lnet/klnds/o2iblnd/o2iblnd.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lnet/klnds/o2iblnd/o2iblnd.c
  33  *
  34  * Author: Eric Barton <eric@bartonsoftware.com>
  35  */
  36
  37 #include <asm/page.h>
  38 #include <linux/inetdevice.h>
  39
  40 #include "o2iblnd.h"
  41
  42 static const struct lnet_lnd the_o2iblnd;
  43
  44 struct kib_data kiblnd_data;
  45
  46 static __u32
  47 kiblnd_cksum (void *ptr, int nob)
  48 {
  49         char  *c  = ptr;
  50         __u32  sum = 0;
  51
  52         while (nob-- > 0)
  53                 sum = ((sum << 1) | (sum >> 31)) + *c++;
  54
  55         /* ensure I don't return 0 (== no checksum) */
  56         return (sum == 0) ? 1 : sum;
  57 }
  58
  59 static char *
  60 kiblnd_msgtype2str(int type)
  61 {
  62         switch (type) {
  63         case IBLND_MSG_CONNREQ:
  64                 return "CONNREQ";
  65
  66         case IBLND_MSG_CONNACK:
  67                 return "CONNACK";
  68
  69         case IBLND_MSG_NOOP:
  70                 return "NOOP";
  71
  72         case IBLND_MSG_IMMEDIATE:
  73                 return "IMMEDIATE";
  74
  75         case IBLND_MSG_PUT_REQ:
  76                 return "PUT_REQ";
  77
  78         case IBLND_MSG_PUT_NAK:
  79                 return "PUT_NAK";
  80
  81         case IBLND_MSG_PUT_ACK:
  82                 return "PUT_ACK";
  83
  84         case IBLND_MSG_PUT_DONE:
  85                 return "PUT_DONE";
  86
  87         case IBLND_MSG_GET_REQ:
  88                 return "GET_REQ";
  89
  90         case IBLND_MSG_GET_DONE:
  91                 return "GET_DONE";
  92
  93         default:
  94                 return "???";
  95         }
  96 }
  97
  98 static int
  99 kiblnd_msgtype2size(int type)
 100 {
 101         const int hdr_size = offsetof(struct kib_msg, ibm_u);
 102
 103         switch (type) {
 104         case IBLND_MSG_CONNREQ:
 105         case IBLND_MSG_CONNACK:
 106                 return hdr_size + sizeof(struct kib_connparams);
 107
 108         case IBLND_MSG_NOOP:
 109                 return hdr_size;
 110
 111         case IBLND_MSG_IMMEDIATE:
 112                 return offsetof(struct kib_msg, ibm_u.immediate.ibim_payload[0]);
 113
 114         case IBLND_MSG_PUT_REQ:
 115                 return hdr_size + sizeof(struct kib_putreq_msg);
 116
 117         case IBLND_MSG_PUT_ACK:
 118                 return hdr_size + sizeof(struct kib_putack_msg);
 119
 120         case IBLND_MSG_GET_REQ:
 121                 return hdr_size + sizeof(struct kib_get_msg);
 122
 123         case IBLND_MSG_PUT_NAK:
 124         case IBLND_MSG_PUT_DONE:
 125         case IBLND_MSG_GET_DONE:
 126                 return hdr_size + sizeof(struct kib_completion_msg);
 127         default:
 128                 return -1;
 129         }
 130 }
 131
 132 static int kiblnd_unpack_rd(struct kib_msg *msg, bool flip)
 133 {
 134         struct kib_rdma_desc *rd;
 135         int nob;
 136         int n;
 137         int i;
 138
 139         LASSERT(msg->ibm_type == IBLND_MSG_GET_REQ ||
 140                 msg->ibm_type == IBLND_MSG_PUT_ACK);
 141
 142         rd = msg->ibm_type == IBLND_MSG_GET_REQ ?
 143                 &msg->ibm_u.get.ibgm_rd :
 144                 &msg->ibm_u.putack.ibpam_rd;
 145
 146         if (flip) {
 147                 __swab32s(&rd->rd_key);
 148                 __swab32s(&rd->rd_nfrags);
 149         }
 150
 151         n = rd->rd_nfrags;
 152
 153         if (n <= 0 || n > IBLND_MAX_RDMA_FRAGS) {
 154                 CERROR("Bad nfrags: %d, should be 0 < n <= %d\n",
 155                        n, IBLND_MAX_RDMA_FRAGS);
 156                 return 1;
 157         }
 158
 159         nob = offsetof(struct kib_msg, ibm_u) +
 160                 kiblnd_rd_msg_size(rd, msg->ibm_type, n);
 161
 162         if (msg->ibm_nob < nob) {
 163                 CERROR("Short %s: %d(%d)\n",
 164                        kiblnd_msgtype2str(msg->ibm_type), msg->ibm_nob, nob);
 165                 return 1;
 166         }
 167
 168         if (!flip)
 169                 return 0;
 170
 171         for (i = 0; i < n; i++) {
 172                 __swab32s(&rd->rd_frags[i].rf_nob);
 173                 __swab64s(&rd->rd_frags[i].rf_addr);
 174         }
 175
 176         return 0;
 177 }
 178
 179 void kiblnd_pack_msg(struct lnet_ni *ni, struct kib_msg *msg, int version,
 180                      int credits, lnet_nid_t dstnid, __u64 dststamp)
 181 {
 182         struct kib_net *net = ni->ni_data;
 183
 184         /* CAVEAT EMPTOR! all message fields not set here should have been
 185          * initialised previously. */
 186         msg->ibm_magic    = IBLND_MSG_MAGIC;
 187         msg->ibm_version  = version;
 188         /*   ibm_type */
 189         msg->ibm_credits  = credits;
 190         /*   ibm_nob */
 191         msg->ibm_cksum    = 0;
 192         msg->ibm_srcnid   = ni->ni_nid;
 193         msg->ibm_srcstamp = net->ibn_incarnation;
 194         msg->ibm_dstnid   = dstnid;
 195         msg->ibm_dststamp = dststamp;
 196
 197         if (*kiblnd_tunables.kib_cksum) {
 198                 /* NB ibm_cksum zero while computing cksum */
 199                 msg->ibm_cksum = kiblnd_cksum(msg, msg->ibm_nob);
 200         }
 201 }
 202
 203 int kiblnd_unpack_msg(struct kib_msg *msg, int nob)
 204 {
 205         const int hdr_size = offsetof(struct kib_msg, ibm_u);
 206         __u32 msg_cksum;
 207         __u16 version;
 208         int msg_nob;
 209         bool flip;
 210
 211         /* 6 bytes are enough to have received magic + version */
 212         if (nob < 6) {
 213                 CERROR("Short message: %d\n", nob);
 214                 return -EPROTO;
 215         }
 216
 217         if (msg->ibm_magic == IBLND_MSG_MAGIC) {
 218                 flip = false;
 219         } else if (msg->ibm_magic == __swab32(IBLND_MSG_MAGIC)) {
 220                 flip = true;
 221         } else {
