */
1744 int ib_sa_service_rec_query(struct ib_sa_client *client,
1745                             struct ib_device *device, u8 port_num, u8 method,
1746                             struct ib_sa_service_rec *rec,
1747                             ib_sa_comp_mask comp_mask,
1748                             int timeout_ms, gfp_t gfp_mask,
1749                             void (*callback)(int status,
1750                                              struct ib_sa_service_rec *resp,
1751                                              void *context),
1752                             void *context,
1753                             struct ib_sa_query **sa_query)
1754 {
1755         struct ib_sa_service_query *query;
1756         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1757         struct ib_sa_port   *port;
1758         struct ib_mad_agent *agent;
1759         struct ib_sa_mad *mad;
1760         int ret;
1761
1762         if (!sa_dev)
1763                 return -ENODEV;
1764
1765         port  = &sa_dev->port[port_num - sa_dev->start_port];
1766         agent = port->agent;
1767
1768         if (method != IB_MGMT_METHOD_GET &&
1769             method != IB_MGMT_METHOD_SET &&
1770             method != IB_SA_METHOD_DELETE)
1771                 return -EINVAL;
1772
1773         query = kzalloc(sizeof(*query), gfp_mask);
1774         if (!query)
1775                 return -ENOMEM;
1776
1777         query->sa_query.port     = port;
1778         ret = alloc_mad(&query->sa_query, gfp_mask);
1779         if (ret)
1780                 goto err1;
1781
1782         ib_sa_client_get(client);
1783         query->sa_query.client = client;
1784         query->callback        = callback;
1785         query->context         = context;
1786
1787         mad = query->sa_query.mad_buf->mad;
1788         init_mad(&query->sa_query, agent);
1789
1790         query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1791         query->sa_query.release  = ib_sa_service_rec_release;
1792         mad->mad_hdr.method      = method;
1793         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1794         mad->sa_hdr.comp_mask    = comp_mask;
1795
1796         ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1797                 rec, mad->data);
1798
1799         *sa_query = &query->sa_query;
1800
1801         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1802         if (ret < 0)
1803                 goto err2;
1804
1805         return ret;
1806
1807 err2:
1808         *sa_query = NULL;
1809         ib_sa_client_put(query->sa_query.client);
1810         free_mad(&query->sa_query);
1811
1812 err1:
1813         kfree(query);
1814         return ret;
1815 }
1816 EXPORT_SYMBOL(ib_sa_service_rec_query);
1817
1818 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1819                                         int status,
1820                                         struct ib_sa_mad *mad)
1821 {
1822         struct ib_sa_mcmember_query *query =
1823                 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1824
1825         if (mad) {
1826                 struct ib_sa_mcmember_rec rec;
1827
1828                 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1829                           mad->data, &rec);
1830                 query->callback(status, &rec, query->context);
1831         } else
1832                 query->callback(status, NULL, query->context);
1833 }
1834
1835 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1836 {
1837         kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1838 }
1839
1840 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1841                              struct ib_device *device, u8 port_num,
1842                              u8 method,
1843                              struct ib_sa_mcmember_rec *rec,
1844                              ib_sa_comp_mask comp_mask,
1845                              int timeout_ms, gfp_t gfp_mask,
1846                              void (*callback)(int status,
1847                                               struct ib_sa_mcmember_rec *resp,
1848                                               void *context),
1849                              void *context,
1850                              struct ib_sa_query **sa_query)
1851 {
1852         struct ib_sa_mcmember_query *query;
1853         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1854         struct ib_sa_port   *port;
1855         struct ib_mad_agent *agent;
1856         struct ib_sa_mad *mad;
1857         int ret;
1858
1859         if (!sa_dev)
1860                 return -ENODEV;
1861
1862         port  = &sa_dev->port[port_num - sa_dev->start_port];
1863         agent = port->agent;
1864
1865         query = kzalloc(sizeof(*query), gfp_mask);
1866         if (!query)
1867                 return -ENOMEM;
1868
1869         query->sa_query.port     = port;
1870         ret = alloc_mad(&query->sa_query, gfp_mask);
1871         if (ret)
1872                 goto err1;
1873
1874         ib_sa_client_get(client);
1875         query->sa_query.client = client;
1876         query->callback        = callback;
1877         query->context         = context;
1878
1879         mad = query->sa_query.mad_buf->mad;
1880         init_mad(&query->sa_query, agent);
1881
1882         query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1883         query->sa_query.release  = ib_sa_mcmember_rec_release;
