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 skb->len;
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 skb->len;
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 static int
1231 roce_resolve_route_from_path(struct ib_device *device, u8 port_num,
1232                              struct sa_path_rec *rec)
1233 {
1234         struct net_device *resolved_dev;
1235         struct net_device *ndev;
1236         struct net_device *idev;
1237         struct rdma_dev_addr dev_addr = {
1238                 .bound_dev_if = ((sa_path_get_ifindex(rec) >= 0) ?
1239                                  sa_path_get_ifindex(rec) : 0),
1240                 .net = sa_path_get_ndev(rec) ?
1241                         sa_path_get_ndev(rec) :
1242                         &init_net
1243         };
1244         union {
1245                 struct sockaddr     _sockaddr;
1246                 struct sockaddr_in  _sockaddr_in;
1247                 struct sockaddr_in6 _sockaddr_in6;
1248         } sgid_addr, dgid_addr;
1249         int ret;
1250
1251         if (rec->roce.route_resolved)
1252                 return 0;
1253
1254         if (!device->get_netdev)
1255                 return -EOPNOTSUPP;
1256
1257         rdma_gid2ip(&sgid_addr._sockaddr, &rec->sgid);
1258         rdma_gid2ip(&dgid_addr._sockaddr, &rec->dgid);
1259
1260         /* validate the route */
1261         ret = rdma_resolve_ip_route(&sgid_addr._sockaddr,
1262                                     &dgid_addr._sockaddr, &dev_addr);
1263         if (ret)
1264                 return ret;
1265
1266         if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
1267              dev_addr.network == RDMA_NETWORK_IPV6) &&
1268             rec->rec_type != SA_PATH_REC_TYPE_ROCE_V2)
1269                 return -EINVAL;
1270
1271         idev = device->get_netdev(device, port_num);
1272         if (!idev)
1273                 return -ENODEV;
1274
1275         resolved_dev = dev_get_by_index(dev_addr.net,
1276                                         dev_addr.bound_dev_if);
1277         if (!resolved_dev) {
1278                 ret = -ENODEV;
1279                 goto done;
1280         }
1281         ndev = ib_get_ndev_from_path(rec);
1282         rcu_read_lock();
1283         if ((ndev && ndev != resolved_dev) ||
1284             (resolved_dev != idev &&
1285              !rdma_is_upper_dev_rcu(idev, resolved_dev)))
1286                 ret = -EHOSTUNREACH;
1287         rcu_read_unlock();
1288         dev_put(resolved_dev);
1289         if (ndev)
1290                 dev_put(ndev);
1291 done:
1292         dev_put(idev);
1293         if (!ret)
1294                 rec->roce.route_resolved = true;
1295         return ret;
1296 }
1297
1298 static int init_ah_attr_grh_fields(struct ib_device *device, u8 port_num,
1299                                    struct sa_path_rec *rec,
1300                                    struct rdma_ah_attr *ah_attr)
1301 {
1302         enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
1303         struct net_device *ndev;
1304         u16 gid_index;
1305         int ret;
1306
1307         ndev = ib_get_ndev_from_path(rec);
1308         ret = ib_find_cached_gid_by_port(device, &rec->sgid, type,
1309                                          port_num, ndev, &gid_index);
1310         if (ndev)
1311                 dev_put(ndev);
1312         if (ret)
1313                 return ret;
1314
1315         rdma_ah_set_grh(ah_attr, &rec->dgid,
1316                         be32_to_cpu(rec->flow_label),
1317                         gid_index, rec->hop_limit,
1318                         rec->traffic_class);
1319         return 0;
1320 }
1321
1322 int ib_init_ah_attr_from_path(struct ib_device *device, u8 port_num,
1323                               struct sa_path_rec *rec,
1324                               struct rdma_ah_attr *ah_attr)
1325 {
1326         int ret = 0;
1327
1328         memset(ah_attr, 0, sizeof(*ah_attr));
1329         ah_attr->type = rdma_ah_find_type(device, port_num);
1330         rdma_ah_set_sl(ah_attr, rec->sl);
1331         rdma_ah_set_port_num(ah_attr, port_num);
1332         rdma_ah_set_static_rate(ah_attr, rec->rate);
1333
1334         if (sa_path_is_roce(rec)) {
1335                 ret = roce_resolve_route_from_path(device, port_num, rec);
1336                 if (ret)
1337                         return ret;
1338
1339                 memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN);
1340         } else {
1341                 rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
1342                 if (sa_path_is_opa(rec) &&
1343                     rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE))
1344                         rdma_ah_set_make_grd(ah_attr, true);
1345
1346                 rdma_ah_set_path_bits(ah_attr,
1347                                       be32_to_cpu(sa_path_get_slid(rec)) &
1348                                       get_src_path_mask(device, port_num));
1349         }
1350
1351         if (rec->hop_limit > 0 || sa_path_is_roce(rec))
1352                 ret = init_ah_attr_grh_fields(device, port_num, rec, ah_attr);
1353         return ret;
1354 }
1355 EXPORT_SYMBOL(ib_init_ah_attr_from_path);
1356
1357 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1358 {
1359         struct rdma_ah_attr ah_attr;
1360         unsigned long flags;
1361
1362         spin_lock_irqsave(&query->port->ah_lock, flags);
1363         if (!query->port->sm_ah) {
1364                 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1365                 return -EAGAIN;
1366         }
1367         kref_get(&query->port->sm_ah->ref);
1368         query->sm_ah = query->port->sm_ah;
1369         spin_unlock_irqrestore(&query->port->ah_lock, flags);
1370
1371         /*
1372          * Always check if sm_ah has valid dlid assigned,
1373          * before querying for class port info
1374          */
1375         if ((rdma_query_ah(query->sm_ah->ah, &ah_attr) < 0) ||
1376             !rdma_is_valid_unicast_lid(&ah_attr)) {
1377                 kref_put(&query->sm_ah->ref, free_sm_ah);
1378                 return -EAGAIN;
1379         }
1380         query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1381                                             query->sm_ah->pkey_index,
1382                                             0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1383                                             gfp_mask,
1384                                             ((query->flags & IB_SA_QUERY_OPA) ?
