drivers/infiniband/core/sa_query.c

   1 /*
   2  * Copyright (c) 2004 Topspin Communications.  All rights reserved.
   3  * Copyright (c) 2005 Voltaire, Inc.  All rights reserved.
   4  * Copyright (c) 2006 Intel Corporation.  All rights reserved.
   5  *
   6  * This software is available to you under a choice of one of two
   7  * licenses.  You may choose to be licensed under the terms of the GNU
   8  * General Public License (GPL) Version 2, available from the file
   9  * COPYING in the main directory of this source tree, or the
  10  * OpenIB.org BSD license below:
  11  *
  12  *     Redistribution and use in source and binary forms, with or
  13  *     without modification, are permitted provided that the following
  14  *     conditions are met:
  15  *
  16  *      - Redistributions of source code must retain the above
  17  *        copyright notice, this list of conditions and the following
  18  *        disclaimer.
  19  *
  20  *      - Redistributions in binary form must reproduce the above
  21  *        copyright notice, this list of conditions and the following
  22  *        disclaimer in the documentation and/or other materials
  23  *        provided with the distribution.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  29  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  30  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  31  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  32  * SOFTWARE.
  33  */
  34
  35 #include <linux/module.h>
  36 #include <linux/init.h>
  37 #include <linux/err.h>
  38 #include <linux/random.h>
  39 #include <linux/spinlock.h>
  40 #include <linux/slab.h>
  41 #include <linux/dma-mapping.h>
  42 #include <linux/kref.h>
  43 #include <linux/idr.h>
  44 #include <linux/workqueue.h>
  45 #include <uapi/linux/if_ether.h>
  46 #include <rdma/ib_pack.h>
  47 #include <rdma/ib_cache.h>
  48 #include <rdma/rdma_netlink.h>
  49 #include <net/netlink.h>
  50 #include <uapi/rdma/ib_user_sa.h>
  51 #include <rdma/ib_marshall.h>
  52 #include <rdma/ib_addr.h>
  53 #include <rdma/opa_addr.h>
  54 #include "sa.h"
  55 #include "core_priv.h"
  56
  57 #define IB_SA_LOCAL_SVC_TIMEOUT_MIN             100
  58 #define IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT         2000
  59 #define IB_SA_LOCAL_SVC_TIMEOUT_MAX             200000
  60 #define IB_SA_CPI_MAX_RETRY_CNT                 3
  61 #define IB_SA_CPI_RETRY_WAIT                    1000 /*msecs */
  62 static int sa_local_svc_timeout_ms = IB_SA_LOCAL_SVC_TIMEOUT_DEFAULT;
  63
  64 struct ib_sa_sm_ah {
  65         struct ib_ah        *ah;
  66         struct kref          ref;
  67         u16                  pkey_index;
  68         u8                   src_path_mask;
  69 };
  70
  71 enum rdma_class_port_info_type {
  72         RDMA_CLASS_PORT_INFO_IB,
  73         RDMA_CLASS_PORT_INFO_OPA
  74 };
  75
  76 struct rdma_class_port_info {
  77         enum rdma_class_port_info_type type;
  78         union {
  79                 struct ib_class_port_info ib;
  80                 struct opa_class_port_info opa;
  81         };
  82 };
  83
  84 struct ib_sa_classport_cache {
  85         bool valid;
  86         int retry_cnt;
  87         struct rdma_class_port_info data;
  88 };
  89
  90 struct ib_sa_port {
  91         struct ib_mad_agent *agent;
  92         struct ib_sa_sm_ah  *sm_ah;
  93         struct work_struct   update_task;
  94         struct ib_sa_classport_cache classport_info;
  95         struct delayed_work ib_cpi_work;
  96         spinlock_t                   classport_lock; /* protects class port info set */
  97         spinlock_t           ah_lock;
  98         u8                   port_num;
  99 };
 100
 101 struct ib_sa_device {
 102         int                     start_port, end_port;
 103         struct ib_event_handler event_handler;
 104         struct ib_sa_port port[0];
 105 };
 106
 107 struct ib_sa_query {
 108         void (*callback)(struct ib_sa_query *, int, struct ib_sa_mad *);
 109         void (*release)(struct ib_sa_query *);
 110         struct ib_sa_client    *client;
 111         struct ib_sa_port      *port;
 112         struct ib_mad_send_buf *mad_buf;
 113         struct ib_sa_sm_ah     *sm_ah;
 114         int                     id;
 115         u32                     flags;
 116         struct list_head        list; /* Local svc request list */
 117         u32                     seq; /* Local svc request sequence number */
 118         unsigned long           timeout; /* Local svc timeout */
 119         u8                      path_use; /* How will the pathrecord be used */
 120 };
 121
 122 #define IB_SA_ENABLE_LOCAL_SERVICE      0x00000001
 123 #define IB_SA_CANCEL                    0x00000002
 124 #define IB_SA_QUERY_OPA                 0x00000004
 125
 126 struct ib_sa_service_query {
 127         void (*callback)(int, struct ib_sa_service_rec *, void *);
 128         void *context;
 129         struct ib_sa_query sa_query;
 130 };
 131
 132 struct ib_sa_path_query {
 133         void (*callback)(int, struct sa_path_rec *, void *);
 134         void *context;
 135         struct ib_sa_query sa_query;
 136         struct sa_path_rec *conv_pr;
 137 };
 138
 139 struct ib_sa_guidinfo_query {
 140         void (*callback)(int, struct ib_sa_guidinfo_rec *, void *);
 141         void *context;
 142         struct ib_sa_query sa_query;
 143 };
 144
 145 struct ib_sa_classport_info_query {
 146         void (*callback)(void *);
 147         void *context;
 148         struct ib_sa_query sa_query;
 149 };
 150
 151 struct ib_sa_mcmember_query {
 152         void (*callback)(int, struct ib_sa_mcmember_rec *, void *);
 153         void *context;
 154         struct ib_sa_query sa_query;
 155 };
 156
 157 static LIST_HEAD(ib_nl_request_list);
 158 static DEFINE_SPINLOCK(ib_nl_request_lock);
 159 static atomic_t ib_nl_sa_request_seq;
 160 static struct workqueue_struct *ib_nl_wq;
 161 static struct delayed_work ib_nl_timed_work;
 162 static const struct nla_policy ib_nl_policy[LS_NLA_TYPE_MAX] = {
 163         [LS_NLA_TYPE_PATH_RECORD]       = {.type = NLA_BINARY,
 164                 .len = sizeof(struct ib_path_rec_data)},
 165         [LS_NLA_TYPE_TIMEOUT]           = {.type = NLA_U32},
 166         [LS_NLA_TYPE_SERVICE_ID]        = {.type = NLA_U64},
 167         [LS_NLA_TYPE_DGID]              = {.type = NLA_BINARY,
 168                 .len = sizeof(struct rdma_nla_ls_gid)},
 169         [LS_NLA_TYPE_SGID]              = {.type = NLA_BINARY,
 170                 .len = sizeof(struct rdma_nla_ls_gid)},
 171         [LS_NLA_TYPE_TCLASS]            = {.type = NLA_U8},
 172         [LS_NLA_TYPE_PKEY]              = {.type = NLA_U16},
 173         [LS_NLA_TYPE_QOS_CLASS]         = {.type = NLA_U16},
 174 };
 175
 176
 177 static void ib_sa_add_one(struct ib_device *device);
 178 static void ib_sa_remove_one(struct ib_device *device, void *client_data);
 179
 180 static struct ib_client sa_client = {
 181         .name   = "sa",
 182         .add    = ib_sa_add_one,
 183         .remove = ib_sa_remove_one
 184 };
 185
 186 static DEFINE_SPINLOCK(idr_lock);
 187 static DEFINE_IDR(query_idr);
 188
 189 static DEFINE_SPINLOCK(tid_lock);
 190 static u32 tid;
 191
 192 #define PATH_REC_FIELD(field) \
 193         .struct_offset_bytes = offsetof(struct sa_path_rec, field),     \
 194         .struct_size_bytes   = sizeof((struct sa_path_rec *)0)->field,  \
 195         .field_name          = "sa_path_rec:" #field
 196
 197 static const struct ib_field path_rec_table[] = {
 198         { PATH_REC_FIELD(service_id),
 199           .offset_words = 0,
 200           .offset_bits  = 0,
 201           .size_bits    = 64 },
 202         { PATH_REC_FIELD(dgid),
 203           .offset_words = 2,
 204           .offset_bits  = 0,
 205           .size_bits    = 128 },
 206         { PATH_REC_FIELD(sgid),
 207           .offset_words = 6,
 208           .offset_bits  = 0,
 209           .size_bits    = 128 },
 210         { PATH_REC_FIELD(ib.dlid),
 211           .offset_words = 10,
 212           .offset_bits  = 0,
 213           .size_bits    = 16 },
 214         { PATH_REC_FIELD(ib.slid),
 215           .offset_words = 10,
 216           .offset_bits  = 16,
 217           .size_bits    = 16 },
 218         { PATH_REC_FIELD(ib.raw_traffic),
 219           .offset_words = 11,
 220           .offset_bits  = 0,
 221           .size_bits    = 1 },
 222         { RESERVED,
 223           .offset_words = 11,
 224           .offset_bits  = 1,
 225           .size_bits    = 3 },
 226         { PATH_REC_FIELD(flow_label),
 227           .offset_words = 11,
 228           .offset_bits  = 4,
 229           .size_bits    = 20 },
 230         { PATH_REC_FIELD(hop_limit),
 231           .offset_words = 11,
 232           .offset_bits  = 24,
 233           .size_bits    = 8 },
 234         { PATH_REC_FIELD(traffic_class),
 235           .offset_words = 12,
 236           .offset_bits  = 0,
 237           .size_bits    = 8 },
 238         { PATH_REC_FIELD(reversible),
 239           .offset_words = 12,
 240           .offset_bits  = 8,
 241           .size_bits    = 1 },
 242         { PATH_REC_FIELD(numb_path),
 243           .offset_words = 12,
 244           .offset_bits  = 9,
 245           .size_bits    = 7 },
 246         { PATH_REC_FIELD(pkey),
 247           .offset_words = 12,
 248           .offset_bits  = 16,
 249           .size_bits    = 16 },
 250         { PATH_REC_FIELD(qos_class),
 251           .offset_words = 13,
 252           .offset_bits  = 0,
 253           .size_bits    = 12 },
 254         { PATH_REC_FIELD(sl),
 255           .offset_words = 13,
 256           .offset_bits  = 12,
 257           .size_bits    = 4 },
 258         { PATH_REC_FIELD(mtu_selector),
 259           .offset_words = 13,
 260           .offset_bits  = 16,
 261           .size_bits    = 2 },
 262         { PATH_REC_FIELD(mtu),
 263           .offset_words = 13,
 264           .offset_bits  = 18,
 265           .size_bits    = 6 },
 266         { PATH_REC_FIELD(rate_selector),
 267           .offset_words = 13,
 268           .offset_bits  = 24,
 269           .size_bits    = 2 },
 270         { PATH_REC_FIELD(rate),
 271           .offset_words = 13,
 272           .offset_bits  = 26,
 273           .size_bits    = 6 },
 274         { PATH_REC_FIELD(packet_life_time_selector),
 275           .offset_words = 14,
 276           .offset_bits  = 0,
 277           .size_bits    = 2 },
 278         { PATH_REC_FIELD(packet_life_time),
 279           .offset_words = 14,
 280           .offset_bits  = 2,
 281           .size_bits    = 6 },
 282         { PATH_REC_FIELD(preference),
 283           .offset_words = 14,
 284           .offset_bits  = 8,
 285           .size_bits    = 8 },
 286         { RESERVED,
 287           .offset_words = 14,
 288           .offset_bits  = 16,
 289           .size_bits    = 48 },
 290 };
 291
 292 #define OPA_PATH_REC_FIELD(field) \
 293         .struct_offset_bytes = \
 294                 offsetof(struct sa_path_rec, field), \
 295         .struct_size_bytes   = \
 296                 sizeof((struct sa_path_rec *)0)->field, \
 297         .field_name          = "sa_path_rec:" #field
 298
 299 static const struct ib_field opa_path_rec_table[] = {
 300         { OPA_PATH_REC_FIELD(service_id),
 301           .offset_words = 0,
 302           .offset_bits  = 0,
 303           .size_bits    = 64 },
 304         { OPA_PATH_REC_FIELD(dgid),
 305           .offset_words = 2,
 306           .offset_bits  = 0,
 307           .size_bits    = 128 },
 308         { OPA_PATH_REC_FIELD(sgid),
 309           .offset_words = 6,
 310           .offset_bits  = 0,
 311           .size_bits    = 128 },
 312         { OPA_PATH_REC_FIELD(opa.dlid),
 313           .offset_words = 10,
 314           .offset_bits  = 0,
 315           .size_bits    = 32 },
 316         { OPA_PATH_REC_FIELD(opa.slid),
 317           .offset_words = 11,
 318           .offset_bits  = 0,
 319           .size_bits    = 32 },
 320         { OPA_PATH_REC_FIELD(opa.raw_traffic),
 321           .offset_words = 12,
 322           .offset_bits  = 0,
 323           .size_bits    = 1 },
 324         { RESERVED,
 325           .offset_words = 12,
 326           .offset_bits  = 1,
 327           .size_bits    = 3 },
 328         { OPA_PATH_REC_FIELD(flow_label),
 329           .offset_words = 12,
 330           .offset_bits  = 4,