 222                 CERROR("Bad magic: %08x\n", msg->ibm_magic);
 223                 return -EPROTO;
 224         }
 225
 226         version = flip ? __swab16(msg->ibm_version) : msg->ibm_version;
 227         if (version != IBLND_MSG_VERSION &&
 228             version != IBLND_MSG_VERSION_1) {
 229                 CERROR("Bad version: %x\n", version);
 230                 return -EPROTO;
 231         }
 232
 233         if (nob < hdr_size) {
 234                 CERROR("Short message: %d\n", nob);
 235                 return -EPROTO;
 236         }
 237
 238         msg_nob = flip ? __swab32(msg->ibm_nob) : msg->ibm_nob;
 239         if (msg_nob > nob) {
 240                 CERROR("Short message: got %d, wanted %d\n", nob, msg_nob);
 241                 return -EPROTO;
 242         }
 243
 244         /* checksum must be computed with ibm_cksum zero and BEFORE anything
 245          * gets flipped
 246          */
 247         msg_cksum = flip ? __swab32(msg->ibm_cksum) : msg->ibm_cksum;
 248         msg->ibm_cksum = 0;
 249         if (msg_cksum != 0 &&
 250             msg_cksum != kiblnd_cksum(msg, msg_nob)) {
 251                 CERROR("Bad checksum\n");
 252                 return -EPROTO;
 253         }
 254
 255         msg->ibm_cksum = msg_cksum;
 256
 257         if (flip) {
 258                 /* leave magic unflipped as a clue to peer_ni endianness */
 259                 msg->ibm_version = version;
 260                 BUILD_BUG_ON(sizeof(msg->ibm_type) != 1);
 261                 BUILD_BUG_ON(sizeof(msg->ibm_credits) != 1);
 262                 msg->ibm_nob     = msg_nob;
 263                 __swab64s(&msg->ibm_srcnid);
 264                 __swab64s(&msg->ibm_srcstamp);
 265                 __swab64s(&msg->ibm_dstnid);
 266                 __swab64s(&msg->ibm_dststamp);
 267         }
 268
 269         if (msg->ibm_srcnid == LNET_NID_ANY) {
 270                 CERROR("Bad src nid: %s\n", libcfs_nid2str(msg->ibm_srcnid));
 271                 return -EPROTO;
 272         }
 273
 274         if (msg_nob < kiblnd_msgtype2size(msg->ibm_type)) {
 275                 CERROR("Short %s: %d(%d)\n", kiblnd_msgtype2str(msg->ibm_type),
 276                        msg_nob, kiblnd_msgtype2size(msg->ibm_type));
 277                 return -EPROTO;
 278         }
 279
 280         switch (msg->ibm_type) {
 281         default:
 282                 CERROR("Unknown message type %x\n", msg->ibm_type);
 283                 return -EPROTO;
 284
 285         case IBLND_MSG_NOOP:
 286         case IBLND_MSG_IMMEDIATE:
 287         case IBLND_MSG_PUT_REQ:
 288                 break;
 289
 290         case IBLND_MSG_PUT_ACK:
 291         case IBLND_MSG_GET_REQ:
 292                 if (kiblnd_unpack_rd(msg, flip))
 293                         return -EPROTO;
 294                 break;
 295
 296         case IBLND_MSG_PUT_NAK:
 297         case IBLND_MSG_PUT_DONE:
 298         case IBLND_MSG_GET_DONE:
 299                 if (flip)
 300                         __swab32s(&msg->ibm_u.completion.ibcm_status);
 301                 break;
 302
 303         case IBLND_MSG_CONNREQ:
 304         case IBLND_MSG_CONNACK:
 305                 if (flip) {
 306                         __swab16s(&msg->ibm_u.connparams.ibcp_queue_depth);
 307                         __swab16s(&msg->ibm_u.connparams.ibcp_max_frags);
 308                         __swab32s(&msg->ibm_u.connparams.ibcp_max_msg_size);
 309                 }
 310                 break;
 311         }
 312         return 0;
 313 }
 314
 315 int
 316 kiblnd_create_peer(struct lnet_ni *ni, struct kib_peer_ni **peerp,
 317                    lnet_nid_t nid)
 318 {
 319         struct kib_peer_ni *peer_ni;
 320         struct kib_net *net = ni->ni_data;
 321         int cpt = lnet_cpt_of_nid(nid, ni);
 322         unsigned long flags;
 323
 324         LASSERT(net != NULL);
 325         LASSERT(nid != LNET_NID_ANY);
 326
 327         LIBCFS_CPT_ALLOC(peer_ni, lnet_cpt_table(), cpt, sizeof(*peer_ni));
 328         if (!peer_ni) {
 329                 CERROR("Cannot allocate peer_ni\n");
 330                 return -ENOMEM;
 331         }
 332
 333         peer_ni->ibp_ni = ni;
 334         peer_ni->ibp_nid = nid;
 335         peer_ni->ibp_error = 0;
 336         peer_ni->ibp_last_alive = 0;
 337         peer_ni->ibp_max_frags = IBLND_MAX_RDMA_FRAGS;
 338         peer_ni->ibp_queue_depth = ni->ni_net->net_tunables.lct_peer_tx_credits;
 339         peer_ni->ibp_queue_depth_mod = 0;       /* try to use the default */
 340         atomic_set(&peer_ni->ibp_refcount, 1);  /* 1 ref for caller */
 341
 342         INIT_HLIST_NODE(&peer_ni->ibp_list);
 343         INIT_LIST_HEAD(&peer_ni->ibp_conns);
 344         INIT_LIST_HEAD(&peer_ni->ibp_tx_queue);
 345
 346         write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
 347
 348         /* always called with a ref on ni, which prevents ni being shutdown */
 349         LASSERT(net->ibn_shutdown == 0);
 350
 351         /* npeers only grows with the global lock held */
 352         atomic_inc(&net->ibn_npeers);
 353
 354         write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
 355
 356         *peerp = peer_ni;
 357         return 0;
 358 }
 359
 360 void
 361 kiblnd_destroy_peer(struct kib_peer_ni *peer_ni)
 362 {
 363         struct kib_net *net = peer_ni->ibp_ni->ni_data;
 364
 365         LASSERT(net != NULL);
 366         LASSERT (atomic_read(&peer_ni->ibp_refcount) == 0);
 367         LASSERT(!kiblnd_peer_active(peer_ni));
 368         LASSERT(kiblnd_peer_idle(peer_ni));
 369         LASSERT(list_empty(&peer_ni->ibp_tx_queue));
 370
 371         LIBCFS_FREE(peer_ni, sizeof(*peer_ni));
 372
 373         /* NB a peer_ni's connections keep a reference on their peer_ni until
 374          * they are destroyed, so we can be assured that _all_ state to do
 375          * with this peer_ni has been cleaned up when its refcount drops to
 376          * zero.