1385                                              OPA_MGMT_BASE_VERSION :
1386                                              IB_MGMT_BASE_VERSION));
1387         if (IS_ERR(query->mad_buf)) {
1388                 kref_put(&query->sm_ah->ref, free_sm_ah);
1389                 return -ENOMEM;
1390         }
1391
1392         query->mad_buf->ah = query->sm_ah->ah;
1393
1394         return 0;
1395 }
1396
1397 static void free_mad(struct ib_sa_query *query)
1398 {
1399         ib_free_send_mad(query->mad_buf);
1400         kref_put(&query->sm_ah->ref, free_sm_ah);
1401 }
1402
1403 static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent)
1404 {
1405         struct ib_sa_mad *mad = query->mad_buf->mad;
1406         unsigned long flags;
1407
1408         memset(mad, 0, sizeof *mad);
1409
1410         if (query->flags & IB_SA_QUERY_OPA) {
1411                 mad->mad_hdr.base_version  = OPA_MGMT_BASE_VERSION;
1412                 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION;
1413         } else {
1414                 mad->mad_hdr.base_version  = IB_MGMT_BASE_VERSION;
1415                 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1416         }
1417         mad->mad_hdr.mgmt_class    = IB_MGMT_CLASS_SUBN_ADM;
1418         spin_lock_irqsave(&tid_lock, flags);
1419         mad->mad_hdr.tid           =
1420                 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1421         spin_unlock_irqrestore(&tid_lock, flags);
1422 }
1423
1424 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1425 {
1426         bool preload = gfpflags_allow_blocking(gfp_mask);
1427         unsigned long flags;
1428         int ret, id;
1429
1430         if (preload)
1431                 idr_preload(gfp_mask);
1432         spin_lock_irqsave(&idr_lock, flags);
1433
1434         id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1435
1436         spin_unlock_irqrestore(&idr_lock, flags);
1437         if (preload)
1438                 idr_preload_end();
1439         if (id < 0)
1440                 return id;
1441
1442         query->mad_buf->timeout_ms  = timeout_ms;
1443         query->mad_buf->context[0] = query;
1444         query->id = id;
1445
1446         if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) &&
1447             (!(query->flags & IB_SA_QUERY_OPA))) {
1448                 if (!rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) {
1449                         if (!ib_nl_make_request(query, gfp_mask))
1450                                 return id;
1451                 }
1452                 ib_sa_disable_local_svc(query);
1453         }
1454
1455         ret = ib_post_send_mad(query->mad_buf, NULL);
1456         if (ret) {
1457                 spin_lock_irqsave(&idr_lock, flags);
1458                 idr_remove(&query_idr, id);
1459                 spin_unlock_irqrestore(&idr_lock, flags);
1460         }
1461
1462         /*
1463          * It's not safe to dereference query any more, because the
1464          * send may already have completed and freed the query in
1465          * another context.
1466          */
1467         return ret ? ret : id;
1468 }
1469
1470 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
1471 {
1472         ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1473 }
1474 EXPORT_SYMBOL(ib_sa_unpack_path);
1475
1476 void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute)
1477 {
1478         ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1479 }
1480 EXPORT_SYMBOL(ib_sa_pack_path);
1481
1482 static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client,
1483                                          struct ib_device *device,
1484                                          u8 port_num)
1485 {
1486         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1487         struct ib_sa_port *port;
1488         unsigned long flags;
1489         bool ret = false;
1490
1491         if (!sa_dev)
1492                 return ret;
1493
1494         port = &sa_dev->port[port_num - sa_dev->start_port];
1495         spin_lock_irqsave(&port->classport_lock, flags);
1496         if (!port->classport_info.valid)
1497                 goto ret;
1498
1499         if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA)
1500                 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) &
1501                         OPA_CLASS_PORT_INFO_PR_SUPPORT;
1502 ret:
1503         spin_unlock_irqrestore(&port->classport_lock, flags);
1504         return ret;
1505 }
1506
1507 enum opa_pr_supported {
1508         PR_NOT_SUPPORTED,
1509         PR_OPA_SUPPORTED,
1510         PR_IB_SUPPORTED
1511 };
1512
1513 /**
1514  * Check if current PR query can be an OPA query.
1515  * Retuns PR_NOT_SUPPORTED if a path record query is not
1516  * possible, PR_OPA_SUPPORTED if an OPA path record query
1517  * is possible and PR_IB_SUPPORTED if an IB path record
1518  * query is possible.