1884         mad->mad_hdr.method      = method;
1885         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1886         mad->sa_hdr.comp_mask    = comp_mask;
1887
1888         ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1889                 rec, mad->data);
1890
1891         *sa_query = &query->sa_query;
1892
1893         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1894         if (ret < 0)
1895                 goto err2;
1896
1897         return ret;
1898
1899 err2:
1900         *sa_query = NULL;
1901         ib_sa_client_put(query->sa_query.client);
1902         free_mad(&query->sa_query);
1903
1904 err1:
1905         kfree(query);
1906         return ret;
1907 }
1908
1909 /* Support GuidInfoRecord */
1910 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1911                                         int status,
1912                                         struct ib_sa_mad *mad)
1913 {
1914         struct ib_sa_guidinfo_query *query =
1915                 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1916
1917         if (mad) {
1918                 struct ib_sa_guidinfo_rec rec;
1919
1920                 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1921                           mad->data, &rec);
1922                 query->callback(status, &rec, query->context);
1923         } else
1924                 query->callback(status, NULL, query->context);
1925 }
1926
1927 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1928 {
1929         kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1930 }
1931
1932 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1933                               struct ib_device *device, u8 port_num,
1934                               struct ib_sa_guidinfo_rec *rec,
1935                               ib_sa_comp_mask comp_mask, u8 method,
1936                               int timeout_ms, gfp_t gfp_mask,
1937                               void (*callback)(int status,
1938                                                struct ib_sa_guidinfo_rec *resp,
1939                                                void *context),
1940                               void *context,
1941                               struct ib_sa_query **sa_query)
1942 {
1943         struct ib_sa_guidinfo_query *query;
1944         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1945         struct ib_sa_port *port;
1946         struct ib_mad_agent *agent;
1947         struct ib_sa_mad *mad;
1948         int ret;
1949
1950         if (!sa_dev)
1951                 return -ENODEV;
1952
1953         if (method != IB_MGMT_METHOD_GET &&
1954             method != IB_MGMT_METHOD_SET &&
1955             method != IB_SA_METHOD_DELETE) {
1956                 return -EINVAL;
1957         }
1958
1959         port  = &sa_dev->port[port_num - sa_dev->start_port];
1960         agent = port->agent;
1961
1962         query = kzalloc(sizeof(*query), gfp_mask);
1963         if (!query)
1964                 return -ENOMEM;
1965
1966         query->sa_query.port = port;
1967         ret = alloc_mad(&query->sa_query, gfp_mask);
1968         if (ret)
1969                 goto err1;
1970
1971         ib_sa_client_get(client);
1972         query->sa_query.client = client;
1973         query->callback        = callback;
1974         query->context         = context;
1975
1976         mad = query->sa_query.mad_buf->mad;
1977         init_mad(&query->sa_query, agent);
1978
1979         query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1980         query->sa_query.release  = ib_sa_guidinfo_rec_release;
1981
1982         mad->mad_hdr.method      = method;
1983         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1984         mad->sa_hdr.comp_mask    = comp_mask;
1985
1986         ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1987                 mad->data);
1988
1989         *sa_query = &query->sa_query;
1990
1991         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1992         if (ret < 0)
1993                 goto err2;
1994
1995         return ret;
1996
1997 err2:
1998         *sa_query = NULL;
1999         ib_sa_client_put(query->sa_query.client);
2000         free_mad(&query->sa_query);
2001
2002 err1:
2003         kfree(query);
2004         return ret;
2005 }
2006 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
2007
2008 bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
2009                                     struct ib_device *device,
2010                                     u8 port_num)
2011 {
2012         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
2013         struct ib_sa_port *port;
2014         bool ret = false;
2015         unsigned long flags;
2016
2017         if (!sa_dev)
2018                 return ret;
2019
2020         port  = &sa_dev->port[port_num - sa_dev->start_port];
2021
2022         spin_lock_irqsave(&port->classport_lock, flags);
2023         if ((port->classport_info.valid) &&
2024             (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
2025                 ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
2026                         & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
2027         spin_unlock_irqrestore(&port->classport_lock, flags);
2028         return ret;
2029 }
2030 EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
2031