 331           .size_bits    = 20 },
 332         { OPA_PATH_REC_FIELD(hop_limit),
 333           .offset_words = 12,
 334           .offset_bits  = 24,
 335           .size_bits    = 8 },
 336         { OPA_PATH_REC_FIELD(traffic_class),
 337           .offset_words = 13,
 338           .offset_bits  = 0,
 339           .size_bits    = 8 },
 340         { OPA_PATH_REC_FIELD(reversible),
 341           .offset_words = 13,
 342           .offset_bits  = 8,
 343           .size_bits    = 1 },
 344         { OPA_PATH_REC_FIELD(numb_path),
 345           .offset_words = 13,
 346           .offset_bits  = 9,
 347           .size_bits    = 7 },
 348         { OPA_PATH_REC_FIELD(pkey),
 349           .offset_words = 13,
 350           .offset_bits  = 16,
 351           .size_bits    = 16 },
 352         { OPA_PATH_REC_FIELD(opa.l2_8B),
 353           .offset_words = 14,
 354           .offset_bits  = 0,
 355           .size_bits    = 1 },
 356         { OPA_PATH_REC_FIELD(opa.l2_10B),
 357           .offset_words = 14,
 358           .offset_bits  = 1,
 359           .size_bits    = 1 },
 360         { OPA_PATH_REC_FIELD(opa.l2_9B),
 361           .offset_words = 14,
 362           .offset_bits  = 2,
 363           .size_bits    = 1 },
 364         { OPA_PATH_REC_FIELD(opa.l2_16B),
 365           .offset_words = 14,
 366           .offset_bits  = 3,
 367           .size_bits    = 1 },
 368         { RESERVED,
 369           .offset_words = 14,
 370           .offset_bits  = 4,
 371           .size_bits    = 2 },
 372         { OPA_PATH_REC_FIELD(opa.qos_type),
 373           .offset_words = 14,
 374           .offset_bits  = 6,
 375           .size_bits    = 2 },
 376         { OPA_PATH_REC_FIELD(opa.qos_priority),
 377           .offset_words = 14,
 378           .offset_bits  = 8,
 379           .size_bits    = 8 },
 380         { RESERVED,
 381           .offset_words = 14,
 382           .offset_bits  = 16,
 383           .size_bits    = 3 },
 384         { OPA_PATH_REC_FIELD(sl),
 385           .offset_words = 14,
 386           .offset_bits  = 19,
 387           .size_bits    = 5 },
 388         { RESERVED,
 389           .offset_words = 14,
 390           .offset_bits  = 24,
 391           .size_bits    = 8 },
 392         { OPA_PATH_REC_FIELD(mtu_selector),
 393           .offset_words = 15,
 394           .offset_bits  = 0,
 395           .size_bits    = 2 },
 396         { OPA_PATH_REC_FIELD(mtu),
 397           .offset_words = 15,
 398           .offset_bits  = 2,
 399           .size_bits    = 6 },
 400         { OPA_PATH_REC_FIELD(rate_selector),
 401           .offset_words = 15,
 402           .offset_bits  = 8,
 403           .size_bits    = 2 },
 404         { OPA_PATH_REC_FIELD(rate),
 405           .offset_words = 15,
 406           .offset_bits  = 10,
 407           .size_bits    = 6 },
 408         { OPA_PATH_REC_FIELD(packet_life_time_selector),
 409           .offset_words = 15,
 410           .offset_bits  = 16,
 411           .size_bits    = 2 },
 412         { OPA_PATH_REC_FIELD(packet_life_time),
 413           .offset_words = 15,
 414           .offset_bits  = 18,
 415           .size_bits    = 6 },
 416         { OPA_PATH_REC_FIELD(preference),
 417           .offset_words = 15,
 418           .offset_bits  = 24,
 419           .size_bits    = 8 },
 420 };
 421
 422 #define MCMEMBER_REC_FIELD(field) \
 423         .struct_offset_bytes = offsetof(struct ib_sa_mcmember_rec, field),      \
 424         .struct_size_bytes   = sizeof ((struct ib_sa_mcmember_rec *) 0)->field, \
 425         .field_name          = "sa_mcmember_rec:" #field
 426
 427 static const struct ib_field mcmember_rec_table[] = {
 428         { MCMEMBER_REC_FIELD(mgid),
 429           .offset_words = 0,
 430           .offset_bits  = 0,
 431           .size_bits    = 128 },
 432         { MCMEMBER_REC_FIELD(port_gid),
 433           .offset_words = 4,
 434           .offset_bits  = 0,
 435           .size_bits    = 128 },
 436         { MCMEMBER_REC_FIELD(qkey),
 437           .offset_words = 8,
 438           .offset_bits  = 0,
 439           .size_bits    = 32 },
 440         { MCMEMBER_REC_FIELD(mlid),
 441           .offset_words = 9,
 442           .offset_bits  = 0,
 443           .size_bits    = 16 },
 444         { MCMEMBER_REC_FIELD(mtu_selector),
 445           .offset_words = 9,
 446           .offset_bits  = 16,
 447           .size_bits    = 2 },
 448         { MCMEMBER_REC_FIELD(mtu),
 449           .offset_words = 9,
 450           .offset_bits  = 18,
 451           .size_bits    = 6 },
 452         { MCMEMBER_REC_FIELD(traffic_class),
 453           .offset_words = 9,
 454           .offset_bits  = 24,
 455           .size_bits    = 8 },
 456         { MCMEMBER_REC_FIELD(pkey),
 457           .offset_words = 10,
 458           .offset_bits  = 0,
 459           .size_bits    = 16 },
 460         { MCMEMBER_REC_FIELD(rate_selector),
 461           .offset_words = 10,
 462           .offset_bits  = 16,
 463           .size_bits    = 2 },
 464         { MCMEMBER_REC_FIELD(rate),
 465           .offset_words = 10,
 466           .offset_bits  = 18,
 467           .size_bits    = 6 },
 468         { MCMEMBER_REC_FIELD(packet_life_time_selector),
 469           .offset_words = 10,
 470           .offset_bits  = 24,
 471           .size_bits    = 2 },
 472         { MCMEMBER_REC_FIELD(packet_life_time),
 473           .offset_words = 10,
 474           .offset_bits  = 26,
 475           .size_bits    = 6 },
 476         { MCMEMBER_REC_FIELD(sl),
 477           .offset_words = 11,
 478           .offset_bits  = 0,
 479           .size_bits    = 4 },
 480         { MCMEMBER_REC_FIELD(flow_label),
 481           .offset_words = 11,
 482           .offset_bits  = 4,
 483           .size_bits    = 20 },
 484         { MCMEMBER_REC_FIELD(hop_limit),
 485           .offset_words = 11,
 486           .offset_bits  = 24,
 487           .size_bits    = 8 },
 488         { MCMEMBER_REC_FIELD(scope),
 489           .offset_words = 12,
 490           .offset_bits  = 0,
 491           .size_bits    = 4 },
 492         { MCMEMBER_REC_FIELD(join_state),
 493           .offset_words = 12,
 494           .offset_bits  = 4,
 495           .size_bits    = 4 },
 496         { MCMEMBER_REC_FIELD(proxy_join),
 497           .offset_words = 12,
 498           .offset_bits  = 8,
 499           .size_bits    = 1 },
 500         { RESERVED,
 501           .offset_words = 12,
 502           .offset_bits  = 9,
 503           .size_bits    = 23 },
 504 };
 505
 506 #define SERVICE_REC_FIELD(field) \
 507         .struct_offset_bytes = offsetof(struct ib_sa_service_rec, field),       \
 508         .struct_size_bytes   = sizeof ((struct ib_sa_service_rec *) 0)->field,  \
 509         .field_name          = "sa_service_rec:" #field
 510
 511 static const struct ib_field service_rec_table[] = {
 512         { SERVICE_REC_FIELD(id),
 513           .offset_words = 0,
 514           .offset_bits  = 0,
 515           .size_bits    = 64 },
 516         { SERVICE_REC_FIELD(gid),
 517           .offset_words = 2,
 518           .offset_bits  = 0,
 519           .size_bits    = 128 },
 520         { SERVICE_REC_FIELD(pkey),
 521           .offset_words = 6,
 522           .offset_bits  = 0,
 523           .size_bits    = 16 },
 524         { SERVICE_REC_FIELD(lease),
 525           .offset_words = 7,
 526           .offset_bits  = 0,
 527           .size_bits    = 32 },
 528         { SERVICE_REC_FIELD(key),
 529           .offset_words = 8,
 530           .offset_bits  = 0,
 531           .size_bits    = 128 },
 532         { SERVICE_REC_FIELD(name),
 533           .offset_words = 12,
 534           .offset_bits  = 0,
 535           .size_bits    = 64*8 },
 536         { SERVICE_REC_FIELD(data8),
 537           .offset_words = 28,
 538           .offset_bits  = 0,
 539           .size_bits    = 16*8 },
 540         { SERVICE_REC_FIELD(data16),
 541           .offset_words = 32,
 542           .offset_bits  = 0,
 543           .size_bits    = 8*16 },
 544         { SERVICE_REC_FIELD(data32),
 545           .offset_words = 36,
 546           .offset_bits  = 0,
 547           .size_bits    = 4*32 },
 548         { SERVICE_REC_FIELD(data64),
 549           .offset_words = 40,
 550           .offset_bits  = 0,
 551           .size_bits    = 2*64 },
 552 };
 553
 554 #define CLASSPORTINFO_REC_FIELD(field) \
 555         .struct_offset_bytes = offsetof(struct ib_class_port_info, field),      \
 556         .struct_size_bytes   = sizeof((struct ib_class_port_info *)0)->field,   \
 557         .field_name          = "ib_class_port_info:" #field
 558
 559 static const struct ib_field ib_classport_info_rec_table[] = {
 560         { CLASSPORTINFO_REC_FIELD(base_version),
 561           .offset_words = 0,
 562           .offset_bits  = 0,
 563           .size_bits    = 8 },
 564         { CLASSPORTINFO_REC_FIELD(class_version),
 565           .offset_words = 0,
 566           .offset_bits  = 8,
 567           .size_bits    = 8 },
 568         { CLASSPORTINFO_REC_FIELD(capability_mask),
 569           .offset_words = 0,
 570           .offset_bits  = 16,
 571           .size_bits    = 16 },
 572         { CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
 573           .offset_words = 1,
 574           .offset_bits  = 0,
 575           .size_bits    = 32 },
 576         { CLASSPORTINFO_REC_FIELD(redirect_gid),
 577           .offset_words = 2,
 578           .offset_bits  = 0,
 579           .size_bits    = 128 },
 580         { CLASSPORTINFO_REC_FIELD(redirect_tcslfl),
 581           .offset_words = 6,
 582           .offset_bits  = 0,
 583           .size_bits    = 32 },
 584         { CLASSPORTINFO_REC_FIELD(redirect_lid),
 585           .offset_words = 7,
 586           .offset_bits  = 0,
 587           .size_bits    = 16 },
 588         { CLASSPORTINFO_REC_FIELD(redirect_pkey),
 589           .offset_words = 7,
 590           .offset_bits  = 16,
 591           .size_bits    = 16 },
 592
 593         { CLASSPORTINFO_REC_FIELD(redirect_qp),
 594           .offset_words = 8,
 595           .offset_bits  = 0,
 596           .size_bits    = 32 },
 597         { CLASSPORTINFO_REC_FIELD(redirect_qkey),
 598           .offset_words = 9,
 599           .offset_bits  = 0,
 600           .size_bits    = 32 },
 601
 602         { CLASSPORTINFO_REC_FIELD(trap_gid),
 603           .offset_words = 10,
 604           .offset_bits  = 0,
 605           .size_bits    = 128 },
 606         { CLASSPORTINFO_REC_FIELD(trap_tcslfl),
 607           .offset_words = 14,
 608           .offset_bits  = 0,
 609           .size_bits    = 32 },
 610
 611         { CLASSPORTINFO_REC_FIELD(trap_lid),
 612           .offset_words = 15,
 613           .offset_bits  = 0,
 614           .size_bits    = 16 },
 615         { CLASSPORTINFO_REC_FIELD(trap_pkey),
 616           .offset_words = 15,
 617           .offset_bits  = 16,
 618           .size_bits    = 16 },
 619
 620         { CLASSPORTINFO_REC_FIELD(trap_hlqp),
 621           .offset_words = 16,
 622           .offset_bits  = 0,
 623           .size_bits    = 32 },
 624         { CLASSPORTINFO_REC_FIELD(trap_qkey),
 625           .offset_words = 17,
 626           .offset_bits  = 0,
 627           .size_bits    = 32 },
 628 };
 629
 630 #define OPA_CLASSPORTINFO_REC_FIELD(field) \
 631         .struct_offset_bytes =\
 632                 offsetof(struct opa_class_port_info, field),    \
 633         .struct_size_bytes   = \
 634                 sizeof((struct opa_class_port_info *)0)->field, \
 635         .field_name          = "opa_class_port_info:" #field
 636
 637 static const struct ib_field opa_classport_info_rec_table[] = {
 638         { OPA_CLASSPORTINFO_REC_FIELD(base_version),
 639           .offset_words = 0,
 640           .offset_bits  = 0,
 641           .size_bits    = 8 },
 642         { OPA_CLASSPORTINFO_REC_FIELD(class_version),
 643           .offset_words = 0,
 644           .offset_bits  = 8,
 645           .size_bits    = 8 },
 646         { OPA_CLASSPORTINFO_REC_FIELD(cap_mask),
 647           .offset_words = 0,
 648           .offset_bits  = 16,
 649           .size_bits    = 16 },
 650         { OPA_CLASSPORTINFO_REC_FIELD(cap_mask2_resp_time),
 651           .offset_words = 1,
 652           .offset_bits  = 0,
 653           .size_bits    = 32 },
 654         { OPA_CLASSPORTINFO_REC_FIELD(redirect_gid),
 655           .offset_words = 2,
 656           .offset_bits  = 0,