1519  */
1520 static int opa_pr_query_possible(struct ib_sa_client *client,
1521                                  struct ib_device *device,
1522                                  u8 port_num,
1523                                  struct sa_path_rec *rec)
1524 {
1525         struct ib_port_attr port_attr;
1526
1527         if (ib_query_port(device, port_num, &port_attr))
1528                 return PR_NOT_SUPPORTED;
1529
1530         if (ib_sa_opa_pathrecord_support(client, device, port_num))
1531                 return PR_OPA_SUPPORTED;
1532
1533         if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1534                 return PR_NOT_SUPPORTED;
1535         else
1536                 return PR_IB_SUPPORTED;
1537 }
1538
1539 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1540                                     int status,
1541                                     struct ib_sa_mad *mad)
1542 {
1543         struct ib_sa_path_query *query =
1544                 container_of(sa_query, struct ib_sa_path_query, sa_query);
1545
1546         if (mad) {
1547                 struct sa_path_rec rec;
1548
1549                 if (sa_query->flags & IB_SA_QUERY_OPA) {
1550                         ib_unpack(opa_path_rec_table,
1551                                   ARRAY_SIZE(opa_path_rec_table),
1552                                   mad->data, &rec);
1553                         rec.rec_type = SA_PATH_REC_TYPE_OPA;
1554                         query->callback(status, &rec, query->context);
1555                 } else {
1556                         ib_unpack(path_rec_table,
1557                                   ARRAY_SIZE(path_rec_table),
1558                                   mad->data, &rec);
1559                         rec.rec_type = SA_PATH_REC_TYPE_IB;
1560                         sa_path_set_ndev(&rec, NULL);
1561                         sa_path_set_ifindex(&rec, 0);
1562                         sa_path_set_dmac_zero(&rec);
1563
1564                         if (query->conv_pr) {
1565                                 struct sa_path_rec opa;
1566
1567                                 memset(&opa, 0, sizeof(struct sa_path_rec));
1568                                 sa_convert_path_ib_to_opa(&opa, &rec);
1569                                 query->callback(status, &opa, query->context);
1570                         } else {
1571                                 query->callback(status, &rec, query->context);
1572                         }
1573                 }
1574         } else
1575                 query->callback(status, NULL, query->context);
1576 }
1577
1578 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1579 {
1580         struct ib_sa_path_query *query =
1581                 container_of(sa_query, struct ib_sa_path_query, sa_query);
1582
1583         kfree(query->conv_pr);
1584         kfree(query);
1585 }
1586
1587 /**
1588  * ib_sa_path_rec_get - Start a Path get query
1589  * @client:SA client
1590  * @device:device to send query on
1591  * @port_num: port number to send query on
1592  * @rec:Path Record to send in query
1593  * @comp_mask:component mask to send in query
1594  * @timeout_ms:time to wait for response
1595  * @gfp_mask:GFP mask to use for internal allocations
1596  * @callback:function called when query completes, times out or is
1597  * canceled
1598  * @context:opaque user context passed to callback
1599  * @sa_query:query context, used to cancel query
1600  *
1601  * Send a Path Record Get query to the SA to look up a path.  The
1602  * callback function will be called when the query completes (or
1603  * fails); status is 0 for a successful response, -EINTR if the query
1604  * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1605  * occurred sending the query.  The resp parameter of the callback is
1606  * only valid if status is 0.
1607  *
1608  * If the return value of ib_sa_path_rec_get() is negative, it is an
1609  * error code.  Otherwise it is a query ID that can be used to cancel
1610  * the query.
1611  */
1612 int ib_sa_path_rec_get(struct ib_sa_client *client,
1613                        struct ib_device *device, u8 port_num,
1614                        struct sa_path_rec *rec,
1615                        ib_sa_comp_mask comp_mask,
1616                        int timeout_ms, gfp_t gfp_mask,
1617                        void (*callback)(int status,
1618                                         struct sa_path_rec *resp,
1619                                         void *context),
1620                        void *context,
1621                        struct ib_sa_query **sa_query)
1622 {
1623         struct ib_sa_path_query *query;
1624         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1625         struct ib_sa_port   *port;
1626         struct ib_mad_agent *agent;
1627         struct ib_sa_mad *mad;
1628         enum opa_pr_supported status;
1629         int ret;
1630
1631         if (!sa_dev)
1632                 return -ENODEV;
1633
1634         if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1635             (rec->rec_type != SA_PATH_REC_TYPE_OPA))
1636                 return -EINVAL;
1637
1638         port  = &sa_dev->port[port_num - sa_dev->start_port];
1639         agent = port->agent;
1640
1641         query = kzalloc(sizeof(*query), gfp_mask);
1642         if (!query)
1643                 return -ENOMEM;
1644
1645         query->sa_query.port     = port;
1646         if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1647                 status = opa_pr_query_possible(client, device, port_num, rec);
1648                 if (status == PR_NOT_SUPPORTED) {
1649                         ret = -EINVAL;
1650                         goto err1;
1651                 } else if (status == PR_OPA_SUPPORTED) {
1652                         query->sa_query.flags |= IB_SA_QUERY_OPA;
1653                 } else {
1654                         query->conv_pr =
1655                                 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1656                         if (!query->conv_pr) {
1657                                 ret = -ENOMEM;
1658                                 goto err1;
1659                         }
1660                 }
1661         }
1662
1663         ret = alloc_mad(&query->sa_query, gfp_mask);
1664         if (ret)
1665                 goto err2;
1666
1667         ib_sa_client_get(client);
1668         query->sa_query.client = client;
1669         query->callback        = callback;
1670         query->context         = context;
1671
1672         mad = query->sa_query.mad_buf->mad;
1673         init_mad(&query->sa_query, agent);
1674