 377          */
 378         if (atomic_dec_and_test(&net->ibn_npeers))
 379                 wake_up_var(&net->ibn_npeers);
 380 }
 381
 382 struct kib_peer_ni *
 383 kiblnd_find_peer_locked(struct lnet_ni *ni, lnet_nid_t nid)
 384 {
 385         /* the caller is responsible for accounting the additional reference
 386          * that this creates
 387          */
 388         struct kib_peer_ni *peer_ni;
 389
 390         hash_for_each_possible(kiblnd_data.kib_peers, peer_ni,
 391                                ibp_list, nid) {
 392                 LASSERT(!kiblnd_peer_idle(peer_ni));
 393
 394                 /*
 395                  * Match a peer if its NID and the NID of the local NI it
 396                  * communicates over are the same. Otherwise don't match
 397                  * the peer, which will result in a new lnd peer being
 398                  * created.
 399                  */
 400                 if (peer_ni->ibp_nid != nid ||
 401                     peer_ni->ibp_ni->ni_nid != ni->ni_nid)
 402                         continue;
 403
 404                 CDEBUG(D_NET, "got peer_ni [%p] -> %s (%d) version: %x\n",
 405                        peer_ni, libcfs_nid2str(nid),
 406                        atomic_read(&peer_ni->ibp_refcount),
 407                        peer_ni->ibp_version);
 408                 return peer_ni;
 409         }
 410         return NULL;
 411 }
 412
 413 void
 414 kiblnd_unlink_peer_locked(struct kib_peer_ni *peer_ni)
 415 {
 416         LASSERT(list_empty(&peer_ni->ibp_conns));
 417
 418         LASSERT(kiblnd_peer_active(peer_ni));
 419         hlist_del_init(&peer_ni->ibp_list);
 420         /* lose peerlist's ref */
 421         kiblnd_peer_decref(peer_ni);
 422 }
 423
 424 static int
 425 kiblnd_get_peer_info(struct lnet_ni *ni, int index,
 426                      lnet_nid_t *nidp, int *count)
 427 {
 428         struct kib_peer_ni              *peer_ni;
 429         int                      i;
 430         unsigned long            flags;
 431
 432         read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
 433
 434         hash_for_each(kiblnd_data.kib_peers, i, peer_ni, ibp_list) {
 435                 LASSERT(!kiblnd_peer_idle(peer_ni));
 436
 437                 if (peer_ni->ibp_ni != ni)
 438                         continue;
 439
 440                 if (index-- > 0)
 441                         continue;
 442
 443                 *nidp = peer_ni->ibp_nid;
 444                 *count = atomic_read(&peer_ni->ibp_refcount);
 445
 446                 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
 447                 return 0;
 448         }
 449
 450         read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
 451         return -ENOENT;
 452 }
 453
 454 static void
 455 kiblnd_del_peer_locked(struct kib_peer_ni *peer_ni)
 456 {
 457         struct kib_conn *cnxt;
 458         struct kib_conn *conn;
 459
 460         if (list_empty(&peer_ni->ibp_conns)) {
 461                 kiblnd_unlink_peer_locked(peer_ni);
 462         } else {
 463                 list_for_each_entry_safe(conn, cnxt, &peer_ni->ibp_conns,
 464                                          ibc_list)
 465                         kiblnd_close_conn_locked(conn, 0);
 466                 /* NB closing peer_ni's last conn unlinked it. */
 467         }
 468         /* NB peer_ni now unlinked; might even be freed if the peer_ni table had the
 469          * last ref on it. */
 470 }
 471
 472 static int
 473 kiblnd_del_peer(struct lnet_ni *ni, lnet_nid_t nid)
 474 {
 475         LIST_HEAD(zombies);
 476         struct hlist_node *pnxt;
 477         struct kib_peer_ni *peer_ni;
 478         int lo;
 479         int hi;
 480         int i;
 481         unsigned long flags;
 482         int rc = -ENOENT;
 483
 484         write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
 485
 486         if (nid != LNET_NID_ANY) {
 487                 lo = hash_min(nid, HASH_BITS(kiblnd_data.kib_peers));
 488                 hi = lo;
 489         } else {
 490                 lo = 0;
 491                 hi = HASH_SIZE(kiblnd_data.kib_peers) - 1;
 492         }
 493
 494         for (i = lo; i <= hi; i++) {
 495                 hlist_for_each_entry_safe(peer_ni, pnxt,
 496                                           &kiblnd_data.kib_peers[i], ibp_list) {
 497                         LASSERT(!kiblnd_peer_idle(peer_ni));
 498
 499                         if (peer_ni->ibp_ni != ni)
 500                                 continue;
 501
 502                         if (!(nid == LNET_NID_ANY || peer_ni->ibp_nid == nid))
 503                                 continue;
 504
 505                         if (!list_empty(&peer_ni->ibp_tx_queue)) {
 506                                 LASSERT(list_empty(&peer_ni->ibp_conns));
 507
 508                                 list_splice_init(&peer_ni->ibp_tx_queue,
 509                                                  &zombies);
 510                         }
 511
 512                         kiblnd_del_peer_locked(peer_ni);
 513                         rc = 0;         /* matched something */
 514                 }
 515         }
 516
 517         write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
 518
 519         kiblnd_txlist_done(&zombies, -EIO, LNET_MSG_STATUS_LOCAL_ERROR);
 520
 521         return rc;
 522 }
 523
 524 static struct kib_conn *
 525 kiblnd_get_conn_by_idx(struct lnet_ni *ni, int index)
 526 {
 527         struct kib_peer_ni *peer_ni;
 528         struct kib_conn *conn;
 529         struct list_head *ctmp;
 530         int i;
 531         unsigned long flags;
 532
 533         read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
 534
 535         hash_for_each(kiblnd_data.kib_peers, i, peer_ni, ibp_list) {
 536                 LASSERT(!kiblnd_peer_idle(peer_ni));
 537
 538                 if (peer_ni->ibp_ni != ni)
 539                         continue;
 540
 541                 list_for_each(ctmp, &peer_ni->ibp_conns) {
 542                         if (index-- > 0)
 543                                 continue;
 544
 545                         conn = list_entry(ctmp, struct kib_conn, ibc_list);
 546                         kiblnd_conn_addref(conn);
 547                         read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
 548                                                flags);
 549                         return conn;
 550                 }
 551         }
 552
 553         read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
 554         return NULL;
 555 }
 556
 557 static void
 558 kiblnd_debug_rx(struct kib_rx *rx)
 559 {
 560         CDEBUG(D_CONSOLE, "      %p msg_type %x cred %d\n",
 561                rx, rx->rx_msg->ibm_type,
 562                rx->rx_msg->ibm_credits);
 563 }
 564
 565 static void
 566 kiblnd_debug_tx(struct kib_tx *tx)
 567 {
 568         CDEBUG(D_CONSOLE, "      %p snd %d q %d w %d rc %d dl %lld "
 569                "cookie %#llx msg %s%s type %x cred %d\n",
 570                tx, tx->tx_sending, tx->tx_queued, tx->tx_waiting,
 571                tx->tx_status, ktime_to_ns(tx->tx_deadline), tx->tx_cookie,
 572                tx->tx_lntmsg[0] == NULL ? "-" : "!",
 573                tx->tx_lntmsg[1] == NULL ? "-" : "!",
 574                tx->tx_msg->ibm_type, tx->tx_msg->ibm_credits);
 575 }
 576
 577 void
 578 kiblnd_debug_conn(struct kib_conn *conn)
 579 {
 580         struct list_head        *tmp;