 657           .size_bits    = 128 },
 658         { OPA_CLASSPORTINFO_REC_FIELD(redirect_tc_fl),
 659           .offset_words = 6,
 660           .offset_bits  = 0,
 661           .size_bits    = 32 },
 662         { OPA_CLASSPORTINFO_REC_FIELD(redirect_lid),
 663           .offset_words = 7,
 664           .offset_bits  = 0,
 665           .size_bits    = 32 },
 666         { OPA_CLASSPORTINFO_REC_FIELD(redirect_sl_qp),
 667           .offset_words = 8,
 668           .offset_bits  = 0,
 669           .size_bits    = 32 },
 670         { OPA_CLASSPORTINFO_REC_FIELD(redirect_qkey),
 671           .offset_words = 9,
 672           .offset_bits  = 0,
 673           .size_bits    = 32 },
 674         { OPA_CLASSPORTINFO_REC_FIELD(trap_gid),
 675           .offset_words = 10,
 676           .offset_bits  = 0,
 677           .size_bits    = 128 },
 678         { OPA_CLASSPORTINFO_REC_FIELD(trap_tc_fl),
 679           .offset_words = 14,
 680           .offset_bits  = 0,
 681           .size_bits    = 32 },
 682         { OPA_CLASSPORTINFO_REC_FIELD(trap_lid),
 683           .offset_words = 15,
 684           .offset_bits  = 0,
 685           .size_bits    = 32 },
 686         { OPA_CLASSPORTINFO_REC_FIELD(trap_hl_qp),
 687           .offset_words = 16,
 688           .offset_bits  = 0,
 689           .size_bits    = 32 },
 690         { OPA_CLASSPORTINFO_REC_FIELD(trap_qkey),
 691           .offset_words = 17,
 692           .offset_bits  = 0,
 693           .size_bits    = 32 },
 694         { OPA_CLASSPORTINFO_REC_FIELD(trap_pkey),
 695           .offset_words = 18,
 696           .offset_bits  = 0,
 697           .size_bits    = 16 },
 698         { OPA_CLASSPORTINFO_REC_FIELD(redirect_pkey),
 699           .offset_words = 18,
 700           .offset_bits  = 16,
 701           .size_bits    = 16 },
 702         { OPA_CLASSPORTINFO_REC_FIELD(trap_sl_rsvd),
 703           .offset_words = 19,
 704           .offset_bits  = 0,
 705           .size_bits    = 8 },
 706         { RESERVED,
 707           .offset_words = 19,
 708           .offset_bits  = 8,
 709           .size_bits    = 24 },
 710 };
 711
 712 #define GUIDINFO_REC_FIELD(field) \
 713         .struct_offset_bytes = offsetof(struct ib_sa_guidinfo_rec, field),      \
 714         .struct_size_bytes   = sizeof((struct ib_sa_guidinfo_rec *) 0)->field,  \
 715         .field_name          = "sa_guidinfo_rec:" #field
 716
 717 static const struct ib_field guidinfo_rec_table[] = {
 718         { GUIDINFO_REC_FIELD(lid),
 719           .offset_words = 0,
 720           .offset_bits  = 0,
 721           .size_bits    = 16 },
 722         { GUIDINFO_REC_FIELD(block_num),
 723           .offset_words = 0,
 724           .offset_bits  = 16,
 725           .size_bits    = 8 },
 726         { GUIDINFO_REC_FIELD(res1),
 727           .offset_words = 0,
 728           .offset_bits  = 24,
 729           .size_bits    = 8 },
 730         { GUIDINFO_REC_FIELD(res2),
 731           .offset_words = 1,
 732           .offset_bits  = 0,
 733           .size_bits    = 32 },
 734         { GUIDINFO_REC_FIELD(guid_info_list),
 735           .offset_words = 2,
 736           .offset_bits  = 0,
 737           .size_bits    = 512 },
 738 };
 739
 740 static inline void ib_sa_disable_local_svc(struct ib_sa_query *query)
 741 {
 742         query->flags &= ~IB_SA_ENABLE_LOCAL_SERVICE;
 743 }
 744
 745 static inline int ib_sa_query_cancelled(struct ib_sa_query *query)
 746 {
 747         return (query->flags & IB_SA_CANCEL);
 748 }
 749
 750 static void ib_nl_set_path_rec_attrs(struct sk_buff *skb,
 751                                      struct ib_sa_query *query)
 752 {
 753         struct sa_path_rec *sa_rec = query->mad_buf->context[1];
 754         struct ib_sa_mad *mad = query->mad_buf->mad;
 755         ib_sa_comp_mask comp_mask = mad->sa_hdr.comp_mask;
 756         u16 val16;
 757         u64 val64;
 758         struct rdma_ls_resolve_header *header;
 759
 760         query->mad_buf->context[1] = NULL;
 761
 762         /* Construct the family header first */
 763         header = skb_put(skb, NLMSG_ALIGN(sizeof(*header)));
 764         memcpy(header->device_name, query->port->agent->device->name,
 765                LS_DEVICE_NAME_MAX);
 766         header->port_num = query->port->port_num;
 767
 768         if ((comp_mask & IB_SA_PATH_REC_REVERSIBLE) &&
 769             sa_rec->reversible != 0)
 770                 query->path_use = LS_RESOLVE_PATH_USE_GMP;
 771         else
 772                 query->path_use = LS_RESOLVE_PATH_USE_UNIDIRECTIONAL;
 773         header->path_use = query->path_use;
 774
 775         /* Now build the attributes */
 776         if (comp_mask & IB_SA_PATH_REC_SERVICE_ID) {
 777                 val64 = be64_to_cpu(sa_rec->service_id);
 778                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SERVICE_ID,
 779                         sizeof(val64), &val64);
 780         }
 781         if (comp_mask & IB_SA_PATH_REC_DGID)
 782                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_DGID,
 783                         sizeof(sa_rec->dgid), &sa_rec->dgid);
 784         if (comp_mask & IB_SA_PATH_REC_SGID)
 785                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_SGID,
 786                         sizeof(sa_rec->sgid), &sa_rec->sgid);
 787         if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
 788                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_TCLASS,
 789                         sizeof(sa_rec->traffic_class), &sa_rec->traffic_class);
 790
 791         if (comp_mask & IB_SA_PATH_REC_PKEY) {
 792                 val16 = be16_to_cpu(sa_rec->pkey);
 793                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_PKEY,
 794                         sizeof(val16), &val16);
 795         }
 796         if (comp_mask & IB_SA_PATH_REC_QOS_CLASS) {
 797                 val16 = be16_to_cpu(sa_rec->qos_class);
 798                 nla_put(skb, RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_QOS_CLASS,
 799                         sizeof(val16), &val16);
 800         }
 801 }
 802
 803 static int ib_nl_get_path_rec_attrs_len(ib_sa_comp_mask comp_mask)
 804 {
 805         int len = 0;
 806
 807         if (comp_mask & IB_SA_PATH_REC_SERVICE_ID)
 808                 len += nla_total_size(sizeof(u64));
 809         if (comp_mask & IB_SA_PATH_REC_DGID)
 810                 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
 811         if (comp_mask & IB_SA_PATH_REC_SGID)
 812                 len += nla_total_size(sizeof(struct rdma_nla_ls_gid));
 813         if (comp_mask & IB_SA_PATH_REC_TRAFFIC_CLASS)
 814                 len += nla_total_size(sizeof(u8));
 815         if (comp_mask & IB_SA_PATH_REC_PKEY)
 816                 len += nla_total_size(sizeof(u16));
 817         if (comp_mask & IB_SA_PATH_REC_QOS_CLASS)
 818                 len += nla_total_size(sizeof(u16));
 819
 820         /*
 821          * Make sure that at least some of the required comp_mask bits are
 822          * set.
 823          */
 824         if (WARN_ON(len == 0))
 825                 return len;
 826
 827         /* Add the family header */
 828         len += NLMSG_ALIGN(sizeof(struct rdma_ls_resolve_header));
 829
 830         return len;
 831 }
 832
 833 static int ib_nl_send_msg(struct ib_sa_query *query, gfp_t gfp_mask)
 834 {
 835         struct sk_buff *skb = NULL;
 836         struct nlmsghdr *nlh;
 837         void *data;
 838         int ret = 0;
 839         struct ib_sa_mad *mad;
 840         int len;
 841
 842         mad = query->mad_buf->mad;
 843         len = ib_nl_get_path_rec_attrs_len(mad->sa_hdr.comp_mask);
 844         if (len <= 0)
 845                 return -EMSGSIZE;
 846
 847         skb = nlmsg_new(len, gfp_mask);
 848         if (!skb)
 849                 return -ENOMEM;
 850
 851         /* Put nlmsg header only for now */
 852         data = ibnl_put_msg(skb, &nlh, query->seq, 0, RDMA_NL_LS,
 853                             RDMA_NL_LS_OP_RESOLVE, NLM_F_REQUEST);
 854         if (!data) {
 855                 nlmsg_free(skb);
 856                 return -EMSGSIZE;
 857         }
 858
 859         /* Add attributes */
 860         ib_nl_set_path_rec_attrs(skb, query);
 861
 862         /* Repair the nlmsg header length */
 863         nlmsg_end(skb, nlh);
 864
 865         ret = rdma_nl_multicast(skb, RDMA_NL_GROUP_LS, gfp_mask);
 866         if (!ret)
 867                 ret = len;
 868         else
 869                 ret = 0;
 870
 871         return ret;
 872 }
 873
 874 static int ib_nl_make_request(struct ib_sa_query *query, gfp_t gfp_mask)
 875 {
 876         unsigned long flags;
 877         unsigned long delay;
 878         int ret;
 879
 880         INIT_LIST_HEAD(&query->list);
 881         query->seq = (u32)atomic_inc_return(&ib_nl_sa_request_seq);
 882
 883         /* Put the request on the list first.*/
 884         spin_lock_irqsave(&ib_nl_request_lock, flags);
 885         delay = msecs_to_jiffies(sa_local_svc_timeout_ms);
 886         query->timeout = delay + jiffies;
 887         list_add_tail(&query->list, &ib_nl_request_list);
 888         /* Start the timeout if this is the only request */
 889         if (ib_nl_request_list.next == &query->list)
 890                 queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
 891         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 892
 893         ret = ib_nl_send_msg(query, gfp_mask);
 894         if (ret <= 0) {
 895                 ret = -EIO;
 896                 /* Remove the request */
 897                 spin_lock_irqsave(&ib_nl_request_lock, flags);
 898                 list_del(&query->list);
 899                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 900         } else {
 901                 ret = 0;
 902         }
 903
 904         return ret;
 905 }
 906
 907 static int ib_nl_cancel_request(struct ib_sa_query *query)
 908 {
 909         unsigned long flags;
 910         struct ib_sa_query *wait_query;
 911         int found = 0;
 912
 913         spin_lock_irqsave(&ib_nl_request_lock, flags);
 914         list_for_each_entry(wait_query, &ib_nl_request_list, list) {
 915                 /* Let the timeout to take care of the callback */
 916                 if (query == wait_query) {
 917                         query->flags |= IB_SA_CANCEL;
 918                         query->timeout = jiffies;
 919                         list_move(&query->list, &ib_nl_request_list);
 920                         found = 1;
 921                         mod_delayed_work(ib_nl_wq, &ib_nl_timed_work, 1);
 922                         break;
 923                 }
 924         }
 925         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
 926
 927         return found;
 928 }
 929
 930 static void send_handler(struct ib_mad_agent *agent,
 931                          struct ib_mad_send_wc *mad_send_wc);
 932
 933 static void ib_nl_process_good_resolve_rsp(struct ib_sa_query *query,
 934                                            const struct nlmsghdr *nlh)
 935 {
 936         struct ib_mad_send_wc mad_send_wc;
 937         struct ib_sa_mad *mad = NULL;
 938         const struct nlattr *head, *curr;
 939         struct ib_path_rec_data  *rec;
 940         int len, rem;
 941         u32 mask = 0;
 942         int status = -EIO;
 943
 944         if (query->callback) {
 945                 head = (const struct nlattr *) nlmsg_data(nlh);
 946                 len = nlmsg_len(nlh);
 947                 switch (query->path_use) {
 948                 case LS_RESOLVE_PATH_USE_UNIDIRECTIONAL:
 949                         mask = IB_PATH_PRIMARY | IB_PATH_OUTBOUND;
 950                         break;
 951
 952                 case LS_RESOLVE_PATH_USE_ALL:
 953                 case LS_RESOLVE_PATH_USE_GMP:
 954                 default:
 955                         mask = IB_PATH_PRIMARY | IB_PATH_GMP |
 956                                 IB_PATH_BIDIRECTIONAL;
 957                         break;
 958                 }
 959                 nla_for_each_attr(curr, head, len, rem) {
 960                         if (curr->nla_type == LS_NLA_TYPE_PATH_RECORD) {
 961                                 rec = nla_data(curr);
 962                                 /*
 963                                  * Get the first one. In the future, we may
 964                                  * need to get up to 6 pathrecords.