2032 struct ib_classport_info_context {
2033         struct completion       done;
2034         struct ib_sa_query      *sa_query;
2035 };
2036
2037 static void ib_classportinfo_cb(void *context)
2038 {
2039         struct ib_classport_info_context *cb_ctx = context;
2040
2041         complete(&cb_ctx->done);
2042 }
2043
2044 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
2045                                               int status,
2046                                               struct ib_sa_mad *mad)
2047 {
2048         unsigned long flags;
2049         struct ib_sa_classport_info_query *query =
2050                 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
2051         struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
2052
2053         if (mad) {
2054                 if (sa_query->flags & IB_SA_QUERY_OPA) {
2055                         struct opa_class_port_info rec;
2056
2057                         ib_unpack(opa_classport_info_rec_table,
2058                                   ARRAY_SIZE(opa_classport_info_rec_table),
2059                                   mad->data, &rec);
2060
2061                         spin_lock_irqsave(&sa_query->port->classport_lock,
2062                                           flags);
2063                         if (!status && !info->valid) {
2064                                 memcpy(&info->data.opa, &rec,
2065                                        sizeof(info->data.opa));
2066
2067                                 info->valid = true;
2068                                 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
2069                         }
2070                         spin_unlock_irqrestore(&sa_query->port->classport_lock,
2071                                                flags);
2072
2073                 } else {
2074                         struct ib_class_port_info rec;
2075
2076                         ib_unpack(ib_classport_info_rec_table,
2077                                   ARRAY_SIZE(ib_classport_info_rec_table),
2078                                   mad->data, &rec);
2079
2080                         spin_lock_irqsave(&sa_query->port->classport_lock,
2081                                           flags);
2082                         if (!status && !info->valid) {
2083                                 memcpy(&info->data.ib, &rec,
2084                                        sizeof(info->data.ib));
2085
2086                                 info->valid = true;
2087                                 info->data.type = RDMA_CLASS_PORT_INFO_IB;
2088                         }
2089                         spin_unlock_irqrestore(&sa_query->port->classport_lock,
2090                                                flags);
2091                 }
2092         }
2093         query->callback(query->context);
2094 }
2095
2096 static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
2097 {
2098         kfree(container_of(sa_query, struct ib_sa_classport_info_query,
2099                            sa_query));
2100 }
2101
2102 static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
2103                                           int timeout_ms,
2104                                           void (*callback)(void *context),
2105                                           void *context,
2106                                           struct ib_sa_query **sa_query)
2107 {
2108         struct ib_mad_agent *agent;
2109         struct ib_sa_classport_info_query *query;
2110         struct ib_sa_mad *mad;
2111         gfp_t gfp_mask = GFP_KERNEL;
2112         int ret;
2113
2114         agent = port->agent;
2115
2116         query = kzalloc(sizeof(*query), gfp_mask);
2117         if (!query)
2118                 return -ENOMEM;
2119
2120         query->sa_query.port = port;
2121         query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
2122                                                  port->port_num) ?
2123                                  IB_SA_QUERY_OPA : 0;
2124         ret = alloc_mad(&query->sa_query, gfp_mask);
2125         if (ret)
2126                 goto err_free;
2127
2128         query->callback = callback;
2129         query->context = context;
2130
2131         mad = query->sa_query.mad_buf->mad;
2132         init_mad(&query->sa_query, agent);
2133
2134         query->sa_query.callback = ib_sa_classport_info_rec_callback;
2135         query->sa_query.release  = ib_sa_classport_info_rec_release;
2136         mad->mad_hdr.method      = IB_MGMT_METHOD_GET;
2137         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
2138         mad->sa_hdr.comp_mask    = 0;
2139         *sa_query = &query->sa_query;
2140
2141         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2142         if (ret < 0)
2143                 goto err_free_mad;
2144
2145         return ret;
2146
2147 err_free_mad:
2148         *sa_query = NULL;
2149         free_mad(&query->sa_query);
2150
2151 err_free:
2152         kfree(query);
2153         return ret;
2154 }
2155
2156 static void update_ib_cpi(struct work_struct *work)
2157 {
2158         struct ib_sa_port *port =
2159                 container_of(work, struct ib_sa_port, ib_cpi_work.work);
2160         struct ib_classport_info_context *cb_context;
2161         unsigned long flags;
2162         int ret;
2163
2164         /* If the classport info is valid, nothing
2165          * to do here.