1675         query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1676         query->sa_query.release  = ib_sa_path_rec_release;
1677         mad->mad_hdr.method      = IB_MGMT_METHOD_GET;
1678         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1679         mad->sa_hdr.comp_mask    = comp_mask;
1680
1681         if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1682                 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1683                         rec, mad->data);
1684         } else if (query->conv_pr) {
1685                 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1686                 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1687                         query->conv_pr, mad->data);
1688         } else {
1689                 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1690                         rec, mad->data);
1691         }
1692
1693         *sa_query = &query->sa_query;
1694
1695         query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1696         query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1697                                                 query->conv_pr : rec;
1698
1699         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1700         if (ret < 0)
1701                 goto err3;
1702
1703         return ret;
1704
1705 err3:
1706         *sa_query = NULL;
1707         ib_sa_client_put(query->sa_query.client);
1708         free_mad(&query->sa_query);
1709 err2:
1710         kfree(query->conv_pr);
1711 err1:
1712         kfree(query);
1713         return ret;
1714 }
1715 EXPORT_SYMBOL(ib_sa_path_rec_get);
1716
1717 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1718                                     int status,
1719                                     struct ib_sa_mad *mad)
1720 {
1721         struct ib_sa_service_query *query =
1722                 container_of(sa_query, struct ib_sa_service_query, sa_query);
1723
1724         if (mad) {
1725                 struct ib_sa_service_rec rec;
1726
1727                 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1728                           mad->data, &rec);
1729                 query->callback(status, &rec, query->context);
1730         } else
1731                 query->callback(status, NULL, query->context);
1732 }
1733
1734 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1735 {
1736         kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1737 }
1738
1739 /**
1740  * ib_sa_service_rec_query - Start Service Record operation
1741  * @client:SA client
1742  * @device:device to send request on
1743  * @port_num: port number to send request on
1744  * @method:SA method - should be get, set, or delete
1745  * @rec:Service Record to send in request
1746  * @comp_mask:component mask to send in request
1747  * @timeout_ms:time to wait for response
1748  * @gfp_mask:GFP mask to use for internal allocations
1749  * @callback:function called when request completes, times out or is
1750  * canceled
1751  * @context:opaque user context passed to callback
1752  * @sa_query:request context, used to cancel request
1753  *
1754  * Send a Service Record set/get/delete to the SA to register,
1755  * unregister or query a service record.
1756  * The callback function will be called when the request completes (or
1757  * fails); status is 0 for a successful response, -EINTR if the query
1758  * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1759  * occurred sending the query.  The resp parameter of the callback is
1760  * only valid if status is 0.
1761  *
1762  * If the return value of ib_sa_service_rec_query() is negative, it is an
1763  * error code.  Otherwise it is a request ID that can be used to cancel
1764  * the query.
1765  */
1766 int ib_sa_service_rec_query(struct ib_sa_client *client,
1767                             struct ib_device *device, u8 port_num, u8 method,
1768                             struct ib_sa_service_rec *rec,
1769                             ib_sa_comp_mask comp_mask,
1770                             int timeout_ms, gfp_t gfp_mask,
1771                             void (*callback)(int status,
1772                                              struct ib_sa_service_rec *resp,
1773                                              void *context),
1774                             void *context,
1775                             struct ib_sa_query **sa_query)
1776 {
1777         struct ib_sa_service_query *query;
1778         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1779         struct ib_sa_port   *port;
1780         struct ib_mad_agent *agent;
1781         struct ib_sa_mad *mad;
1782         int ret;
1783
1784         if (!sa_dev)
1785                 return -ENODEV;
1786
1787         port  = &sa_dev->port[port_num - sa_dev->start_port];
1788         agent = port->agent;
1789
1790         if (method != IB_MGMT_METHOD_GET &&
1791             method != IB_MGMT_METHOD_SET &&
1792             method != IB_SA_METHOD_DELETE)
1793                 return -EINVAL;
1794
1795         query = kzalloc(sizeof(*query), gfp_mask);
1796         if (!query)
1797                 return -ENOMEM;
1798
1799         query->sa_query.port     = port;
1800         ret = alloc_mad(&query->sa_query, gfp_mask);
1801         if (ret)
1802                 goto err1;
1803
1804         ib_sa_client_get(client);
1805         query->sa_query.client = client;
1806         query->callback        = callback;
1807         query->context         = context;
1808
1809         mad = query->sa_query.mad_buf->mad;
1810         init_mad(&query->sa_query, agent);
1811
1812         query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1813         query->sa_query.release  = ib_sa_service_rec_release;
1814         mad->mad_hdr.method      = method;
1815         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1816         mad->sa_hdr.comp_mask    = comp_mask;
1817
1818         ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1819                 rec, mad->data);
1820
1821         *sa_query = &query->sa_query;
1822
1823         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1824         if (ret < 0)
1825                 goto err2;
1826
1827         return ret;
1828
1829 err2:
1830         *sa_query = NULL;
1831         ib_sa_client_put(query->sa_query.client);
1832         free_mad(&query->sa_query);
1833
1834 err1:
1835         kfree(query);
1836         return ret;
1837 }
1838 EXPORT_SYMBOL(ib_sa_service_rec_query);
1839
1840 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1841                                         int status,
1842                                         struct ib_sa_mad *mad)