 965                                  */
 966                                 if ((rec->flags & mask) == mask) {
 967                                         mad = query->mad_buf->mad;
 968                                         mad->mad_hdr.method |=
 969                                                 IB_MGMT_METHOD_RESP;
 970                                         memcpy(mad->data, rec->path_rec,
 971                                                sizeof(rec->path_rec));
 972                                         status = 0;
 973                                         break;
 974                                 }
 975                         }
 976                 }
 977                 query->callback(query, status, mad);
 978         }
 979
 980         mad_send_wc.send_buf = query->mad_buf;
 981         mad_send_wc.status = IB_WC_SUCCESS;
 982         send_handler(query->mad_buf->mad_agent, &mad_send_wc);
 983 }
 984
 985 static void ib_nl_request_timeout(struct work_struct *work)
 986 {
 987         unsigned long flags;
 988         struct ib_sa_query *query;
 989         unsigned long delay;
 990         struct ib_mad_send_wc mad_send_wc;
 991         int ret;
 992
 993         spin_lock_irqsave(&ib_nl_request_lock, flags);
 994         while (!list_empty(&ib_nl_request_list)) {
 995                 query = list_entry(ib_nl_request_list.next,
 996                                    struct ib_sa_query, list);
 997
 998                 if (time_after(query->timeout, jiffies)) {
 999                         delay = query->timeout - jiffies;
1000                         if ((long)delay <= 0)
1001                                 delay = 1;
1002                         queue_delayed_work(ib_nl_wq, &ib_nl_timed_work, delay);
1003                         break;
1004                 }
1005
1006                 list_del(&query->list);
1007                 ib_sa_disable_local_svc(query);
1008                 /* Hold the lock to protect against query cancellation */
1009                 if (ib_sa_query_cancelled(query))
1010                         ret = -1;
1011                 else
1012                         ret = ib_post_send_mad(query->mad_buf, NULL);
1013                 if (ret) {
1014                         mad_send_wc.send_buf = query->mad_buf;
1015                         mad_send_wc.status = IB_WC_WR_FLUSH_ERR;
1016                         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1017                         send_handler(query->port->agent, &mad_send_wc);
1018                         spin_lock_irqsave(&ib_nl_request_lock, flags);
1019                 }
1020         }
1021         spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1022 }
1023
1024 int ib_nl_handle_set_timeout(struct sk_buff *skb,
1025                              struct nlmsghdr *nlh,
1026                              struct netlink_ext_ack *extack)
1027 {
1028         int timeout, delta, abs_delta;
1029         const struct nlattr *attr;
1030         unsigned long flags;
1031         struct ib_sa_query *query;
1032         long delay = 0;
1033         struct nlattr *tb[LS_NLA_TYPE_MAX];
1034         int ret;
1035
1036         if (!(nlh->nlmsg_flags & NLM_F_REQUEST) ||
1037             !(NETLINK_CB(skb).sk))
1038                 return -EPERM;
1039
1040         ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1041                         nlmsg_len(nlh), ib_nl_policy, NULL);
1042         attr = (const struct nlattr *)tb[LS_NLA_TYPE_TIMEOUT];
1043         if (ret || !attr)
1044                 goto settimeout_out;
1045
1046         timeout = *(int *) nla_data(attr);
1047         if (timeout < IB_SA_LOCAL_SVC_TIMEOUT_MIN)
1048                 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MIN;
1049         if (timeout > IB_SA_LOCAL_SVC_TIMEOUT_MAX)
1050                 timeout = IB_SA_LOCAL_SVC_TIMEOUT_MAX;
1051
1052         delta = timeout - sa_local_svc_timeout_ms;
1053         if (delta < 0)
1054                 abs_delta = -delta;
1055         else
1056                 abs_delta = delta;
1057
1058         if (delta != 0) {
1059                 spin_lock_irqsave(&ib_nl_request_lock, flags);
1060                 sa_local_svc_timeout_ms = timeout;
1061                 list_for_each_entry(query, &ib_nl_request_list, list) {
1062                         if (delta < 0 && abs_delta > query->timeout)
1063                                 query->timeout = 0;
1064                         else
1065                                 query->timeout += delta;
1066
1067                         /* Get the new delay from the first entry */
1068                         if (!delay) {
1069                                 delay = query->timeout - jiffies;
1070                                 if (delay <= 0)
1071                                         delay = 1;
1072                         }
1073                 }
1074                 if (delay)
1075                         mod_delayed_work(ib_nl_wq, &ib_nl_timed_work,
1076                                          (unsigned long)delay);
1077                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1078         }
1079
1080 settimeout_out:
1081         return 0;
1082 }
1083
1084 static inline int ib_nl_is_good_resolve_resp(const struct nlmsghdr *nlh)
1085 {
1086         struct nlattr *tb[LS_NLA_TYPE_MAX];
1087         int ret;
1088
1089         if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR)
1090                 return 0;
1091
1092         ret = nla_parse(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh),
1093                         nlmsg_len(nlh), ib_nl_policy, NULL);
1094         if (ret)
1095                 return 0;
1096
1097         return 1;
1098 }
1099
1100 int ib_nl_handle_resolve_resp(struct sk_buff *skb,
1101                               struct nlmsghdr *nlh,
1102                               struct netlink_ext_ack *extack)
1103 {
1104         unsigned long flags;
1105         struct ib_sa_query *query;
1106         struct ib_mad_send_buf *send_buf;
1107         struct ib_mad_send_wc mad_send_wc;
1108         int found = 0;
1109         int ret;
1110
1111         if ((nlh->nlmsg_flags & NLM_F_REQUEST) ||
1112             !(NETLINK_CB(skb).sk))
1113                 return -EPERM;
1114
1115         spin_lock_irqsave(&ib_nl_request_lock, flags);
1116         list_for_each_entry(query, &ib_nl_request_list, list) {
1117                 /*
1118                  * If the query is cancelled, let the timeout routine
1119                  * take care of it.
1120                  */
1121                 if (nlh->nlmsg_seq == query->seq) {
1122                         found = !ib_sa_query_cancelled(query);
1123                         if (found)
1124                                 list_del(&query->list);
1125                         break;
1126                 }
1127         }
1128
1129         if (!found) {
1130                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1131                 goto resp_out;
1132         }
1133
1134         send_buf = query->mad_buf;
1135
1136         if (!ib_nl_is_good_resolve_resp(nlh)) {
1137                 /* if the result is a failure, send out the packet via IB */
1138                 ib_sa_disable_local_svc(query);
1139                 ret = ib_post_send_mad(query->mad_buf, NULL);
1140                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1141                 if (ret) {
1142                         mad_send_wc.send_buf = send_buf;
1143                         mad_send_wc.status = IB_WC_GENERAL_ERR;
1144                         send_handler(query->port->agent, &mad_send_wc);
1145                 }
1146         } else {
1147                 spin_unlock_irqrestore(&ib_nl_request_lock, flags);
1148                 ib_nl_process_good_resolve_rsp(query, nlh);
1149         }
1150
1151 resp_out:
1152         return 0;
1153 }
1154
1155 static void free_sm_ah(struct kref *kref)
1156 {
1157         struct ib_sa_sm_ah *sm_ah = container_of(kref, struct ib_sa_sm_ah, ref);
1158
1159         rdma_destroy_ah(sm_ah->ah);
1160         kfree(sm_ah);
1161 }
1162
1163 void ib_sa_register_client(struct ib_sa_client *client)
1164 {
1165         atomic_set(&client->users, 1);
1166         init_completion(&client->comp);
1167 }
1168 EXPORT_SYMBOL(ib_sa_register_client);
1169
1170 void ib_sa_unregister_client(struct ib_sa_client *client)
1171 {
1172         ib_sa_client_put(client);
1173         wait_for_completion(&client->comp);
1174 }
1175 EXPORT_SYMBOL(ib_sa_unregister_client);
1176
1177 /**
1178  * ib_sa_cancel_query - try to cancel an SA query
1179  * @id:ID of query to cancel
1180  * @query:query pointer to cancel
1181  *
1182  * Try to cancel an SA query.  If the id and query don't match up or
1183  * the query has already completed, nothing is done.  Otherwise the
1184  * query is canceled and will complete with a status of -EINTR.
1185  */
1186 void ib_sa_cancel_query(int id, struct ib_sa_query *query)
1187 {
1188         unsigned long flags;
1189         struct ib_mad_agent *agent;
1190         struct ib_mad_send_buf *mad_buf;
1191
1192         spin_lock_irqsave(&idr_lock, flags);
1193         if (idr_find(&query_idr, id) != query) {
1194                 spin_unlock_irqrestore(&idr_lock, flags);
1195                 return;
1196         }
1197         agent = query->port->agent;
1198         mad_buf = query->mad_buf;
1199         spin_unlock_irqrestore(&idr_lock, flags);
1200
1201         /*
1202          * If the query is still on the netlink request list, schedule
1203          * it to be cancelled by the timeout routine. Otherwise, it has been
1204          * sent to the MAD layer and has to be cancelled from there.
1205          */
1206         if (!ib_nl_cancel_request(query))
1207                 ib_cancel_mad(agent, mad_buf);
1208 }
1209 EXPORT_SYMBOL(ib_sa_cancel_query);
1210
1211 static u8 get_src_path_mask(struct ib_device *device, u8 port_num)
1212 {
1213         struct ib_sa_device *sa_dev;
1214         struct ib_sa_port   *port;
1215         unsigned long flags;
1216         u8 src_path_mask;
1217
1218         sa_dev = ib_get_client_data(device, &sa_client);
1219         if (!sa_dev)
1220                 return 0x7f;
1221
1222         port  = &sa_dev->port[port_num - sa_dev->start_port];
1223         spin_lock_irqsave(&port->ah_lock, flags);
1224         src_path_mask = port->sm_ah ? port->sm_ah->src_path_mask : 0x7f;
1225         spin_unlock_irqrestore(&port->ah_lock, flags);
1226
1227         return src_path_mask;
1228 }
1229
1230 static int roce_resolve_route_from_path(struct sa_path_rec *rec,
1231                                         const struct ib_gid_attr *attr)
1232 {
1233         struct rdma_dev_addr dev_addr = {};
1234         union {
1235                 struct sockaddr_in  _sockaddr_in;
1236                 struct sockaddr_in6 _sockaddr_in6;
1237         } sgid_addr, dgid_addr;
1238         int ret;
1239
1240         if (rec->roce.route_resolved)
1241                 return 0;
1242         if (!attr || !attr->ndev)
1243                 return -EINVAL;
1244
1245         dev_addr.bound_dev_if = attr->ndev->ifindex;
1246         /* TODO: Use net from the ib_gid_attr once it is added to it,
1247          * until than, limit itself to init_net.