2166          */
2167         spin_lock_irqsave(&port->classport_lock, flags);
2168         if (port->classport_info.valid) {
2169                 spin_unlock_irqrestore(&port->classport_lock, flags);
2170                 return;
2171         }
2172         spin_unlock_irqrestore(&port->classport_lock, flags);
2173
2174         cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
2175         if (!cb_context)
2176                 goto err_nomem;
2177
2178         init_completion(&cb_context->done);
2179
2180         ret = ib_sa_classport_info_rec_query(port, 3000,
2181                                              ib_classportinfo_cb, cb_context,
2182                                              &cb_context->sa_query);
2183         if (ret < 0)
2184                 goto free_cb_err;
2185         wait_for_completion(&cb_context->done);
2186 free_cb_err:
2187         kfree(cb_context);
2188         spin_lock_irqsave(&port->classport_lock, flags);
2189
2190         /* If the classport info is still not valid, the query should have
2191          * failed for some reason. Retry issuing the query
2192          */
2193         if (!port->classport_info.valid) {
2194                 port->classport_info.retry_cnt++;
2195                 if (port->classport_info.retry_cnt <=
2196                     IB_SA_CPI_MAX_RETRY_CNT) {
2197                         unsigned long delay =
2198                                 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2199
2200                         queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
2201                 }
2202         }
2203         spin_unlock_irqrestore(&port->classport_lock, flags);
2204
2205 err_nomem:
2206         return;
2207 }
2208
2209 static void send_handler(struct ib_mad_agent *agent,
2210                          struct ib_mad_send_wc *mad_send_wc)
2211 {
2212         struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
2213         unsigned long flags;
2214
2215         if (query->callback)
2216                 switch (mad_send_wc->status) {
2217                 case IB_WC_SUCCESS:
2218                         /* No callback -- already got recv */
2219                         break;
2220                 case IB_WC_RESP_TIMEOUT_ERR:
2221                         query->callback(query, -ETIMEDOUT, NULL);
2222                         break;
2223                 case IB_WC_WR_FLUSH_ERR:
2224                         query->callback(query, -EINTR, NULL);
2225                         break;
2226                 default:
2227                         query->callback(query, -EIO, NULL);
2228                         break;
2229                 }
2230
2231         spin_lock_irqsave(&idr_lock, flags);
2232         idr_remove(&query_idr, query->id);
2233         spin_unlock_irqrestore(&idr_lock, flags);
2234
2235         free_mad(query);
2236         if (query->client)
2237                 ib_sa_client_put(query->client);
2238         query->release(query);
2239 }
2240
2241 static void recv_handler(struct ib_mad_agent *mad_agent,
2242                          struct ib_mad_send_buf *send_buf,
2243                          struct ib_mad_recv_wc *mad_recv_wc)
2244 {
2245         struct ib_sa_query *query;
2246
2247         if (!send_buf)
2248                 return;
2249
2250         query = send_buf->context[0];
2251         if (query->callback) {
2252                 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2253                         query->callback(query,
2254                                         mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2255                                         -EINVAL : 0,
2256                                         (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2257                 else
2258                         query->callback(query, -EIO, NULL);
2259         }
2260
2261         ib_free_recv_mad(mad_recv_wc);
2262 }
2263
2264 static void update_sm_ah(struct work_struct *work)
2265 {
2266         struct ib_sa_port *port =
2267                 container_of(work, struct ib_sa_port, update_task);
2268         struct ib_sa_sm_ah *new_ah;
2269         struct ib_port_attr port_attr;
2270         struct rdma_ah_attr   ah_attr;
2271
2272         if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2273                 pr_warn("Couldn't query port\n");
2274                 return;
2275         }
2276
2277         new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2278         if (!new_ah)