 581         int                     i;
 582
 583         spin_lock(&conn->ibc_lock);
 584
 585         CDEBUG(D_CONSOLE, "conn[%d] %p [version %x] -> %s:\n",
 586                atomic_read(&conn->ibc_refcount), conn,
 587                conn->ibc_version, libcfs_nid2str(conn->ibc_peer->ibp_nid));
 588         CDEBUG(D_CONSOLE, "   state %d nposted %d/%d cred %d o_cred %d "
 589                " r_cred %d\n", conn->ibc_state, conn->ibc_noops_posted,
 590                conn->ibc_nsends_posted, conn->ibc_credits,
 591                conn->ibc_outstanding_credits, conn->ibc_reserved_credits);
 592         CDEBUG(D_CONSOLE, "   comms_err %d\n", conn->ibc_comms_error);
 593
 594         CDEBUG(D_CONSOLE, "   early_rxs:\n");
 595         list_for_each(tmp, &conn->ibc_early_rxs)
 596                 kiblnd_debug_rx(list_entry(tmp, struct kib_rx, rx_list));
 597
 598         CDEBUG(D_CONSOLE, "   tx_noops:\n");
 599         list_for_each(tmp, &conn->ibc_tx_noops)
 600                 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
 601
 602         CDEBUG(D_CONSOLE, "   tx_queue_nocred:\n");
 603         list_for_each(tmp, &conn->ibc_tx_queue_nocred)
 604                 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
 605
 606         CDEBUG(D_CONSOLE, "   tx_queue_rsrvd:\n");
 607         list_for_each(tmp, &conn->ibc_tx_queue_rsrvd)
 608                 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
 609
 610         CDEBUG(D_CONSOLE, "   tx_queue:\n");
 611         list_for_each(tmp, &conn->ibc_tx_queue)
 612                 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
 613
 614         CDEBUG(D_CONSOLE, "   active_txs:\n");
 615         list_for_each(tmp, &conn->ibc_active_txs)
 616                 kiblnd_debug_tx(list_entry(tmp, struct kib_tx, tx_list));
 617
 618         CDEBUG(D_CONSOLE, "   rxs:\n");
 619         for (i = 0; i < IBLND_RX_MSGS(conn); i++)
 620                 kiblnd_debug_rx(&conn->ibc_rxs[i]);
 621
 622         spin_unlock(&conn->ibc_lock);
 623 }
 624
 625 static void
 626 kiblnd_setup_mtu_locked(struct rdma_cm_id *cmid)
 627 {
 628         /* XXX There is no path record for iWARP, set by netdev->change_mtu? */
 629         if (cmid->route.path_rec == NULL)
 630                 return;
 631
 632         if (*kiblnd_tunables.kib_ib_mtu)
 633                 cmid->route.path_rec->mtu =
 634                         ib_mtu_int_to_enum(*kiblnd_tunables.kib_ib_mtu);
 635 }
 636
 637 static int
 638 kiblnd_get_completion_vector(struct kib_conn *conn, int cpt)
 639 {
 640         cpumask_var_t   *mask;
 641         int             vectors;
 642         int             off;
 643         int             i;
 644         lnet_nid_t      ibp_nid;
 645
 646         vectors = conn->ibc_cmid->device->num_comp_vectors;
 647         if (vectors <= 1)
 648                 return 0;
 649
 650         mask = cfs_cpt_cpumask(lnet_cpt_table(), cpt);
 651
 652         /* hash NID to CPU id in this partition... */
 653         ibp_nid = conn->ibc_peer->ibp_nid;
 654         off = do_div(ibp_nid, cpumask_weight(*mask));
 655         for_each_cpu(i, *mask) {
 656                 if (off-- == 0)
 657                         return i % vectors;
 658         }
 659
 660         LBUG();
 661         return 1;
 662 }
 663
 664 /*
 665  * Get the scheduler bound to this CPT. If the scheduler has no
 666  * threads, which means that the CPT has no CPUs, then grab the
 667  * next scheduler that we can use.
 668  *
 669  * This case would be triggered if a NUMA node is configured with
 670  * no associated CPUs.
 671  */
 672 static struct kib_sched_info *
 673 kiblnd_get_scheduler(int cpt)
 674 {
 675         struct kib_sched_info *sched;
 676         int i;
 677
 678         sched = kiblnd_data.kib_scheds[cpt];
 679
 680         if (sched->ibs_nthreads > 0)
 681                 return sched;
 682
 683         cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
 684                 if (sched->ibs_nthreads > 0) {
 685                         CDEBUG(D_NET, "scheduler[%d] has no threads. selected scheduler[%d]\n",
 686                                         cpt, sched->ibs_cpt);
 687                         return sched;
 688                 }
 689         }
 690
 691         return NULL;
 692 }
 693
 694 static unsigned int kiblnd_send_wrs(struct kib_conn *conn)
 695 {
 696         /*
 697          * One WR for the LNet message
 698          * And ibc_max_frags for the transfer WRs
 699          */
 700         int ret;
 701         int multiplier = 1 + conn->ibc_max_frags;
 702         enum kib_dev_caps dev_caps = conn->ibc_hdev->ibh_dev->ibd_dev_caps;
 703
 704         /* FastReg needs two extra WRs for map and invalidate */
 705         if (dev_caps & IBLND_DEV_CAPS_FASTREG_ENABLED)
 706                 multiplier += 2;
 707
 708         /* account for a maximum of ibc_queue_depth in-flight transfers */
 709         ret = multiplier * conn->ibc_queue_depth;
 710
 711         if (ret > conn->ibc_hdev->ibh_max_qp_wr) {
 712                 CDEBUG(D_NET, "peer_credits %u will result in send work "
 713                        "request size %d larger than maximum %d device "
 714                        "can handle\n", conn->ibc_queue_depth, ret,
 715                        conn->ibc_hdev->ibh_max_qp_wr);
 716                 conn->ibc_queue_depth =
 717                         conn->ibc_hdev->ibh_max_qp_wr / multiplier;
 718         }
 719
 720         /* don't go beyond the maximum the device can handle */
 721         return min(ret, conn->ibc_hdev->ibh_max_qp_wr);
 722 }
 723
 724 struct kib_conn *
 725 kiblnd_create_conn(struct kib_peer_ni *peer_ni, struct rdma_cm_id *cmid,
 726                    int state, int version)
 727 {
 728         /* CAVEAT EMPTOR:
 729          * If the new conn is created successfully it takes over the caller's
 730          * ref on 'peer_ni'.  It also "owns" 'cmid' and destroys it when it itself
 731          * is destroyed.  On failure, the caller's ref on 'peer_ni' remains and
 732          * she must dispose of 'cmid'.  (Actually I'd block forever if I tried
 733          * to destroy 'cmid' here since I'm called from the CM which still has
 734          * its ref on 'cmid'). */
 735         rwlock_t               *glock = &kiblnd_data.kib_global_lock;
 736         struct kib_net              *net = peer_ni->ibp_ni->ni_data;
 737         struct kib_dev *dev;
 738         struct ib_qp_init_attr init_qp_attr = {};
 739         struct kib_sched_info   *sched;
 740 #ifdef HAVE_IB_CQ_INIT_ATTR
 741         struct ib_cq_init_attr  cq_attr = {};
 742 #endif
 743         struct kib_conn *conn;
 744         struct ib_cq            *cq;
 745         unsigned long           flags;
 746         int                     cpt;
 747         int                     rc;
 748         int                     i;
 749
 750         LASSERT(net != NULL);
 751         LASSERT(!in_interrupt());
 752
 753         dev = net->ibn_dev;
 754
 755         cpt = lnet_cpt_of_nid(peer_ni->ibp_nid, peer_ni->ibp_ni);
 756         sched = kiblnd_get_scheduler(cpt);
 757
 758         if (sched == NULL) {
 759                 CERROR("no schedulers available. node is unhealthy\n");
 760                 goto failed_0;
 761         }
 762
 763         /*
 764          * The cpt might have changed if we ended up selecting a non cpt
 765          * native scheduler. So use the scheduler's cpt instead.