1248          */
1249         dev_addr.net = &init_net;
1250
1251         rdma_gid2ip((struct sockaddr *)&sgid_addr, &rec->sgid);
1252         rdma_gid2ip((struct sockaddr *)&dgid_addr, &rec->dgid);
1253
1254         /* validate the route */
1255         ret = rdma_resolve_ip_route((struct sockaddr *)&sgid_addr,
1256                                     (struct sockaddr *)&dgid_addr, &dev_addr);
1257         if (ret)
1258                 return ret;
1259
1260         if ((dev_addr.network == RDMA_NETWORK_IPV4 ||
1261              dev_addr.network == RDMA_NETWORK_IPV6) &&
1262             rec->rec_type != SA_PATH_REC_TYPE_ROCE_V2)
1263                 return -EINVAL;
1264
1265         rec->roce.route_resolved = true;
1266         return 0;
1267 }
1268
1269 static int init_ah_attr_grh_fields(struct ib_device *device, u8 port_num,
1270                                    struct sa_path_rec *rec,
1271                                    struct rdma_ah_attr *ah_attr,
1272                                    const struct ib_gid_attr *gid_attr)
1273 {
1274         enum ib_gid_type type = sa_conv_pathrec_to_gid_type(rec);
1275
1276         if (!gid_attr) {
1277                 gid_attr = rdma_find_gid_by_port(device, &rec->sgid, type,
1278                                                  port_num, NULL);
1279                 if (IS_ERR(gid_attr))
1280                         return PTR_ERR(gid_attr);
1281         } else
1282                 rdma_hold_gid_attr(gid_attr);
1283
1284         rdma_move_grh_sgid_attr(ah_attr, &rec->dgid,
1285                                 be32_to_cpu(rec->flow_label),
1286                                 rec->hop_limit, rec->traffic_class,
1287                                 gid_attr);
1288         return 0;
1289 }
1290
1291 /**
1292  * ib_init_ah_attr_from_path - Initialize address handle attributes based on
1293  *   an SA path record.
1294  * @device: Device associated ah attributes initialization.
1295  * @port_num: Port on the specified device.
1296  * @rec: path record entry to use for ah attributes initialization.
1297  * @ah_attr: address handle attributes to initialization from path record.
1298  * @sgid_attr: SGID attribute to consider during initialization.
1299  *
1300  * When ib_init_ah_attr_from_path() returns success,
1301  * (a) for IB link layer it optionally contains a reference to SGID attribute
1302  * when GRH is present for IB link layer.
1303  * (b) for RoCE link layer it contains a reference to SGID attribute.
1304  * User must invoke rdma_destroy_ah_attr() to release reference to SGID
1305  * attributes which are initialized using ib_init_ah_attr_from_path().
1306  */
1307 int ib_init_ah_attr_from_path(struct ib_device *device, u8 port_num,
1308                               struct sa_path_rec *rec,
1309                               struct rdma_ah_attr *ah_attr,
1310                               const struct ib_gid_attr *gid_attr)
1311 {
1312         int ret = 0;
1313
1314         memset(ah_attr, 0, sizeof(*ah_attr));
1315         ah_attr->type = rdma_ah_find_type(device, port_num);
1316         rdma_ah_set_sl(ah_attr, rec->sl);
1317         rdma_ah_set_port_num(ah_attr, port_num);
1318         rdma_ah_set_static_rate(ah_attr, rec->rate);
1319
1320         if (sa_path_is_roce(rec)) {
1321                 ret = roce_resolve_route_from_path(rec, gid_attr);
1322                 if (ret)
1323                         return ret;
1324
1325                 memcpy(ah_attr->roce.dmac, sa_path_get_dmac(rec), ETH_ALEN);
1326         } else {
1327                 rdma_ah_set_dlid(ah_attr, be32_to_cpu(sa_path_get_dlid(rec)));
1328                 if (sa_path_is_opa(rec) &&
1329                     rdma_ah_get_dlid(ah_attr) == be16_to_cpu(IB_LID_PERMISSIVE))
1330                         rdma_ah_set_make_grd(ah_attr, true);
1331
1332                 rdma_ah_set_path_bits(ah_attr,
1333                                       be32_to_cpu(sa_path_get_slid(rec)) &
1334                                       get_src_path_mask(device, port_num));
1335         }
1336
1337         if (rec->hop_limit > 0 || sa_path_is_roce(rec))
1338                 ret = init_ah_attr_grh_fields(device, port_num,
1339                                               rec, ah_attr, gid_attr);
1340         return ret;
1341 }
1342 EXPORT_SYMBOL(ib_init_ah_attr_from_path);
1343
1344 static int alloc_mad(struct ib_sa_query *query, gfp_t gfp_mask)
1345 {
1346         struct rdma_ah_attr ah_attr;
1347         unsigned long flags;
1348
1349         spin_lock_irqsave(&query->port->ah_lock, flags);
1350         if (!query->port->sm_ah) {
1351                 spin_unlock_irqrestore(&query->port->ah_lock, flags);
1352                 return -EAGAIN;
1353         }
1354         kref_get(&query->port->sm_ah->ref);
1355         query->sm_ah = query->port->sm_ah;
1356         spin_unlock_irqrestore(&query->port->ah_lock, flags);
1357
1358         /*
1359          * Always check if sm_ah has valid dlid assigned,
1360          * before querying for class port info
1361          */
1362         if ((rdma_query_ah(query->sm_ah->ah, &ah_attr) < 0) ||
1363             !rdma_is_valid_unicast_lid(&ah_attr)) {
1364                 kref_put(&query->sm_ah->ref, free_sm_ah);
1365                 return -EAGAIN;
1366         }
1367         query->mad_buf = ib_create_send_mad(query->port->agent, 1,
1368                                             query->sm_ah->pkey_index,
1369                                             0, IB_MGMT_SA_HDR, IB_MGMT_SA_DATA,
1370                                             gfp_mask,
1371                                             ((query->flags & IB_SA_QUERY_OPA) ?
1372                                              OPA_MGMT_BASE_VERSION :
1373                                              IB_MGMT_BASE_VERSION));
1374         if (IS_ERR(query->mad_buf)) {
1375                 kref_put(&query->sm_ah->ref, free_sm_ah);
1376                 return -ENOMEM;
1377         }
1378
1379         query->mad_buf->ah = query->sm_ah->ah;
1380
1381         return 0;
1382 }
1383
1384 static void free_mad(struct ib_sa_query *query)
1385 {
1386         ib_free_send_mad(query->mad_buf);
1387         kref_put(&query->sm_ah->ref, free_sm_ah);
1388 }
1389
1390 static void init_mad(struct ib_sa_query *query, struct ib_mad_agent *agent)
1391 {
1392         struct ib_sa_mad *mad = query->mad_buf->mad;
1393         unsigned long flags;
1394
1395         memset(mad, 0, sizeof *mad);
1396
1397         if (query->flags & IB_SA_QUERY_OPA) {
1398                 mad->mad_hdr.base_version  = OPA_MGMT_BASE_VERSION;
1399                 mad->mad_hdr.class_version = OPA_SA_CLASS_VERSION;
1400         } else {
1401                 mad->mad_hdr.base_version  = IB_MGMT_BASE_VERSION;
1402                 mad->mad_hdr.class_version = IB_SA_CLASS_VERSION;
1403         }
1404         mad->mad_hdr.mgmt_class    = IB_MGMT_CLASS_SUBN_ADM;
1405         spin_lock_irqsave(&tid_lock, flags);
1406         mad->mad_hdr.tid           =
1407                 cpu_to_be64(((u64) agent->hi_tid) << 32 | tid++);
1408         spin_unlock_irqrestore(&tid_lock, flags);
1409 }
1410
1411 static int send_mad(struct ib_sa_query *query, int timeout_ms, gfp_t gfp_mask)
1412 {
1413         bool preload = gfpflags_allow_blocking(gfp_mask);
1414         unsigned long flags;
1415         int ret, id;
1416
1417         if (preload)
1418                 idr_preload(gfp_mask);
1419         spin_lock_irqsave(&idr_lock, flags);
1420
1421         id = idr_alloc(&query_idr, query, 0, 0, GFP_NOWAIT);
1422
1423         spin_unlock_irqrestore(&idr_lock, flags);
1424         if (preload)
1425                 idr_preload_end();
1426         if (id < 0)
1427                 return id;
1428
1429         query->mad_buf->timeout_ms  = timeout_ms;
1430         query->mad_buf->context[0] = query;
1431         query->id = id;
1432
1433         if ((query->flags & IB_SA_ENABLE_LOCAL_SERVICE) &&
1434             (!(query->flags & IB_SA_QUERY_OPA))) {
1435                 if (!rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) {
1436                         if (!ib_nl_make_request(query, gfp_mask))
1437                                 return id;
1438                 }
1439                 ib_sa_disable_local_svc(query);
1440         }
1441
1442         ret = ib_post_send_mad(query->mad_buf, NULL);
1443         if (ret) {
1444                 spin_lock_irqsave(&idr_lock, flags);
1445                 idr_remove(&query_idr, id);
1446                 spin_unlock_irqrestore(&idr_lock, flags);
1447         }
1448
1449         /*
1450          * It's not safe to dereference query any more, because the
1451          * send may already have completed and freed the query in
1452          * another context.
1453          */
1454         return ret ? ret : id;
1455 }
1456
1457 void ib_sa_unpack_path(void *attribute, struct sa_path_rec *rec)
1458 {
1459         ib_unpack(path_rec_table, ARRAY_SIZE(path_rec_table), attribute, rec);
1460 }
1461 EXPORT_SYMBOL(ib_sa_unpack_path);
1462
1463 void ib_sa_pack_path(struct sa_path_rec *rec, void *attribute)
1464 {
1465         ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table), rec, attribute);
1466 }
1467 EXPORT_SYMBOL(ib_sa_pack_path);
1468
1469 static bool ib_sa_opa_pathrecord_support(struct ib_sa_client *client,
1470                                          struct ib_device *device,
1471                                          u8 port_num)
1472 {
1473         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1474         struct ib_sa_port *port;
1475         unsigned long flags;
1476         bool ret = false;
1477
1478         if (!sa_dev)
1479                 return ret;
1480
1481         port = &sa_dev->port[port_num - sa_dev->start_port];
1482         spin_lock_irqsave(&port->classport_lock, flags);
1483         if (!port->classport_info.valid)
1484                 goto ret;
1485
1486         if (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_OPA)
1487                 ret = opa_get_cpi_capmask2(&port->classport_info.data.opa) &
1488                         OPA_CLASS_PORT_INFO_PR_SUPPORT;
1489 ret:
1490         spin_unlock_irqrestore(&port->classport_lock, flags);
1491         return ret;
1492 }
1493
1494 enum opa_pr_supported {
1495         PR_NOT_SUPPORTED,
1496         PR_OPA_SUPPORTED,
1497         PR_IB_SUPPORTED
1498 };
1499
1500 /**
1501  * Check if current PR query can be an OPA query.
1502  * Retuns PR_NOT_SUPPORTED if a path record query is not
1503  * possible, PR_OPA_SUPPORTED if an OPA path record query
1504  * is possible and PR_IB_SUPPORTED if an IB path record
1505  * query is possible.