1843 {
1844         struct ib_sa_mcmember_query *query =
1845                 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1846
1847         if (mad) {
1848                 struct ib_sa_mcmember_rec rec;
1849
1850                 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1851                           mad->data, &rec);
1852                 query->callback(status, &rec, query->context);
1853         } else
1854                 query->callback(status, NULL, query->context);
1855 }
1856
1857 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1858 {
1859         kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1860 }
1861
1862 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1863                              struct ib_device *device, u8 port_num,
1864                              u8 method,
1865                              struct ib_sa_mcmember_rec *rec,
1866                              ib_sa_comp_mask comp_mask,
1867                              int timeout_ms, gfp_t gfp_mask,
1868                              void (*callback)(int status,
1869                                               struct ib_sa_mcmember_rec *resp,
1870                                               void *context),
1871                              void *context,
1872                              struct ib_sa_query **sa_query)
1873 {
1874         struct ib_sa_mcmember_query *query;
1875         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1876         struct ib_sa_port   *port;
1877         struct ib_mad_agent *agent;
1878         struct ib_sa_mad *mad;
1879         int ret;
1880
1881         if (!sa_dev)
1882                 return -ENODEV;
1883
1884         port  = &sa_dev->port[port_num - sa_dev->start_port];
1885         agent = port->agent;
1886
1887         query = kzalloc(sizeof(*query), gfp_mask);
1888         if (!query)
1889                 return -ENOMEM;
1890
1891         query->sa_query.port     = port;
1892         ret = alloc_mad(&query->sa_query, gfp_mask);
1893         if (ret)
1894                 goto err1;
1895
1896         ib_sa_client_get(client);
1897         query->sa_query.client = client;
1898         query->callback        = callback;
1899         query->context         = context;
1900
1901         mad = query->sa_query.mad_buf->mad;
1902         init_mad(&query->sa_query, agent);
1903
1904         query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1905         query->sa_query.release  = ib_sa_mcmember_rec_release;
1906         mad->mad_hdr.method      = method;
1907         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1908         mad->sa_hdr.comp_mask    = comp_mask;
1909
1910         ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1911                 rec, mad->data);
1912
1913         *sa_query = &query->sa_query;
1914
1915         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1916         if (ret < 0)
1917                 goto err2;
1918
1919         return ret;
1920
1921 err2:
1922         *sa_query = NULL;
1923         ib_sa_client_put(query->sa_query.client);
1924         free_mad(&query->sa_query);
1925
1926 err1:
1927         kfree(query);
1928         return ret;
1929 }
1930
1931 /* Support GuidInfoRecord */
1932 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1933                                         int status,
1934                                         struct ib_sa_mad *mad)
1935 {
1936         struct ib_sa_guidinfo_query *query =
1937                 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1938
1939         if (mad) {
1940                 struct ib_sa_guidinfo_rec rec;
1941
1942                 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1943                           mad->data, &rec);
1944                 query->callback(status, &rec, query->context);
1945         } else
1946                 query->callback(status, NULL, query->context);
1947 }
1948
1949 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1950 {
1951         kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1952 }
1953
1954 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1955                               struct ib_device *device, u8 port_num,
1956                               struct ib_sa_guidinfo_rec *rec,
1957                               ib_sa_comp_mask comp_mask, u8 method,
1958                               int timeout_ms, gfp_t gfp_mask,
1959                               void (*callback)(int status,
1960                                                struct ib_sa_guidinfo_rec *resp,
1961                                                void *context),
1962                               void *context,
1963                               struct ib_sa_query **sa_query)
1964 {
1965         struct ib_sa_guidinfo_query *query;
1966         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1967         struct ib_sa_port *port;
1968         struct ib_mad_agent *agent;
1969         struct ib_sa_mad *mad;
1970         int ret;
1971
1972         if (!sa_dev)
1973                 return -ENODEV;
1974
1975         if (method != IB_MGMT_METHOD_GET &&
1976             method != IB_MGMT_METHOD_SET &&
1977             method != IB_SA_METHOD_DELETE) {
1978                 return -EINVAL;
1979         }
1980
1981         port  = &sa_dev->port[port_num - sa_dev->start_port];
1982         agent = port->agent;
1983
1984         query = kzalloc(sizeof(*query), gfp_mask);
1985         if (!query)
1986                 return -ENOMEM;
1987
1988         query->sa_query.port = port;
1989         ret = alloc_mad(&query->sa_query, gfp_mask);
1990         if (ret)
1991                 goto err1;
1992
1993         ib_sa_client_get(client);
1994         query->sa_query.client = client;
1995         query->callback        = callback;
1996         query->context         = context;
1997
1998         mad = query->sa_query.mad_buf->mad;
1999         init_mad(&query->sa_query, agent);
2000
2001         query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
2002         query->sa_query.release  = ib_sa_guidinfo_rec_release;
2003
2004         mad->mad_hdr.method      = method;
2005         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
2006         mad->sa_hdr.comp_mask    = comp_mask;
2007
2008         ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
2009                 mad->data);
2010
2011         *sa_query = &query->sa_query;
2012
2013         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2014         if (ret < 0)
2015                 goto err2;
2016
2017         return ret;
2018
2019 err2:
2020         *sa_query = NULL;