2279                 return;
2280
2281         kref_init(&new_ah->ref);
2282         new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2283
2284         new_ah->pkey_index = 0;
2285         if (ib_find_pkey(port->agent->device, port->port_num,
2286                          IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2287                 pr_err("Couldn't find index for default PKey\n");
2288
2289         memset(&ah_attr, 0, sizeof(ah_attr));
2290         ah_attr.type = rdma_ah_find_type(port->agent->device,
2291                                          port->port_num);
2292         rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2293         rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2294         rdma_ah_set_port_num(&ah_attr, port->port_num);
2295         if (port_attr.grh_required) {
2296                 if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA) {
2297                         rdma_ah_set_make_grd(&ah_attr, true);
2298                 } else {
2299                         rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2300                         rdma_ah_set_subnet_prefix(&ah_attr,
2301                                                   cpu_to_be64(port_attr.subnet_prefix));
2302                         rdma_ah_set_interface_id(&ah_attr,
2303                                                  cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2304                 }
2305         }
2306
2307         new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr);
2308         if (IS_ERR(new_ah->ah)) {
2309                 pr_warn("Couldn't create new SM AH\n");
2310                 kfree(new_ah);
2311                 return;
2312         }
2313
2314         spin_lock_irq(&port->ah_lock);
2315         if (port->sm_ah)
2316                 kref_put(&port->sm_ah->ref, free_sm_ah);
2317         port->sm_ah = new_ah;
2318         spin_unlock_irq(&port->ah_lock);
2319 }
2320
2321 static void ib_sa_event(struct ib_event_handler *handler,
2322                         struct ib_event *event)
2323 {
2324         if (event->event == IB_EVENT_PORT_ERR    ||
2325             event->event == IB_EVENT_PORT_ACTIVE ||
2326             event->event == IB_EVENT_LID_CHANGE  ||
2327             event->event == IB_EVENT_PKEY_CHANGE ||
2328             event->event == IB_EVENT_SM_CHANGE   ||
2329             event->event == IB_EVENT_CLIENT_REREGISTER) {
2330                 unsigned long flags;
2331                 struct ib_sa_device *sa_dev =
2332                         container_of(handler, typeof(*sa_dev), event_handler);
2333                 u8 port_num = event->element.port_num - sa_dev->start_port;
2334                 struct ib_sa_port *port = &sa_dev->port[port_num];
2335
2336                 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2337                         return;
2338
2339                 spin_lock_irqsave(&port->ah_lock, flags);
2340                 if (port->sm_ah)
2341                         kref_put(&port->sm_ah->ref, free_sm_ah);
2342                 port->sm_ah = NULL;
2343                 spin_unlock_irqrestore(&port->ah_lock, flags);
2344
2345                 if (event->event == IB_EVENT_SM_CHANGE ||
2346                     event->event == IB_EVENT_CLIENT_REREGISTER ||
2347                     event->event == IB_EVENT_LID_CHANGE ||
2348                     event->event == IB_EVENT_PORT_ACTIVE) {
2349                         unsigned long delay =
2350                                 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2351
2352                         spin_lock_irqsave(&port->classport_lock, flags);
2353                         port->classport_info.valid = false;
2354                         port->classport_info.retry_cnt = 0;
2355                         spin_unlock_irqrestore(&port->classport_lock, flags);
2356                         queue_delayed_work(ib_wq,
2357                                            &port->ib_cpi_work, delay);
2358                 }
2359                 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2360         }
2361 }
2362
2363 static void ib_sa_add_one(struct ib_device *device)
2364 {
2365         struct ib_sa_device *sa_dev;
2366         int s, e, i;
2367         int count = 0;
2368
2369         s = rdma_start_port(device);
2370         e = rdma_end_port(device);
2371
2372         sa_dev = kzalloc(sizeof *sa_dev +
2373                          (e - s + 1) * sizeof (struct ib_sa_port),