1506  */
1507 static int opa_pr_query_possible(struct ib_sa_client *client,
1508                                  struct ib_device *device,
1509                                  u8 port_num,
1510                                  struct sa_path_rec *rec)
1511 {
1512         struct ib_port_attr port_attr;
1513
1514         if (ib_query_port(device, port_num, &port_attr))
1515                 return PR_NOT_SUPPORTED;
1516
1517         if (ib_sa_opa_pathrecord_support(client, device, port_num))
1518                 return PR_OPA_SUPPORTED;
1519
1520         if (port_attr.lid >= be16_to_cpu(IB_MULTICAST_LID_BASE))
1521                 return PR_NOT_SUPPORTED;
1522         else
1523                 return PR_IB_SUPPORTED;
1524 }
1525
1526 static void ib_sa_path_rec_callback(struct ib_sa_query *sa_query,
1527                                     int status,
1528                                     struct ib_sa_mad *mad)
1529 {
1530         struct ib_sa_path_query *query =
1531                 container_of(sa_query, struct ib_sa_path_query, sa_query);
1532
1533         if (mad) {
1534                 struct sa_path_rec rec;
1535
1536                 if (sa_query->flags & IB_SA_QUERY_OPA) {
1537                         ib_unpack(opa_path_rec_table,
1538                                   ARRAY_SIZE(opa_path_rec_table),
1539                                   mad->data, &rec);
1540                         rec.rec_type = SA_PATH_REC_TYPE_OPA;
1541                         query->callback(status, &rec, query->context);
1542                 } else {
1543                         ib_unpack(path_rec_table,
1544                                   ARRAY_SIZE(path_rec_table),
1545                                   mad->data, &rec);
1546                         rec.rec_type = SA_PATH_REC_TYPE_IB;
1547                         sa_path_set_dmac_zero(&rec);
1548
1549                         if (query->conv_pr) {
1550                                 struct sa_path_rec opa;
1551
1552                                 memset(&opa, 0, sizeof(struct sa_path_rec));
1553                                 sa_convert_path_ib_to_opa(&opa, &rec);
1554                                 query->callback(status, &opa, query->context);
1555                         } else {
1556                                 query->callback(status, &rec, query->context);
1557                         }
1558                 }
1559         } else
1560                 query->callback(status, NULL, query->context);
1561 }
1562
1563 static void ib_sa_path_rec_release(struct ib_sa_query *sa_query)
1564 {
1565         struct ib_sa_path_query *query =
1566                 container_of(sa_query, struct ib_sa_path_query, sa_query);
1567
1568         kfree(query->conv_pr);
1569         kfree(query);
1570 }
1571
1572 /**
1573  * ib_sa_path_rec_get - Start a Path get query
1574  * @client:SA client
1575  * @device:device to send query on
1576  * @port_num: port number to send query on
1577  * @rec:Path Record to send in query
1578  * @comp_mask:component mask to send in query
1579  * @timeout_ms:time to wait for response
1580  * @gfp_mask:GFP mask to use for internal allocations
1581  * @callback:function called when query completes, times out or is
1582  * canceled
1583  * @context:opaque user context passed to callback
1584  * @sa_query:query context, used to cancel query
1585  *
1586  * Send a Path Record Get query to the SA to look up a path.  The
1587  * callback function will be called when the query completes (or
1588  * fails); status is 0 for a successful response, -EINTR if the query
1589  * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1590  * occurred sending the query.  The resp parameter of the callback is
1591  * only valid if status is 0.
1592  *
1593  * If the return value of ib_sa_path_rec_get() is negative, it is an
1594  * error code.  Otherwise it is a query ID that can be used to cancel
1595  * the query.
1596  */
1597 int ib_sa_path_rec_get(struct ib_sa_client *client,
1598                        struct ib_device *device, u8 port_num,
1599                        struct sa_path_rec *rec,
1600                        ib_sa_comp_mask comp_mask,
1601                        int timeout_ms, gfp_t gfp_mask,
1602                        void (*callback)(int status,
1603                                         struct sa_path_rec *resp,
1604                                         void *context),
1605                        void *context,
1606                        struct ib_sa_query **sa_query)
1607 {
1608         struct ib_sa_path_query *query;
1609         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1610         struct ib_sa_port   *port;
1611         struct ib_mad_agent *agent;
1612         struct ib_sa_mad *mad;
1613         enum opa_pr_supported status;
1614         int ret;
1615
1616         if (!sa_dev)
1617                 return -ENODEV;
1618
1619         if ((rec->rec_type != SA_PATH_REC_TYPE_IB) &&
1620             (rec->rec_type != SA_PATH_REC_TYPE_OPA))
1621                 return -EINVAL;
1622
1623         port  = &sa_dev->port[port_num - sa_dev->start_port];
1624         agent = port->agent;
1625
1626         query = kzalloc(sizeof(*query), gfp_mask);
1627         if (!query)
1628                 return -ENOMEM;
1629
1630         query->sa_query.port     = port;
1631         if (rec->rec_type == SA_PATH_REC_TYPE_OPA) {
1632                 status = opa_pr_query_possible(client, device, port_num, rec);
1633                 if (status == PR_NOT_SUPPORTED) {
1634                         ret = -EINVAL;
1635                         goto err1;
1636                 } else if (status == PR_OPA_SUPPORTED) {
1637                         query->sa_query.flags |= IB_SA_QUERY_OPA;
1638                 } else {
1639                         query->conv_pr =
1640                                 kmalloc(sizeof(*query->conv_pr), gfp_mask);
1641                         if (!query->conv_pr) {
1642                                 ret = -ENOMEM;
1643                                 goto err1;
1644                         }
1645                 }
1646         }
1647
1648         ret = alloc_mad(&query->sa_query, gfp_mask);
1649         if (ret)
1650                 goto err2;
1651
1652         ib_sa_client_get(client);
1653         query->sa_query.client = client;
1654         query->callback        = callback;
1655         query->context         = context;
1656
1657         mad = query->sa_query.mad_buf->mad;
1658         init_mad(&query->sa_query, agent);
1659
1660         query->sa_query.callback = callback ? ib_sa_path_rec_callback : NULL;
1661         query->sa_query.release  = ib_sa_path_rec_release;
1662         mad->mad_hdr.method      = IB_MGMT_METHOD_GET;
1663         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_PATH_REC);
1664         mad->sa_hdr.comp_mask    = comp_mask;
1665
1666         if (query->sa_query.flags & IB_SA_QUERY_OPA) {
1667                 ib_pack(opa_path_rec_table, ARRAY_SIZE(opa_path_rec_table),
1668                         rec, mad->data);
1669         } else if (query->conv_pr) {
1670                 sa_convert_path_opa_to_ib(query->conv_pr, rec);
1671                 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1672                         query->conv_pr, mad->data);
1673         } else {
1674                 ib_pack(path_rec_table, ARRAY_SIZE(path_rec_table),
1675                         rec, mad->data);
1676         }
1677
1678         *sa_query = &query->sa_query;
1679
1680         query->sa_query.flags |= IB_SA_ENABLE_LOCAL_SERVICE;
1681         query->sa_query.mad_buf->context[1] = (query->conv_pr) ?
1682                                                 query->conv_pr : rec;
1683
1684         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1685         if (ret < 0)
1686                 goto err3;
1687
1688         return ret;
1689
1690 err3:
1691         *sa_query = NULL;
1692         ib_sa_client_put(query->sa_query.client);
1693         free_mad(&query->sa_query);
1694 err2:
1695         kfree(query->conv_pr);
1696 err1:
1697         kfree(query);
1698         return ret;
1699 }
1700 EXPORT_SYMBOL(ib_sa_path_rec_get);
1701
1702 static void ib_sa_service_rec_callback(struct ib_sa_query *sa_query,
1703                                     int status,
1704                                     struct ib_sa_mad *mad)
1705 {
1706         struct ib_sa_service_query *query =
1707                 container_of(sa_query, struct ib_sa_service_query, sa_query);
1708
1709         if (mad) {
1710                 struct ib_sa_service_rec rec;
1711
1712                 ib_unpack(service_rec_table, ARRAY_SIZE(service_rec_table),
1713                           mad->data, &rec);
1714                 query->callback(status, &rec, query->context);
1715         } else
1716                 query->callback(status, NULL, query->context);
1717 }
1718
1719 static void ib_sa_service_rec_release(struct ib_sa_query *sa_query)
1720 {
1721         kfree(container_of(sa_query, struct ib_sa_service_query, sa_query));
1722 }
1723
1724 /**
1725  * ib_sa_service_rec_query - Start Service Record operation
1726  * @client:SA client
1727  * @device:device to send request on
1728  * @port_num: port number to send request on
1729  * @method:SA method - should be get, set, or delete
1730  * @rec:Service Record to send in request
1731  * @comp_mask:component mask to send in request
1732  * @timeout_ms:time to wait for response
1733  * @gfp_mask:GFP mask to use for internal allocations
1734  * @callback:function called when request completes, times out or is
1735  * canceled
1736  * @context:opaque user context passed to callback
1737  * @sa_query:request context, used to cancel request
1738  *
1739  * Send a Service Record set/get/delete to the SA to register,
1740  * unregister or query a service record.
1741  * The callback function will be called when the request completes (or
1742  * fails); status is 0 for a successful response, -EINTR if the query
1743  * is canceled, -ETIMEDOUT is the query timed out, or -EIO if an error
1744  * occurred sending the query.  The resp parameter of the callback is
1745  * only valid if status is 0.
1746  *
1747  * If the return value of ib_sa_service_rec_query() is negative, it is an
1748  * error code.  Otherwise it is a request ID that can be used to cancel
1749  * the query.
1750  */
1751 int ib_sa_service_rec_query(struct ib_sa_client *client,
1752                             struct ib_device *device, u8 port_num, u8 method,
1753                             struct ib_sa_service_rec *rec,
1754                             ib_sa_comp_mask comp_mask,
1755                             int timeout_ms, gfp_t gfp_mask,
1756                             void (*callback)(int status,
1757                                              struct ib_sa_service_rec *resp,
1758                                              void *context),
1759                             void *context,
1760                             struct ib_sa_query **sa_query)
1761 {
1762         struct ib_sa_service_query *query;
1763         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1764         struct ib_sa_port   *port;
1765         struct ib_mad_agent *agent;
1766         struct ib_sa_mad *mad;
1767         int ret;
1768
1769         if (!sa_dev)
1770                 return -ENODEV;
1771
1772         port  = &sa_dev->port[port_num - sa_dev->start_port];
1773         agent = port->agent;
1774
1775         if (method != IB_MGMT_METHOD_GET &&
1776             method != IB_MGMT_METHOD_SET &&
1777             method != IB_SA_METHOD_DELETE)
1778                 return -EINVAL;
1779
1780         query = kzalloc(sizeof(*query), gfp_mask);
1781         if (!query)
1782                 return -ENOMEM;
1783
1784         query->sa_query.port     = port;
1785         ret = alloc_mad(&query->sa_query, gfp_mask);
1786         if (ret)
1787                 goto err1;
1788
1789         ib_sa_client_get(client);
1790         query->sa_query.client = client;
1791         query->callback        = callback;
1792         query->context         = context;
1793
1794         mad = query->sa_query.mad_buf->mad;
1795         init_mad(&query->sa_query, agent);
1796
1797         query->sa_query.callback = callback ? ib_sa_service_rec_callback : NULL;
1798         query->sa_query.release  = ib_sa_service_rec_release;
1799         mad->mad_hdr.method      = method;
1800         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_SERVICE_REC);
1801         mad->sa_hdr.comp_mask    = comp_mask;
1802
1803         ib_pack(service_rec_table, ARRAY_SIZE(service_rec_table),
1804                 rec, mad->data);
1805
1806         *sa_query = &query->sa_query;
1807
1808         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1809         if (ret < 0)
1810                 goto err2;
1811
1812         return ret;
1813
1814 err2:
1815         *sa_query = NULL;
1816         ib_sa_client_put(query->sa_query.client);
1817         free_mad(&query->sa_query);
1818
1819 err1:
1820         kfree(query);
1821         return ret;
1822 }
1823 EXPORT_SYMBOL(ib_sa_service_rec_query);
1824
1825 static void ib_sa_mcmember_rec_callback(struct ib_sa_query *sa_query,
1826                                         int status,
1827                                         struct ib_sa_mad *mad)
1828 {
1829         struct ib_sa_mcmember_query *query =
1830                 container_of(sa_query, struct ib_sa_mcmember_query, sa_query);