2021         ib_sa_client_put(query->sa_query.client);
2022         free_mad(&query->sa_query);
2023
2024 err1:
2025         kfree(query);
2026         return ret;
2027 }
2028 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
2029
2030 bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
2031                                     struct ib_device *device,
2032                                     u8 port_num)
2033 {
2034         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
2035         struct ib_sa_port *port;
2036         bool ret = false;
2037         unsigned long flags;
2038
2039         if (!sa_dev)
2040                 return ret;
2041
2042         port  = &sa_dev->port[port_num - sa_dev->start_port];
2043
2044         spin_lock_irqsave(&port->classport_lock, flags);
2045         if ((port->classport_info.valid) &&
2046             (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
2047                 ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
2048                         & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
2049         spin_unlock_irqrestore(&port->classport_lock, flags);
2050         return ret;
2051 }
2052 EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
2053
2054 struct ib_classport_info_context {
2055         struct completion       done;
2056         struct ib_sa_query      *sa_query;
2057 };
2058
2059 static void ib_classportinfo_cb(void *context)
2060 {
2061         struct ib_classport_info_context *cb_ctx = context;
2062
2063         complete(&cb_ctx->done);
2064 }
2065
2066 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
2067                                               int status,
2068                                               struct ib_sa_mad *mad)
2069 {
2070         unsigned long flags;
2071         struct ib_sa_classport_info_query *query =
2072                 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
2073         struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
2074
2075         if (mad) {
2076                 if (sa_query->flags & IB_SA_QUERY_OPA) {
2077                         struct opa_class_port_info rec;
2078
2079                         ib_unpack(opa_classport_info_rec_table,
2080                                   ARRAY_SIZE(opa_classport_info_rec_table),
2081                                   mad->data, &rec);
2082
2083                         spin_lock_irqsave(&sa_query->port->classport_lock,
2084                                           flags);
2085                         if (!status && !info->valid) {
2086                                 memcpy(&info->data.opa, &rec,
2087                                        sizeof(info->data.opa));
2088
2089                                 info->valid = true;
2090                                 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
2091                         }
2092                         spin_unlock_irqrestore(&sa_query->port->classport_lock,
2093                                                flags);
2094
2095                 } else {
2096                         struct ib_class_port_info rec;
2097
2098                         ib_unpack(ib_classport_info_rec_table,
2099                                   ARRAY_SIZE(ib_classport_info_rec_table),
2100                                   mad->data, &rec);
2101
2102                         spin_lock_irqsave(&sa_query->port->classport_lock,
2103                                           flags);
2104                         if (!status && !info->valid) {
2105                                 memcpy(&info->data.ib, &rec,
2106                                        sizeof(info->data.ib));
2107
2108                                 info->valid = true;
2109                                 info->data.type = RDMA_CLASS_PORT_INFO_IB;
2110                         }
2111                         spin_unlock_irqrestore(&sa_query->port->classport_lock,
2112                                                flags);
2113                 }
2114         }
2115         query->callback(query->context);
2116 }
2117
2118 static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
2119 {
2120         kfree(container_of(sa_query, struct ib_sa_classport_info_query,
2121                            sa_query));
2122 }
2123
2124 static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
2125                                           int timeout_ms,
2126                                           void (*callback)(void *context),
2127                                           void *context,
2128                                           struct ib_sa_query **sa_query)
2129 {
2130         struct ib_mad_agent *agent;
2131         struct ib_sa_classport_info_query *query;
2132         struct ib_sa_mad *mad;
2133         gfp_t gfp_mask = GFP_KERNEL;
2134         int ret;
2135
2136         agent = port->agent;
2137
2138         query = kzalloc(sizeof(*query), gfp_mask);
2139         if (!query)
2140                 return -ENOMEM;
2141
2142         query->sa_query.port = port;
2143         query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
2144                                                  port->port_num) ?
2145                                  IB_SA_QUERY_OPA : 0;
2146         ret = alloc_mad(&query->sa_query, gfp_mask);
2147         if (ret)
2148                 goto err_free;
2149
2150         query->callback = callback;
2151         query->context = context;
2152
2153         mad = query->sa_query.mad_buf->mad;
2154         init_mad(&query->sa_query, agent);
2155
2156         query->sa_query.callback = ib_sa_classport_info_rec_callback;
2157         query->sa_query.release  = ib_sa_classport_info_rec_release;
2158         mad->mad_hdr.method      = IB_MGMT_METHOD_GET;
2159         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
2160         mad->sa_hdr.comp_mask    = 0;
2161         *sa_query = &query->sa_query;
2162
2163         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2164         if (ret < 0)
2165                 goto err_free_mad;
2166
2167         return ret;
2168
2169 err_free_mad:
2170         *sa_query = NULL;
2171         free_mad(&query->sa_query);
2172
2173 err_free:
2174         kfree(query);
2175         return ret;
2176 }
2177
2178 static void update_ib_cpi(struct work_struct *work)
2179 {
2180         struct ib_sa_port *port =
2181                 container_of(work, struct ib_sa_port, ib_cpi_work.work);
2182         struct ib_classport_info_context *cb_context;
2183         unsigned long flags;
2184         int ret;
2185
2186         /* If the classport info is valid, nothing
2187          * to do here.