 766          */
 767         cpt = sched->ibs_cpt;
 768
 769         LIBCFS_CPT_ALLOC(conn, lnet_cpt_table(), cpt, sizeof(*conn));
 770         if (conn == NULL) {
 771                 CERROR("Can't allocate connection for %s\n",
 772                        libcfs_nid2str(peer_ni->ibp_nid));
 773                 goto failed_0;
 774         }
 775
 776         conn->ibc_state = IBLND_CONN_INIT;
 777         conn->ibc_version = version;
 778         conn->ibc_peer = peer_ni;                       /* I take the caller's ref */
 779         cmid->context = conn;                   /* for future CM callbacks */
 780         conn->ibc_cmid = cmid;
 781         conn->ibc_max_frags = peer_ni->ibp_max_frags;
 782         conn->ibc_queue_depth = peer_ni->ibp_queue_depth;
 783         conn->ibc_rxs = NULL;
 784         conn->ibc_rx_pages = NULL;
 785
 786         INIT_LIST_HEAD(&conn->ibc_early_rxs);
 787         INIT_LIST_HEAD(&conn->ibc_tx_noops);
 788         INIT_LIST_HEAD(&conn->ibc_tx_queue);
 789         INIT_LIST_HEAD(&conn->ibc_tx_queue_rsrvd);
 790         INIT_LIST_HEAD(&conn->ibc_tx_queue_nocred);
 791         INIT_LIST_HEAD(&conn->ibc_active_txs);
 792         INIT_LIST_HEAD(&conn->ibc_zombie_txs);
 793         spin_lock_init(&conn->ibc_lock);
 794
 795         LIBCFS_CPT_ALLOC(conn->ibc_connvars, lnet_cpt_table(), cpt,
 796                          sizeof(*conn->ibc_connvars));
 797         if (conn->ibc_connvars == NULL) {
 798                 CERROR("Can't allocate in-progress connection state\n");
 799                 goto failed_2;
 800         }
 801
 802         write_lock_irqsave(glock, flags);
 803         if (dev->ibd_failover) {
 804                 write_unlock_irqrestore(glock, flags);
 805                 CERROR("%s: failover in progress\n", dev->ibd_ifname);
 806                 goto failed_2;
 807         }
 808
 809         if (dev->ibd_hdev->ibh_ibdev != cmid->device) {
 810                 /* wakeup failover thread and teardown connection */
 811                 if (kiblnd_dev_can_failover(dev)) {
 812                         list_add_tail(&dev->ibd_fail_list,
 813                                       &kiblnd_data.kib_failed_devs);
 814                         wake_up(&kiblnd_data.kib_failover_waitq);
 815                 }
 816
 817                 write_unlock_irqrestore(glock, flags);
 818                 CERROR("cmid HCA(%s), kib_dev(%s) need failover\n",
 819                        cmid->device->name, dev->ibd_ifname);
 820                 goto failed_2;
 821         }
 822
 823         kiblnd_hdev_addref_locked(dev->ibd_hdev);
 824         conn->ibc_hdev = dev->ibd_hdev;
 825
 826         kiblnd_setup_mtu_locked(cmid);
 827
 828         write_unlock_irqrestore(glock, flags);
 829
 830 #ifdef HAVE_IB_CQ_INIT_ATTR
 831         cq_attr.cqe = IBLND_CQ_ENTRIES(conn);
 832         cq_attr.comp_vector = kiblnd_get_completion_vector(conn, cpt);
 833         cq = ib_create_cq(cmid->device,
 834                           kiblnd_cq_completion, kiblnd_cq_event, conn,
 835                           &cq_attr);
 836 #else
 837         cq = ib_create_cq(cmid->device,
 838                           kiblnd_cq_completion, kiblnd_cq_event, conn,
 839                           IBLND_CQ_ENTRIES(conn),
 840                           kiblnd_get_completion_vector(conn, cpt));
 841 #endif
 842         if (IS_ERR(cq)) {
 843                 /*
 844                  * on MLX-5 (possibly MLX-4 as well) this error could be
 845                  * hit if the concurrent_sends and/or peer_tx_credits is set
 846                  * too high. Or due to an MLX-5 bug which tries to
 847                  * allocate 256kb via kmalloc for WR cookie array
 848                  */
 849                 CERROR("Failed to create CQ with %d CQEs: %ld\n",
 850                         IBLND_CQ_ENTRIES(conn), PTR_ERR(cq));
 851                 goto failed_2;
 852         }
 853
 854         conn->ibc_cq = cq;
 855
 856         rc = ib_req_notify_cq(cq, IB_CQ_NEXT_COMP);
 857         if (rc != 0) {
 858                 CERROR("Can't request completion notification: %d\n", rc);
 859                 goto failed_2;
 860         }
 861
 862         init_qp_attr.event_handler = kiblnd_qp_event;
 863         init_qp_attr.qp_context = conn;
 864         init_qp_attr.cap.max_send_sge = *kiblnd_tunables.kib_wrq_sge;
 865         init_qp_attr.cap.max_recv_sge = 1;
 866         init_qp_attr.sq_sig_type = IB_SIGNAL_REQ_WR;
 867         init_qp_attr.qp_type = IB_QPT_RC;
 868         init_qp_attr.send_cq = cq;
 869         init_qp_attr.recv_cq = cq;
 870
 871         if (peer_ni->ibp_queue_depth_mod &&
 872             peer_ni->ibp_queue_depth_mod < peer_ni->ibp_queue_depth) {
 873                 conn->ibc_queue_depth = peer_ni->ibp_queue_depth_mod;
 874                 CDEBUG(D_NET, "Use reduced queue depth %u (from %u)\n",
 875                        peer_ni->ibp_queue_depth_mod,
 876                        peer_ni->ibp_queue_depth);
 877         }
 878
 879         do {
 880                 /* kiblnd_send_wrs() can change the connection's queue depth if
 881                  * the maximum work requests for the device is maxed out
 882                  */
 883                 init_qp_attr.cap.max_send_wr = kiblnd_send_wrs(conn);
 884                 init_qp_attr.cap.max_recv_wr = IBLND_RECV_WRS(conn);
 885                 rc = rdma_create_qp(cmid, conn->ibc_hdev->ibh_pd,
 886                                     &init_qp_attr);
 887                 if (rc != -ENOMEM || conn->ibc_queue_depth < 2)
 888                         break;
 889                 conn->ibc_queue_depth--;
 890         } while (rc);
 891
 892         if (rc) {
 893                 CERROR("Can't create QP: %d, send_wr: %d, recv_wr: %d, "
 894                        "send_sge: %d, recv_sge: %d\n",
 895                        rc, init_qp_attr.cap.max_send_wr,
 896                        init_qp_attr.cap.max_recv_wr,
 897                        init_qp_attr.cap.max_send_sge,
 898                        init_qp_attr.cap.max_recv_sge);
 899                 goto failed_2;