1831
1832         if (mad) {
1833                 struct ib_sa_mcmember_rec rec;
1834
1835                 ib_unpack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1836                           mad->data, &rec);
1837                 query->callback(status, &rec, query->context);
1838         } else
1839                 query->callback(status, NULL, query->context);
1840 }
1841
1842 static void ib_sa_mcmember_rec_release(struct ib_sa_query *sa_query)
1843 {
1844         kfree(container_of(sa_query, struct ib_sa_mcmember_query, sa_query));
1845 }
1846
1847 int ib_sa_mcmember_rec_query(struct ib_sa_client *client,
1848                              struct ib_device *device, u8 port_num,
1849                              u8 method,
1850                              struct ib_sa_mcmember_rec *rec,
1851                              ib_sa_comp_mask comp_mask,
1852                              int timeout_ms, gfp_t gfp_mask,
1853                              void (*callback)(int status,
1854                                               struct ib_sa_mcmember_rec *resp,
1855                                               void *context),
1856                              void *context,
1857                              struct ib_sa_query **sa_query)
1858 {
1859         struct ib_sa_mcmember_query *query;
1860         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1861         struct ib_sa_port   *port;
1862         struct ib_mad_agent *agent;
1863         struct ib_sa_mad *mad;
1864         int ret;
1865
1866         if (!sa_dev)
1867                 return -ENODEV;
1868
1869         port  = &sa_dev->port[port_num - sa_dev->start_port];
1870         agent = port->agent;
1871
1872         query = kzalloc(sizeof(*query), gfp_mask);
1873         if (!query)
1874                 return -ENOMEM;
1875
1876         query->sa_query.port     = port;
1877         ret = alloc_mad(&query->sa_query, gfp_mask);
1878         if (ret)
1879                 goto err1;
1880
1881         ib_sa_client_get(client);
1882         query->sa_query.client = client;
1883         query->callback        = callback;
1884         query->context         = context;
1885
1886         mad = query->sa_query.mad_buf->mad;
1887         init_mad(&query->sa_query, agent);
1888
1889         query->sa_query.callback = callback ? ib_sa_mcmember_rec_callback : NULL;
1890         query->sa_query.release  = ib_sa_mcmember_rec_release;
1891         mad->mad_hdr.method      = method;
1892         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_MC_MEMBER_REC);
1893         mad->sa_hdr.comp_mask    = comp_mask;
1894
1895         ib_pack(mcmember_rec_table, ARRAY_SIZE(mcmember_rec_table),
1896                 rec, mad->data);
1897
1898         *sa_query = &query->sa_query;
1899
1900         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1901         if (ret < 0)
1902                 goto err2;
1903
1904         return ret;
1905
1906 err2:
1907         *sa_query = NULL;
1908         ib_sa_client_put(query->sa_query.client);
1909         free_mad(&query->sa_query);
1910
1911 err1:
1912         kfree(query);
1913         return ret;
1914 }
1915
1916 /* Support GuidInfoRecord */
1917 static void ib_sa_guidinfo_rec_callback(struct ib_sa_query *sa_query,
1918                                         int status,
1919                                         struct ib_sa_mad *mad)
1920 {
1921         struct ib_sa_guidinfo_query *query =
1922                 container_of(sa_query, struct ib_sa_guidinfo_query, sa_query);
1923
1924         if (mad) {
1925                 struct ib_sa_guidinfo_rec rec;
1926
1927                 ib_unpack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table),
1928                           mad->data, &rec);
1929                 query->callback(status, &rec, query->context);
1930         } else
1931                 query->callback(status, NULL, query->context);
1932 }
1933
1934 static void ib_sa_guidinfo_rec_release(struct ib_sa_query *sa_query)
1935 {
1936         kfree(container_of(sa_query, struct ib_sa_guidinfo_query, sa_query));
1937 }
1938
1939 int ib_sa_guid_info_rec_query(struct ib_sa_client *client,
1940                               struct ib_device *device, u8 port_num,
1941                               struct ib_sa_guidinfo_rec *rec,
1942                               ib_sa_comp_mask comp_mask, u8 method,
1943                               int timeout_ms, gfp_t gfp_mask,
1944                               void (*callback)(int status,
1945                                                struct ib_sa_guidinfo_rec *resp,
1946                                                void *context),
1947                               void *context,
1948                               struct ib_sa_query **sa_query)
1949 {
1950         struct ib_sa_guidinfo_query *query;
1951         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
1952         struct ib_sa_port *port;
1953         struct ib_mad_agent *agent;
1954         struct ib_sa_mad *mad;
1955         int ret;
1956
1957         if (!sa_dev)
1958                 return -ENODEV;
1959
1960         if (method != IB_MGMT_METHOD_GET &&
1961             method != IB_MGMT_METHOD_SET &&
1962             method != IB_SA_METHOD_DELETE) {
1963                 return -EINVAL;
1964         }
1965
1966         port  = &sa_dev->port[port_num - sa_dev->start_port];
1967         agent = port->agent;
1968
1969         query = kzalloc(sizeof(*query), gfp_mask);
1970         if (!query)
1971                 return -ENOMEM;
1972
1973         query->sa_query.port = port;
1974         ret = alloc_mad(&query->sa_query, gfp_mask);
1975         if (ret)
1976                 goto err1;
1977
1978         ib_sa_client_get(client);
1979         query->sa_query.client = client;
1980         query->callback        = callback;
1981         query->context         = context;
1982
1983         mad = query->sa_query.mad_buf->mad;
1984         init_mad(&query->sa_query, agent);
1985
1986         query->sa_query.callback = callback ? ib_sa_guidinfo_rec_callback : NULL;
1987         query->sa_query.release  = ib_sa_guidinfo_rec_release;
1988
1989         mad->mad_hdr.method      = method;
1990         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_GUID_INFO_REC);
1991         mad->sa_hdr.comp_mask    = comp_mask;
1992
1993         ib_pack(guidinfo_rec_table, ARRAY_SIZE(guidinfo_rec_table), rec,
1994                 mad->data);
1995
1996         *sa_query = &query->sa_query;
1997
1998         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
1999         if (ret < 0)
2000                 goto err2;
2001
2002         return ret;
2003
2004 err2:
2005         *sa_query = NULL;
2006         ib_sa_client_put(query->sa_query.client);
2007         free_mad(&query->sa_query);
2008
2009 err1:
2010         kfree(query);
2011         return ret;
2012 }
2013 EXPORT_SYMBOL(ib_sa_guid_info_rec_query);
2014
2015 bool ib_sa_sendonly_fullmem_support(struct ib_sa_client *client,
2016                                     struct ib_device *device,
2017                                     u8 port_num)
2018 {
2019         struct ib_sa_device *sa_dev = ib_get_client_data(device, &sa_client);
2020         struct ib_sa_port *port;
2021         bool ret = false;
2022         unsigned long flags;
2023
2024         if (!sa_dev)
2025                 return ret;
2026
2027         port  = &sa_dev->port[port_num - sa_dev->start_port];
2028
2029         spin_lock_irqsave(&port->classport_lock, flags);
2030         if ((port->classport_info.valid) &&
2031             (port->classport_info.data.type == RDMA_CLASS_PORT_INFO_IB))
2032                 ret = ib_get_cpi_capmask2(&port->classport_info.data.ib)
2033                         & IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT;
2034         spin_unlock_irqrestore(&port->classport_lock, flags);
2035         return ret;
2036 }
2037 EXPORT_SYMBOL(ib_sa_sendonly_fullmem_support);
2038
2039 struct ib_classport_info_context {
2040         struct completion       done;
2041         struct ib_sa_query      *sa_query;
2042 };
2043
2044 static void ib_classportinfo_cb(void *context)
2045 {
2046         struct ib_classport_info_context *cb_ctx = context;
2047
2048         complete(&cb_ctx->done);
2049 }
2050
2051 static void ib_sa_classport_info_rec_callback(struct ib_sa_query *sa_query,
2052                                               int status,
2053                                               struct ib_sa_mad *mad)
2054 {
2055         unsigned long flags;
2056         struct ib_sa_classport_info_query *query =
2057                 container_of(sa_query, struct ib_sa_classport_info_query, sa_query);
2058         struct ib_sa_classport_cache *info = &sa_query->port->classport_info;
2059
2060         if (mad) {
2061                 if (sa_query->flags & IB_SA_QUERY_OPA) {
2062                         struct opa_class_port_info rec;
2063
2064                         ib_unpack(opa_classport_info_rec_table,
2065                                   ARRAY_SIZE(opa_classport_info_rec_table),
2066                                   mad->data, &rec);
2067
2068                         spin_lock_irqsave(&sa_query->port->classport_lock,
2069                                           flags);
2070                         if (!status && !info->valid) {
2071                                 memcpy(&info->data.opa, &rec,
2072                                        sizeof(info->data.opa));
2073
2074                                 info->valid = true;
2075                                 info->data.type = RDMA_CLASS_PORT_INFO_OPA;
2076                         }
2077                         spin_unlock_irqrestore(&sa_query->port->classport_lock,
2078                                                flags);
2079
2080                 } else {
2081                         struct ib_class_port_info rec;
2082
2083                         ib_unpack(ib_classport_info_rec_table,
2084                                   ARRAY_SIZE(ib_classport_info_rec_table),
2085                                   mad->data, &rec);
2086
2087                         spin_lock_irqsave(&sa_query->port->classport_lock,
2088                                           flags);
2089                         if (!status && !info->valid) {
2090                                 memcpy(&info->data.ib, &rec,
2091                                        sizeof(info->data.ib));
2092
2093                                 info->valid = true;
2094                                 info->data.type = RDMA_CLASS_PORT_INFO_IB;
2095                         }
2096                         spin_unlock_irqrestore(&sa_query->port->classport_lock,
2097                                                flags);
2098                 }
2099         }
2100         query->callback(query->context);
2101 }
2102
2103 static void ib_sa_classport_info_rec_release(struct ib_sa_query *sa_query)
2104 {
2105         kfree(container_of(sa_query, struct ib_sa_classport_info_query,
2106                            sa_query));
2107 }
2108
2109 static int ib_sa_classport_info_rec_query(struct ib_sa_port *port,
2110                                           int timeout_ms,
2111                                           void (*callback)(void *context),
2112                                           void *context,
2113                                           struct ib_sa_query **sa_query)
2114 {
2115         struct ib_mad_agent *agent;
2116         struct ib_sa_classport_info_query *query;
2117         struct ib_sa_mad *mad;
2118         gfp_t gfp_mask = GFP_KERNEL;
2119         int ret;
2120
2121         agent = port->agent;
2122
2123         query = kzalloc(sizeof(*query), gfp_mask);
2124         if (!query)
2125                 return -ENOMEM;
2126
2127         query->sa_query.port = port;
2128         query->sa_query.flags |= rdma_cap_opa_ah(port->agent->device,
2129                                                  port->port_num) ?
2130                                  IB_SA_QUERY_OPA : 0;
2131         ret = alloc_mad(&query->sa_query, gfp_mask);
2132         if (ret)
2133                 goto err_free;
2134
2135         query->callback = callback;
2136         query->context = context;
2137
2138         mad = query->sa_query.mad_buf->mad;
2139         init_mad(&query->sa_query, agent);
2140
2141         query->sa_query.callback = ib_sa_classport_info_rec_callback;
2142         query->sa_query.release  = ib_sa_classport_info_rec_release;
2143         mad->mad_hdr.method      = IB_MGMT_METHOD_GET;
2144         mad->mad_hdr.attr_id     = cpu_to_be16(IB_SA_ATTR_CLASS_PORTINFO);
2145         mad->sa_hdr.comp_mask    = 0;
2146         *sa_query = &query->sa_query;
2147
2148         ret = send_mad(&query->sa_query, timeout_ms, gfp_mask);
2149         if (ret < 0)
2150                 goto err_free_mad;
2151
2152         return ret;
2153
2154 err_free_mad:
2155         *sa_query = NULL;
2156         free_mad(&query->sa_query);
2157
2158 err_free:
2159         kfree(query);
2160         return ret;
2161 }
2162
2163 static void update_ib_cpi(struct work_struct *work)
2164 {
2165         struct ib_sa_port *port =
2166                 container_of(work, struct ib_sa_port, ib_cpi_work.work);
2167         struct ib_classport_info_context *cb_context;
2168         unsigned long flags;
2169         int ret;
2170
2171         /* If the classport info is valid, nothing
2172          * to do here.