2188          */
2189         spin_lock_irqsave(&port->classport_lock, flags);
2190         if (port->classport_info.valid) {
2191                 spin_unlock_irqrestore(&port->classport_lock, flags);
2192                 return;
2193         }
2194         spin_unlock_irqrestore(&port->classport_lock, flags);
2195
2196         cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
2197         if (!cb_context)
2198                 goto err_nomem;
2199
2200         init_completion(&cb_context->done);
2201
2202         ret = ib_sa_classport_info_rec_query(port, 3000,
2203                                              ib_classportinfo_cb, cb_context,
2204                                              &cb_context->sa_query);
2205         if (ret < 0)
2206                 goto free_cb_err;
2207         wait_for_completion(&cb_context->done);
2208 free_cb_err:
2209         kfree(cb_context);
2210         spin_lock_irqsave(&port->classport_lock, flags);
2211
2212         /* If the classport info is still not valid, the query should have
2213          * failed for some reason. Retry issuing the query
2214          */
2215         if (!port->classport_info.valid) {
2216                 port->classport_info.retry_cnt++;
2217                 if (port->classport_info.retry_cnt <=
2218                     IB_SA_CPI_MAX_RETRY_CNT) {
2219                         unsigned long delay =
2220                                 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2221
2222                         queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
2223                 }
2224         }
2225         spin_unlock_irqrestore(&port->classport_lock, flags);
2226
2227 err_nomem:
2228         return;
2229 }
2230
2231 static void send_handler(struct ib_mad_agent *agent,
2232                          struct ib_mad_send_wc *mad_send_wc)
2233 {
2234         struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
2235         unsigned long flags;
2236
2237         if (query->callback)
2238                 switch (mad_send_wc->status) {
2239                 case IB_WC_SUCCESS:
2240                         /* No callback -- already got recv */
2241                         break;
2242                 case IB_WC_RESP_TIMEOUT_ERR:
2243                         query->callback(query, -ETIMEDOUT, NULL);
2244                         break;
2245                 case IB_WC_WR_FLUSH_ERR:
2246                         query->callback(query, -EINTR, NULL);
2247                         break;
2248                 default:
2249                         query->callback(query, -EIO, NULL);
2250                         break;
2251                 }
2252
2253         spin_lock_irqsave(&idr_lock, flags);
2254         idr_remove(&query_idr, query->id);
2255         spin_unlock_irqrestore(&idr_lock, flags);
2256
2257         free_mad(query);
2258         if (query->client)
2259                 ib_sa_client_put(query->client);
2260         query->release(query);
2261 }
2262
2263 static void recv_handler(struct ib_mad_agent *mad_agent,
2264                          struct ib_mad_send_buf *send_buf,
2265                          struct ib_mad_recv_wc *mad_recv_wc)
2266 {
2267         struct ib_sa_query *query;
2268
2269         if (!send_buf)
2270                 return;
2271
2272         query = send_buf->context[0];
2273         if (query->callback) {
2274                 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2275                         query->callback(query,
2276                                         mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2277                                         -EINVAL : 0,
2278                                         (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2279                 else
2280                         query->callback(query, -EIO, NULL);
2281         }
2282
2283         ib_free_recv_mad(mad_recv_wc);
2284 }
2285
2286 static void update_sm_ah(struct work_struct *work)
2287 {
2288         struct ib_sa_port *port =
2289                 container_of(work, struct ib_sa_port, update_task);
2290         struct ib_sa_sm_ah *new_ah;
2291         struct ib_port_attr port_attr;
2292         struct rdma_ah_attr   ah_attr;
2293
2294         if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2295                 pr_warn("Couldn't query port\n");
2296                 return;
2297         }
2298
2299         new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2300         if (!new_ah)
2301                 return;
2302
2303         kref_init(&new_ah->ref);
2304         new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2305
2306         new_ah->pkey_index = 0;
2307         if (ib_find_pkey(port->agent->device, port->port_num,
2308                          IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2309                 pr_err("Couldn't find index for default PKey\n");
2310
2311         memset(&ah_attr, 0, sizeof(ah_attr));
2312         ah_attr.type = rdma_ah_find_type(port->agent->device,
2313                                          port->port_num);
2314         rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2315         rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2316         rdma_ah_set_port_num(&ah_attr, port->port_num);
2317         if (port_attr.grh_required) {
2318                 if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA) {
2319                         rdma_ah_set_make_grd(&ah_attr, true);
2320                 } else {
2321                         rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2322                         rdma_ah_set_subnet_prefix(&ah_attr,
2323                                                   cpu_to_be64(port_attr.subnet_prefix));
2324                         rdma_ah_set_interface_id(&ah_attr,
2325                                                  cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2326                 }
2327         }
2328
2329         new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr);
2330         if (IS_ERR(new_ah->ah)) {
2331                 pr_warn("Couldn't create new SM AH\n");
2332                 kfree(new_ah);
2333                 return;
2334         }
2335
2336         spin_lock_irq(&port->ah_lock);
2337         if (port->sm_ah)
2338                 kref_put(&port->sm_ah->ref, free_sm_ah);
2339         port->sm_ah = new_ah;
2340         spin_unlock_irq(&port->ah_lock);
2341 }
2342
2343 static void ib_sa_event(struct ib_event_handler *handler,
2344                         struct ib_event *event)
2345 {
2346         if (event->event == IB_EVENT_PORT_ERR    ||
2347             event->event == IB_EVENT_PORT_ACTIVE ||
2348             event->event == IB_EVENT_LID_CHANGE  ||