 900         }
 901
 902         conn->ibc_sched = sched;
 903
 904         if (!peer_ni->ibp_queue_depth_mod &&
 905             conn->ibc_queue_depth != peer_ni->ibp_queue_depth) {
 906                 CWARN("peer %s - queue depth reduced from %u to %u"
 907                       "  to allow for qp creation\n",
 908                       libcfs_nid2str(peer_ni->ibp_nid),
 909                       peer_ni->ibp_queue_depth,
 910                       conn->ibc_queue_depth);
 911                 peer_ni->ibp_queue_depth_mod = conn->ibc_queue_depth;
 912         }
 913
 914         LIBCFS_CPT_ALLOC(conn->ibc_rxs, lnet_cpt_table(), cpt,
 915                          IBLND_RX_MSGS(conn) * sizeof(struct kib_rx));
 916         if (conn->ibc_rxs == NULL) {
 917                 CERROR("Cannot allocate RX buffers\n");
 918                 goto failed_2;
 919         }
 920
 921         rc = kiblnd_alloc_pages(&conn->ibc_rx_pages, cpt,
 922                                 IBLND_RX_MSG_PAGES(conn));
 923         if (rc != 0)
 924                 goto failed_2;
 925
 926         kiblnd_map_rx_descs(conn);
 927
 928         /* 1 ref for caller and each rxmsg */
 929         atomic_set(&conn->ibc_refcount, 1 + IBLND_RX_MSGS(conn));
 930         conn->ibc_nrx = IBLND_RX_MSGS(conn);
 931
 932         /* post receives */
 933         for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
 934                 rc = kiblnd_post_rx(&conn->ibc_rxs[i], IBLND_POSTRX_NO_CREDIT);
 935                 if (rc != 0) {
 936                         CERROR("Can't post rxmsg: %d\n", rc);
 937
 938                         /* Make posted receives complete */
 939                         kiblnd_abort_receives(conn);
 940
 941                         /* correct # of posted buffers
 942                          * NB locking needed now I'm racing with completion */
 943                         spin_lock_irqsave(&sched->ibs_lock, flags);
 944                         conn->ibc_nrx -= IBLND_RX_MSGS(conn) - i;
 945                         spin_unlock_irqrestore(&sched->ibs_lock, flags);
 946
 947                         /* cmid will be destroyed by CM(ofed) after cm_callback
 948                          * returned, so we can't refer it anymore
 949                          * (by kiblnd_connd()->kiblnd_destroy_conn) */
 950                         rdma_destroy_qp(conn->ibc_cmid);
 951                         conn->ibc_cmid = NULL;
 952
 953                         /* Drop my own and unused rxbuffer refcounts */
 954                         while (i++ <= IBLND_RX_MSGS(conn))
 955                                 kiblnd_conn_decref(conn);
 956
 957                         return NULL;
 958                 }
 959         }
 960
 961         /* Init successful! */
 962         LASSERT (state == IBLND_CONN_ACTIVE_CONNECT ||
 963                  state == IBLND_CONN_PASSIVE_WAIT);
 964         conn->ibc_state = state;
 965
 966         /* 1 more conn */
 967         atomic_inc(&net->ibn_nconns);
 968         return conn;
 969
 970  failed_2:
 971         kiblnd_destroy_conn(conn);
 972         LIBCFS_FREE(conn, sizeof(*conn));
 973  failed_0:
 974         return NULL;
 975 }
 976
 977 void
 978 kiblnd_destroy_conn(struct kib_conn *conn)
 979 {
 980         struct rdma_cm_id *cmid = conn->ibc_cmid;
 981         struct kib_peer_ni *peer_ni = conn->ibc_peer;
 982
 983         LASSERT (!in_interrupt());
 984         LASSERT (atomic_read(&conn->ibc_refcount) == 0);
 985         LASSERT(list_empty(&conn->ibc_early_rxs));
 986         LASSERT(list_empty(&conn->ibc_tx_noops));
 987         LASSERT(list_empty(&conn->ibc_tx_queue));
 988         LASSERT(list_empty(&conn->ibc_tx_queue_rsrvd));
 989         LASSERT(list_empty(&conn->ibc_tx_queue_nocred));
 990         LASSERT(list_empty(&conn->ibc_active_txs));
 991         LASSERT (conn->ibc_noops_posted == 0);
 992         LASSERT (conn->ibc_nsends_posted == 0);
 993
 994         switch (conn->ibc_state) {
 995         default:
 996                 /* conn must be completely disengaged from the network */
 997                 LBUG();
 998
 999         case IBLND_CONN_DISCONNECTED:
1000                 /* connvars should have been freed already */
1001                 LASSERT (conn->ibc_connvars == NULL);
1002                 break;
1003
1004         case IBLND_CONN_INIT:
1005                 break;
1006         }
1007
1008         /* conn->ibc_cmid might be destroyed by CM already */
1009         if (cmid != NULL && cmid->qp != NULL)
1010                 rdma_destroy_qp(cmid);
1011
1012         if (conn->ibc_cq)
1013                 ib_destroy_cq(conn->ibc_cq);
1014
1015         kiblnd_txlist_done(&conn->ibc_zombie_txs, -ECONNABORTED,
1016                            LNET_MSG_STATUS_OK);
1017
1018         if (conn->ibc_rx_pages != NULL)
1019                 kiblnd_unmap_rx_descs(conn);
1020
1021         if (conn->ibc_rxs != NULL)
1022                 CFS_FREE_PTR_ARRAY(conn->ibc_rxs, IBLND_RX_MSGS(conn));
1023
1024         if (conn->ibc_connvars != NULL)
1025                 LIBCFS_FREE(conn->ibc_connvars, sizeof(*conn->ibc_connvars));
1026
1027         if (conn->ibc_hdev != NULL)
1028                 kiblnd_hdev_decref(conn->ibc_hdev);
1029
1030         /* See CAVEAT EMPTOR above in kiblnd_create_conn */
1031         if (conn->ibc_state != IBLND_CONN_INIT) {
1032                 struct kib_net *net = peer_ni->ibp_ni->ni_data;
1033
1034                 kiblnd_peer_decref(peer_ni);
1035                 rdma_destroy_id(cmid);
1036                 atomic_dec(&net->ibn_nconns);
1037         }
1038 }
1039
1040 int
1041 kiblnd_close_peer_conns_locked(struct kib_peer_ni *peer_ni, int why)
1042 {
1043         struct kib_conn *conn;
1044         struct kib_conn *cnxt;
1045         int count = 0;
1046
1047         list_for_each_entry_safe(conn, cnxt, &peer_ni->ibp_conns,
1048                                  ibc_list) {
1049                 CDEBUG(D_NET, "Closing conn -> %s, "
1050                               "version: %x, reason: %d\n",
1051                        libcfs_nid2str(peer_ni->ibp_nid),