2173          */
2174         spin_lock_irqsave(&port->classport_lock, flags);
2175         if (port->classport_info.valid) {
2176                 spin_unlock_irqrestore(&port->classport_lock, flags);
2177                 return;
2178         }
2179         spin_unlock_irqrestore(&port->classport_lock, flags);
2180
2181         cb_context = kmalloc(sizeof(*cb_context), GFP_KERNEL);
2182         if (!cb_context)
2183                 goto err_nomem;
2184
2185         init_completion(&cb_context->done);
2186
2187         ret = ib_sa_classport_info_rec_query(port, 3000,
2188                                              ib_classportinfo_cb, cb_context,
2189                                              &cb_context->sa_query);
2190         if (ret < 0)
2191                 goto free_cb_err;
2192         wait_for_completion(&cb_context->done);
2193 free_cb_err:
2194         kfree(cb_context);
2195         spin_lock_irqsave(&port->classport_lock, flags);
2196
2197         /* If the classport info is still not valid, the query should have
2198          * failed for some reason. Retry issuing the query
2199          */
2200         if (!port->classport_info.valid) {
2201                 port->classport_info.retry_cnt++;
2202                 if (port->classport_info.retry_cnt <=
2203                     IB_SA_CPI_MAX_RETRY_CNT) {
2204                         unsigned long delay =
2205                                 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2206
2207                         queue_delayed_work(ib_wq, &port->ib_cpi_work, delay);
2208                 }
2209         }
2210         spin_unlock_irqrestore(&port->classport_lock, flags);
2211
2212 err_nomem:
2213         return;
2214 }
2215
2216 static void send_handler(struct ib_mad_agent *agent,
2217                          struct ib_mad_send_wc *mad_send_wc)
2218 {
2219         struct ib_sa_query *query = mad_send_wc->send_buf->context[0];
2220         unsigned long flags;
2221
2222         if (query->callback)
2223                 switch (mad_send_wc->status) {
2224                 case IB_WC_SUCCESS:
2225                         /* No callback -- already got recv */
2226                         break;
2227                 case IB_WC_RESP_TIMEOUT_ERR:
2228                         query->callback(query, -ETIMEDOUT, NULL);
2229                         break;
2230                 case IB_WC_WR_FLUSH_ERR:
2231                         query->callback(query, -EINTR, NULL);
2232                         break;
2233                 default:
2234                         query->callback(query, -EIO, NULL);
2235                         break;
2236                 }
2237
2238         spin_lock_irqsave(&idr_lock, flags);
2239         idr_remove(&query_idr, query->id);
2240         spin_unlock_irqrestore(&idr_lock, flags);
2241
2242         free_mad(query);
2243         if (query->client)
2244                 ib_sa_client_put(query->client);
2245         query->release(query);
2246 }
2247
2248 static void recv_handler(struct ib_mad_agent *mad_agent,
2249                          struct ib_mad_send_buf *send_buf,
2250                          struct ib_mad_recv_wc *mad_recv_wc)
2251 {
2252         struct ib_sa_query *query;
2253
2254         if (!send_buf)
2255                 return;
2256
2257         query = send_buf->context[0];
2258         if (query->callback) {
2259                 if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
2260                         query->callback(query,
2261                                         mad_recv_wc->recv_buf.mad->mad_hdr.status ?
2262                                         -EINVAL : 0,
2263                                         (struct ib_sa_mad *) mad_recv_wc->recv_buf.mad);
2264                 else
2265                         query->callback(query, -EIO, NULL);
2266         }
2267
2268         ib_free_recv_mad(mad_recv_wc);
2269 }
2270
2271 static void update_sm_ah(struct work_struct *work)
2272 {
2273         struct ib_sa_port *port =
2274                 container_of(work, struct ib_sa_port, update_task);
2275         struct ib_sa_sm_ah *new_ah;
2276         struct ib_port_attr port_attr;
2277         struct rdma_ah_attr   ah_attr;
2278         bool grh_required;
2279
2280         if (ib_query_port(port->agent->device, port->port_num, &port_attr)) {
2281                 pr_warn("Couldn't query port\n");
2282                 return;
2283         }
2284
2285         new_ah = kmalloc(sizeof(*new_ah), GFP_KERNEL);
2286         if (!new_ah)
2287                 return;
2288
2289         kref_init(&new_ah->ref);
2290         new_ah->src_path_mask = (1 << port_attr.lmc) - 1;
2291
2292         new_ah->pkey_index = 0;
2293         if (ib_find_pkey(port->agent->device, port->port_num,
2294                          IB_DEFAULT_PKEY_FULL, &new_ah->pkey_index))
2295                 pr_err("Couldn't find index for default PKey\n");
2296
2297         memset(&ah_attr, 0, sizeof(ah_attr));
2298         ah_attr.type = rdma_ah_find_type(port->agent->device,
2299                                          port->port_num);
2300         rdma_ah_set_dlid(&ah_attr, port_attr.sm_lid);
2301         rdma_ah_set_sl(&ah_attr, port_attr.sm_sl);
2302         rdma_ah_set_port_num(&ah_attr, port->port_num);
2303
2304         grh_required = rdma_is_grh_required(port->agent->device,
2305                                             port->port_num);
2306
2307         /*
2308          * The OPA sm_lid of 0xFFFF needs special handling so that it can be
2309          * differentiated from a permissive LID of 0xFFFF.  We set the
2310          * grh_required flag here so the SA can program the DGID in the
2311          * address handle appropriately
2312          */
2313         if (ah_attr.type == RDMA_AH_ATTR_TYPE_OPA &&
2314             (grh_required ||
2315              port_attr.sm_lid == be16_to_cpu(IB_LID_PERMISSIVE)))
2316                 rdma_ah_set_make_grd(&ah_attr, true);
2317
2318         if (ah_attr.type == RDMA_AH_ATTR_TYPE_IB && grh_required) {
2319                 rdma_ah_set_ah_flags(&ah_attr, IB_AH_GRH);
2320                 rdma_ah_set_subnet_prefix(&ah_attr,
2321                                           cpu_to_be64(port_attr.subnet_prefix));
2322                 rdma_ah_set_interface_id(&ah_attr,
2323                                          cpu_to_be64(IB_SA_WELL_KNOWN_GUID));
2324         }
2325
2326         new_ah->ah = rdma_create_ah(port->agent->qp->pd, &ah_attr);
2327         if (IS_ERR(new_ah->ah)) {
2328                 pr_warn("Couldn't create new SM AH\n");
2329                 kfree(new_ah);
2330                 return;
2331         }
2332
2333         spin_lock_irq(&port->ah_lock);
2334         if (port->sm_ah)
2335                 kref_put(&port->sm_ah->ref, free_sm_ah);
2336         port->sm_ah = new_ah;
2337         spin_unlock_irq(&port->ah_lock);
2338 }
2339
2340 static void ib_sa_event(struct ib_event_handler *handler,
2341                         struct ib_event *event)
2342 {
2343         if (event->event == IB_EVENT_PORT_ERR    ||
2344             event->event == IB_EVENT_PORT_ACTIVE ||
2345             event->event == IB_EVENT_LID_CHANGE  ||
2346             event->event == IB_EVENT_PKEY_CHANGE ||
2347             event->event == IB_EVENT_SM_CHANGE   ||
2348             event->event == IB_EVENT_CLIENT_REREGISTER) {
2349                 unsigned long flags;
2350                 struct ib_sa_device *sa_dev =
2351                         container_of(handler, typeof(*sa_dev), event_handler);
2352                 u8 port_num = event->element.port_num - sa_dev->start_port;
2353                 struct ib_sa_port *port = &sa_dev->port[port_num];
2354
2355                 if (!rdma_cap_ib_sa(handler->device, port->port_num))
2356                         return;
2357
2358                 spin_lock_irqsave(&port->ah_lock, flags);
2359                 if (port->sm_ah)
2360                         kref_put(&port->sm_ah->ref, free_sm_ah);
2361                 port->sm_ah = NULL;
2362                 spin_unlock_irqrestore(&port->ah_lock, flags);
2363
2364                 if (event->event == IB_EVENT_SM_CHANGE ||
2365                     event->event == IB_EVENT_CLIENT_REREGISTER ||
2366                     event->event == IB_EVENT_LID_CHANGE ||
2367                     event->event == IB_EVENT_PORT_ACTIVE) {
2368                         unsigned long delay =
2369                                 msecs_to_jiffies(IB_SA_CPI_RETRY_WAIT);
2370
2371                         spin_lock_irqsave(&port->classport_lock, flags);
2372                         port->classport_info.valid = false;
2373                         port->classport_info.retry_cnt = 0;
2374                         spin_unlock_irqrestore(&port->classport_lock, flags);
2375                         queue_delayed_work(ib_wq,
2376                                            &port->ib_cpi_work, delay);
2377                 }
2378                 queue_work(ib_wq, &sa_dev->port[port_num].update_task);
2379         }
2380 }
2381
2382 static void ib_sa_add_one(struct ib_device *device)
2383 {
2384         struct ib_sa_device *sa_dev;
2385         int s, e, i;
2386         int count = 0;
2387
2388         s = rdma_start_port(device);
2389         e = rdma_end_port(device);
2390
2391         sa_dev = kzalloc(sizeof *sa_dev +
2392                          (e - s + 1) * sizeof (struct ib_sa_port),
2393                          GFP_KERNEL);
2394         if (!sa_dev)
2395                 return;
2396
2397         sa_dev->start_port = s;
2398         sa_dev->end_port   = e;
2399
2400         for (i = 0; i <= e - s; ++i) {
2401                 spin_lock_init(&sa_dev->port[i].ah_lock);
2402                 if (!rdma_cap_ib_sa(device, i + 1))
2403                         continue;
2404
2405                 sa_dev->port[i].sm_ah    = NULL;
2406                 sa_dev->port[i].port_num = i + s;
2407
2408                 spin_lock_init(&sa_dev->port[i].classport_lock);
2409                 sa_dev->port[i].classport_info.valid = false;
2410
2411                 sa_dev->port[i].agent =
2412                         ib_register_mad_agent(device, i + s, IB_QPT_GSI,
2413                                               NULL, 0, send_handler,
2414                                               recv_handler, sa_dev, 0);
2415                 if (IS_ERR(sa_dev->port[i].agent))
2416                         goto err;
2417
2418                 INIT_WORK(&sa_dev->port[i].update_task, update_sm_ah);
2419                 INIT_DELAYED_WORK(&sa_dev->port[i].ib_cpi_work,
2420                                   update_ib_cpi);
2421
2422                 count++;
2423         }
2424
2425         if (!count)
2426                 goto free;
2427
2428         ib_set_client_data(device, &sa_client, sa_dev);
2429
2430         /*
2431          * We register our event handler after everything is set up,
2432          * and then update our cached info after the event handler is
2433          * registered to avoid any problems if a port changes state
2434          * during our initialization.
2435          */
2436
2437         INIT_IB_EVENT_HANDLER(&sa_dev->event_handler, device, ib_sa_event);
2438         ib_register_event_handler(&sa_dev->event_handler);
2439
2440         for (i = 0; i <= e - s; ++i) {
2441                 if (rdma_cap_ib_sa(device, i + 1))
2442                         update_sm_ah(&sa_dev->port[i].update_task);
2443         }
2444
2445         return;
2446
2447 err:
2448         while (--i >= 0) {
2449                 if (rdma_cap_ib_sa(device, i + 1))
2450                         ib_unregister_mad_agent(sa_dev->port[i].agent);
2451         }
2452 free:
2453         kfree(sa_dev);
2454         return;
2455 }
2456
2457 static void ib_sa_remove_one(struct ib_device *device, void *client_data)
2458 {
2459         struct ib_sa_device *sa_dev = client_data;
2460         int i;
2461
2462         if (!sa_dev)
2463                 return;
2464
2465         ib_unregister_event_handler(&sa_dev->event_handler);
2466         flush_workqueue(ib_wq);
2467
2468         for (i = 0; i <= sa_dev->end_port - sa_dev->start_port; ++i) {
2469                 if (rdma_cap_ib_sa(device, i + 1)) {
2470                         cancel_delayed_work_sync(&sa_dev->port[i].ib_cpi_work);
2471                         ib_unregister_mad_agent(sa_dev->port[i].agent);
2472                         if (sa_dev->port[i].sm_ah)
2473                                 kref_put(&sa_dev->port[i].sm_ah->ref, free_sm_ah);
2474                 }
2475
2476         }
2477
2478         kfree(sa_dev);
2479 }
2480
2481 int ib_sa_init(void)
2482 {
2483         int ret;
2484
2485         get_random_bytes(&tid, sizeof tid);
2486
2487         atomic_set(&ib_nl_sa_request_seq, 0);
2488
2489         ret = ib_register_client(&sa_client);
2490         if (ret) {
2491                 pr_err("Couldn't register ib_sa client\n");
2492                 goto err1;
2493         }
2494
2495         ret = mcast_init();
2496         if (ret) {
2497                 pr_err("Couldn't initialize multicast handling\n");
2498                 goto err2;
2499         }
2500
2501         ib_nl_wq = alloc_ordered_workqueue("ib_nl_sa_wq", WQ_MEM_RECLAIM);
2502         if (!ib_nl_wq) {
2503                 ret = -ENOMEM;
2504                 goto err3;
2505         }
2506
2507         INIT_DELAYED_WORK(&ib_nl_timed_work, ib_nl_request_timeout);
2508
2509         return 0;
2510
2511 err3:
2512         mcast_cleanup();
2513 err2:
2514         ib_unregister_client(&sa_client);
2515 err1:
2516         return ret;
2517 }
2518
2519 void ib_sa_cleanup(void)
2520 {
2521         cancel_delayed_work(&ib_nl_timed_work);
2522         flush_workqueue(ib_nl_wq);
2523         destroy_workqueue(ib_nl_wq);
2524         mcast_cleanup();
2525         ib_unregister_client(&sa_client);
2526         idr_destroy(&query_idr);
2527 }