2349             event->event == IB_EVENT_PKEY_CHANGE ||
2350             event->event == IB_EVENT_SM_CHANGE   ||
2351             event->event == IB_EVENT_CLIENT_REREGISTER) {
2352                 unsigned long flags;
2353                 struct ib_sa_device *sa_dev =
2354                         container_of(handler, typeof(*sa_dev), event_handler);
2355                 u8 port_num = event->element.port_num - sa_dev->start_port;
2356                 struct ib_sa_port *port = &sa_dev->port[port_num];
2357
2358                 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2359                         return;
2360
2361                 spin_lock_irqsave(&port->ah_lock, flags);
2362                 if (port->sm_ah)
2363                         kref_put(&port->sm_ah->ref, free_sm_ah);
2364                 port->sm_ah = NULL;
2365                 spin_unlock_irqrestore(&port->ah_lock, flags);
2366
2367                 if (event->event == IB_EVENT_SM_CHANGE ||
2368                     event->event == IB_EVENT_CLIENT_REREGISTER ||
2369                     event->event == IB_EVENT_LID_CHANGE ||
2370                     event->event == IB_EVENT_PORT_ACTIVE) {
2371                         unsigned long delay =
2372                                 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2373
2374                         spin_lock_irqsave(&port->classport_lock, flags);
2375                         port->classport_info.valid = false;
2376                         port->classport_info.retry_cnt = 0;
2377                         spin_unlock_irqrestore(&port->classport_lock, flags);
2378                         queue_delayed_work(ib_wq,
2379                                            &port->ib_cpi_work, delay);
2380                 }
2381                 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2382         }
2383 }
2384
2385 static void ib_sa_add_one(struct ib_device *device)
2386 {
2387         struct ib_sa_device *sa_dev;
2388         int s, e, i;
2389         int count = 0;
2390
2391         s = rdma_start_port(device);
2392         e = rdma_end_port(device);
2393
2394         sa_dev = kzalloc(sizeof *sa_dev +
2395                          (e - s + 1) * sizeof (struct ib_sa_port),
2396                          GFP_KERNEL);
2397         if (!sa_dev)
2398                 return;
2399
2400         sa_dev->start_port = s;
2401         sa_dev->end_port   = e;
2402
2403         for (i = 0; i <= e - s; ++i) {
2404                 spin_lock_init(&sa_dev->port[i].ah_lock);
2405                 if (!rdma_cap_ib_sa(device, i + 1))
2406                         continue;
2407
2408                 sa_dev->port[i].sm_ah    = NULL;
2409                 sa_dev->port[i].port_num = i + s;
2410
2411                 spin_lock_init(&sa_dev->port[i].classport_lock);
2412                 sa_dev->port[i].classport_info.valid = false;
2413
2414                 sa_dev->port[i].agent =
2415                         ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2416                                               NULL, 0, send_handler,
2417                                               recv_handler, sa_dev, 0);
2418                 if (IS_ERR(sa_dev->port[i].agent))
2419                         goto err;
2420
2421                 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
2422                 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2423                                   update_ib_cpi);
2424
2425                 count++;
2426         }
2427
2428         if (!count)
2429                 goto free;
2430
2431         ib_set_client_data(device, &sa_client, sa_dev);
2432
2433         /*
2434          * We register our event handler after everything is set up,
2435          * and then update our cached info after the event handler is
2436          * registered to avoid any problems if a port changes state
2437          * during our initialization.
2438          */
2439
2440         INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
2441         ib_register_event_handler(&sa_dev->event_handler);
2442
2443         for (i = 0; i <= e - s; ++i) {
2444                 if (rdma_cap_ib_sa(device, i + 1))
2445                         update_sm_ah(&sa_dev->port[i].update_task);
2446         }
2447
2448         return;
2449
2450 err:
2451         while (--i >= 0) {
2452                 if (rdma_cap_ib_sa(device, i + 1))
2453                         ib_unregister_mad_agent(sa_dev->port[i].agent);
2454         }
2455 free:
2456         kfree(sa_dev);
2457         return;
2458 }
2459
2460 static void ib_sa_remove_one(struct ib_device *device, void *client_data)
2461 {
2462         struct ib_sa_device *sa_dev = client_data;
2463         int i;
2464
2465         if (!sa_dev)
2466                 return;
2467
2468         ib_unregister_event_handler(&sa_dev->event_handler);
2469         flush_workqueue(ib_wq);
2470
2471         for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
2472                 if (rdma_cap_ib_sa(device, i + 1)) {
2473                         cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
2474                         ib_unregister_mad_agent(sa_dev->port[i].agent);
2475                         if (sa_dev->port[i].sm_ah)
2476                                 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2477                 }
2478
2479         }
2480
2481         kfree(sa_dev);
2482 }
2483
2484 int ib_sa_init(void)
2485 {
2486         int ret;
2487
2488         get_random_bytes(&tid, sizeof tid);
2489
2490         atomic_set(&ib_nl_sa_request_seq, 0);
2491
2492         ret = ib_register_client(&sa_client);
2493         if (ret) {
2494                 pr_err("Couldn't register ib_sa client\n");
2495                 goto err1;
2496         }
2497
2498         ret = mcast_init();
2499         if (ret) {
2500                 pr_err("Couldn't initialize multicast handling\n");
2501                 goto err2;
2502         }
2503
2504         ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2505         if (!ib_nl_wq) {
2506                 ret = -ENOMEM;
2507                 goto err3;
2508         }
2509
2510         INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2511
2512         return 0;
2513
2514 err3:
2515         mcast_cleanup();
2516 err2:
2517         ib_unregister_client(&sa_client);
2518 err1:
2519         return ret;
2520 }
2521
2522 void ib_sa_cleanup(void)
2523 {
2524         cancel_delayed_work(&ib_nl_timed_work);
2525         flush_workqueue(ib_nl_wq);
2526         destroy_workqueue(ib_nl_wq);
2527         mcast_cleanup();
2528         ib_unregister_client(&sa_client);
2529         idr_destroy(&query_idr);
2530 }