1052                        conn->ibc_version, why);
1053
1054                 kiblnd_close_conn_locked(conn, why);
1055                 count++;
1056         }
1057
1058         return count;
1059 }
1060
1061 int
1062 kiblnd_close_stale_conns_locked(struct kib_peer_ni *peer_ni,
1063                                 int version, __u64 incarnation)
1064 {
1065         struct kib_conn *conn;
1066         struct kib_conn *cnxt;
1067         int count = 0;
1068
1069         list_for_each_entry_safe(conn, cnxt, &peer_ni->ibp_conns,
1070                                  ibc_list) {
1071                 if (conn->ibc_version     == version &&
1072                     conn->ibc_incarnation == incarnation)
1073                         continue;
1074
1075                 CDEBUG(D_NET, "Closing stale conn -> %s version: %x, "
1076                               "incarnation:%#llx(%x, %#llx)\n",
1077                        libcfs_nid2str(peer_ni->ibp_nid),
1078                        conn->ibc_version, conn->ibc_incarnation,
1079                        version, incarnation);
1080
1081                 kiblnd_close_conn_locked(conn, -ESTALE);
1082                 count++;
1083         }
1084
1085         return count;
1086 }
1087
1088 static int
1089 kiblnd_close_matching_conns(struct lnet_ni *ni, lnet_nid_t nid)
1090 {
1091         struct kib_peer_ni *peer_ni;
1092         struct hlist_node *pnxt;
1093         int lo;
1094         int hi;
1095         int i;
1096         unsigned long flags;
1097         int count = 0;
1098
1099         write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1100
1101         if (nid != LNET_NID_ANY) {
1102                 lo = hash_min(nid, HASH_BITS(kiblnd_data.kib_peers));
1103                 hi = lo;
1104         } else {
1105                 lo = 0;
1106                 hi = HASH_SIZE(kiblnd_data.kib_peers) - 1;
1107         }
1108
1109         for (i = lo; i <= hi; i++) {
1110                 hlist_for_each_entry_safe(peer_ni, pnxt,
1111                                           &kiblnd_data.kib_peers[i], ibp_list) {
1112                         LASSERT(!kiblnd_peer_idle(peer_ni));
1113
1114                         if (peer_ni->ibp_ni != ni)
1115                                 continue;
1116
1117                         if (!(nid == LNET_NID_ANY || nid == peer_ni->ibp_nid))
1118                                 continue;
1119
1120                         count += kiblnd_close_peer_conns_locked(peer_ni, 0);
1121                 }
1122         }
1123
1124         write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1125
1126         /* wildcards always succeed */
1127         if (nid == LNET_NID_ANY)
1128                 return 0;
1129
1130         return (count == 0) ? -ENOENT : 0;
1131 }
1132
1133 static int
1134 kiblnd_ctl(struct lnet_ni *ni, unsigned int cmd, void *arg)
1135 {
1136         struct libcfs_ioctl_data *data = arg;
1137         int                       rc = -EINVAL;
1138
1139         switch(cmd) {
1140         case IOC_LIBCFS_GET_PEER: {
1141                 lnet_nid_t   nid = 0;
1142                 int          count = 0;
1143
1144                 rc = kiblnd_get_peer_info(ni, data->ioc_count,
1145                                           &nid, &count);
1146                 data->ioc_nid    = nid;
1147                 data->ioc_count  = count;
1148                 break;
1149         }
1150
1151         case IOC_LIBCFS_DEL_PEER: {
1152                 rc = kiblnd_del_peer(ni, data->ioc_nid);
1153                 break;
1154         }
1155         case IOC_LIBCFS_GET_CONN: {
1156                 struct kib_conn *conn;
1157
1158                 rc = 0;
1159                 conn = kiblnd_get_conn_by_idx(ni, data->ioc_count);
1160                 if (conn == NULL) {
1161                         rc = -ENOENT;
1162                         break;
1163                 }
1164
1165                 LASSERT(conn->ibc_cmid != NULL);
1166                 data->ioc_nid = conn->ibc_peer->ibp_nid;
1167                 if (conn->ibc_cmid->route.path_rec == NULL)
1168                         data->ioc_u32[0] = 0; /* iWarp has no path MTU */
1169                 else
1170                         data->ioc_u32[0] =
1171                         ib_mtu_enum_to_int(conn->ibc_cmid->route.path_rec->mtu);
1172                 kiblnd_conn_decref(conn);
1173                 break;
1174         }
1175         case IOC_LIBCFS_CLOSE_CONNECTION: {
1176                 rc = kiblnd_close_matching_conns(ni, data->ioc_nid);
1177                 break;
1178         }
1179
1180         default:
1181                 break;
1182         }
1183
1184         return rc;
1185 }
1186
1187 static void
1188 kiblnd_free_pages(struct kib_pages *p)
1189 {
1190         int     npages = p->ibp_npages;
1191         int     i;
1192
1193         for (i = 0; i < npages; i++) {
1194                 if (p->ibp_pages[i] != NULL)
1195                         __free_page(p->ibp_pages[i]);
1196         }
1197
1198         LIBCFS_FREE(p, offsetof(struct kib_pages, ibp_pages[npages]));
1199 }
1200
1201 int
1202 kiblnd_alloc_pages(struct kib_pages **pp, int cpt, int npages)
1203 {
1204         struct kib_pages *p;
1205         int i;
1206
1207         LIBCFS_CPT_ALLOC(p, lnet_cpt_table(), cpt,
1208                          offsetof(struct kib_pages, ibp_pages[npages]));
1209         if (p == NULL) {
1210                 CERROR("Can't allocate descriptor for %d pages\n", npages);
1211                 return -ENOMEM;
1212         }
1213
1214         memset(p, 0, offsetof(struct kib_pages, ibp_pages[npages]));
1215         p->ibp_npages = npages;
1216
1217         for (i = 0; i < npages; i++) {
1218                 p->ibp_pages[i] = cfs_page_cpt_alloc(lnet_cpt_table(), cpt,
1219                                                      GFP_NOFS);
1220                 if (p->ibp_pages[i] == NULL) {
1221                         CERROR("Can't allocate page %d of %d\n", i, npages);
1222                         kiblnd_free_pages(p);
1223                         return -ENOMEM;
1224                 }
1225         }
1226
1227         *pp = p;