2374                          GFP_KERNEL);
2375         if (!sa_dev)
2376                 return;
2377
2378         sa_dev->start_port = s;
2379         sa_dev->end_port   = e;
2380
2381         for (i = 0; i <= e - s; ++i) {
2382                 spin_lock_init(&sa_dev->port[i].ah_lock);
2383                 if (!rdma_cap_ib_sa(device, i + 1))
2384                         continue;
2385
2386                 sa_dev->port[i].sm_ah    = NULL;
2387                 sa_dev->port[i].port_num = i + s;
2388
2389                 spin_lock_init(&sa_dev->port[i].classport_lock);
2390                 sa_dev->port[i].classport_info.valid = false;
2391
2392                 sa_dev->port[i].agent =
2393                         ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2394                                               NULL, 0, send_handler,
2395                                               recv_handler, sa_dev, 0);
2396                 if (IS_ERR(sa_dev->port[i].agent))
2397                         goto err;
2398
2399                 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
2400                 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2401                                   update_ib_cpi);
2402
2403                 count++;
2404         }
2405
2406         if (!count)
2407                 goto free;
2408
2409         ib_set_client_data(device, &sa_client, sa_dev);
2410
2411         /*
2412          * We register our event handler after everything is set up,
2413          * and then update our cached info after the event handler is
2414          * registered to avoid any problems if a port changes state
2415          * during our initialization.
2416          */
2417
2418         INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
2419         ib_register_event_handler(&sa_dev->event_handler);
2420
2421         for (i = 0; i <= e - s; ++i) {
2422                 if (rdma_cap_ib_sa(device, i + 1))
2423                         update_sm_ah(&sa_dev->port[i].update_task);
2424         }
2425
2426         return;
2427
2428 err:
2429         while (--i >= 0) {
2430                 if (rdma_cap_ib_sa(device, i + 1))
2431                         ib_unregister_mad_agent(sa_dev->port[i].agent);
2432         }
2433 free:
2434         kfree(sa_dev);
2435         return;
2436 }
2437
2438 static void ib_sa_remove_one(struct ib_device *device, void *client_data)
2439 {
2440         struct ib_sa_device *sa_dev = client_data;
2441         int i;
2442
2443         if (!sa_dev)
2444                 return;
2445
2446         ib_unregister_event_handler(&sa_dev->event_handler);
2447         flush_workqueue(ib_wq);
2448
2449         for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
2450                 if (rdma_cap_ib_sa(device, i + 1)) {
2451                         cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
2452                         ib_unregister_mad_agent(sa_dev->port[i].agent);
2453                         if (sa_dev->port[i].sm_ah)
2454                                 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2455                 }
2456
2457         }
2458
2459         kfree(sa_dev);
2460 }
2461
2462 int ib_sa_init(void)
2463 {
2464         int ret;
2465
2466         get_random_bytes(&tid, sizeof tid);
2467
2468         atomic_set(&ib_nl_sa_request_seq, 0);
2469
2470         ret = ib_register_client(&sa_client);
2471         if (ret) {
2472                 pr_err("Couldn't register ib_sa client\n");
2473                 goto err1;
2474         }
2475
2476         ret = mcast_init();
2477         if (ret) {
2478                 pr_err("Couldn't initialize multicast handling\n");
2479                 goto err2;
2480         }
2481
2482         ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2483         if (!ib_nl_wq) {
2484                 ret = -ENOMEM;
2485                 goto err3;
2486         }
2487
2488         INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2489
2490         return 0;
2491
2492 err3:
2493         mcast_cleanup();
2494 err2:
2495         ib_unregister_client(&sa_client);
2496 err1:
2497         return ret;
2498 }
2499
2500 void ib_sa_cleanup(void)
2501 {
2502         cancel_delayed_work(&ib_nl_timed_work);
2503         flush_workqueue(ib_nl_wq);
2504         destroy_workqueue(ib_nl_wq);
2505         mcast_cleanup();
2506         ib_unregister_client(&sa_client);
2507         idr_destroy(&query_idr);
2508 }