1228         return 0;
1229 }
1230
1231 void
1232 kiblnd_unmap_rx_descs(struct kib_conn *conn)
1233 {
1234         struct kib_rx *rx;
1235         int       i;
1236
1237         LASSERT (conn->ibc_rxs != NULL);
1238         LASSERT (conn->ibc_hdev != NULL);
1239
1240         for (i = 0; i < IBLND_RX_MSGS(conn); i++) {
1241                 rx = &conn->ibc_rxs[i];
1242
1243                 LASSERT(rx->rx_nob >= 0); /* not posted */
1244
1245                 kiblnd_dma_unmap_single(conn->ibc_hdev->ibh_ibdev,
1246                                         KIBLND_UNMAP_ADDR(rx, rx_msgunmap,
1247                                                           rx->rx_msgaddr),
1248                                         IBLND_MSG_SIZE, DMA_FROM_DEVICE);
1249         }
1250
1251         kiblnd_free_pages(conn->ibc_rx_pages);
1252
1253         conn->ibc_rx_pages = NULL;
1254 }
1255
1256 void
1257 kiblnd_map_rx_descs(struct kib_conn *conn)
1258 {
1259         struct kib_rx *rx;
1260         struct page    *pg;
1261         int             pg_off;
1262         int             ipg;
1263         int             i;
1264
1265         for (pg_off = ipg = i = 0; i < IBLND_RX_MSGS(conn); i++) {
1266                 pg = conn->ibc_rx_pages->ibp_pages[ipg];
1267                 rx = &conn->ibc_rxs[i];
1268
1269                 rx->rx_conn = conn;
1270                 rx->rx_msg = (struct kib_msg *)(((char *)page_address(pg)) + pg_off);
1271
1272                 rx->rx_msgaddr =
1273                         kiblnd_dma_map_single(conn->ibc_hdev->ibh_ibdev,
1274                                               rx->rx_msg, IBLND_MSG_SIZE,
1275                                               DMA_FROM_DEVICE);
1276                 LASSERT(!kiblnd_dma_mapping_error(conn->ibc_hdev->ibh_ibdev,
1277                                                   rx->rx_msgaddr));
1278                 KIBLND_UNMAP_ADDR_SET(rx, rx_msgunmap, rx->rx_msgaddr);
1279
1280                 CDEBUG(D_NET, "rx %d: %p %#llx(%#llx)\n",
1281                        i, rx->rx_msg, rx->rx_msgaddr,
1282                        (__u64)(page_to_phys(pg) + pg_off));
1283
1284                 pg_off += IBLND_MSG_SIZE;
1285                 LASSERT(pg_off <= PAGE_SIZE);
1286
1287                 if (pg_off == PAGE_SIZE) {
1288                         pg_off = 0;
1289                         ipg++;
1290                         LASSERT(ipg <= IBLND_RX_MSG_PAGES(conn));
1291                 }
1292         }
1293 }
1294
1295 static void
1296 kiblnd_unmap_tx_pool(struct kib_tx_pool *tpo)
1297 {
1298         struct kib_hca_dev *hdev = tpo->tpo_hdev;
1299         struct kib_tx *tx;
1300         int i;
1301
1302         LASSERT (tpo->tpo_pool.po_allocated == 0);
1303
1304         if (hdev == NULL)
1305                 return;
1306
1307         for (i = 0; i < tpo->tpo_pool.po_size; i++) {
1308                 tx = &tpo->tpo_tx_descs[i];
1309                 kiblnd_dma_unmap_single(hdev->ibh_ibdev,
1310                                         KIBLND_UNMAP_ADDR(tx, tx_msgunmap,
1311                                                           tx->tx_msgaddr),
1312                                         IBLND_MSG_SIZE, DMA_TO_DEVICE);
1313         }
1314
1315         kiblnd_hdev_decref(hdev);
1316         tpo->tpo_hdev = NULL;
1317 }
1318
1319 static struct kib_hca_dev *
1320 kiblnd_current_hdev(struct kib_dev *dev)
1321 {
1322         struct kib_hca_dev *hdev;
1323         unsigned long  flags;
1324         int            i = 0;
1325
1326         read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1327         while (dev->ibd_failover) {
1328                 read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1329                 if (i++ % 50 == 0)
1330                         CDEBUG(D_NET, "%s: Wait for failover\n",
1331                                dev->ibd_ifname);
1332                 schedule_timeout_interruptible(cfs_time_seconds(1) / 100);
1333
1334                 read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
1335         }
1336
1337         kiblnd_hdev_addref_locked(dev->ibd_hdev);
1338         hdev = dev->ibd_hdev;
1339
1340         read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
1341
1342         return hdev;
1343 }
1344
1345 static void
1346 kiblnd_map_tx_pool(struct kib_tx_pool *tpo)
1347 {
1348         struct kib_pages *txpgs = tpo->tpo_tx_pages;
1349         struct kib_pool *pool = &tpo->tpo_pool;
1350         struct kib_net      *net   = pool->po_owner->ps_net;
1351         struct kib_dev *dev;
1352         struct page *page;
1353         struct kib_tx *tx;
1354         int             page_offset;
1355         int             ipage;
1356         int             i;
1357
1358         LASSERT (net != NULL);
1359
1360         dev = net->ibn_dev;
1361
1362         /* pre-mapped messages are not bigger than 1 page */
1363         BUILD_BUG_ON(IBLND_MSG_SIZE > PAGE_SIZE);
1364
1365         /* No fancy arithmetic when we do the buffer calculations */
1366         BUILD_BUG_ON(PAGE_SIZE % IBLND_MSG_SIZE != 0);
1367
1368         tpo->tpo_hdev = kiblnd_current_hdev(dev);
1369
1370         for (ipage = page_offset = i = 0; i < pool->po_size; i++) {
1371                 page = txpgs->ibp_pages[ipage];
1372                 tx = &tpo->tpo_tx_descs[i];
1373
1374                 tx->tx_msg = (struct kib_msg *)(((char *)page_address(page)) +
1375                                                 page_offset);
1376
1377                 tx->tx_msgaddr = kiblnd_dma_map_single(tpo->tpo_hdev->ibh_ibdev,
1378                                                        tx->tx_msg,
1379                                                        IBLND_MSG_SIZE,
1380                                                        DMA_TO_DEVICE);
1381                 LASSERT(!kiblnd_dma_mapping_error(tpo->tpo_hdev->ibh_ibdev,
1382                                                   tx->tx_msgaddr));
1383                 KIBLND_UNMAP_ADDR_SET(tx, tx_msgunmap, tx->tx_msgaddr);
1384
1385                 list_add(&tx->tx_list, &pool->po_free_list);
1386
1387                 page_offset += IBLND_MSG_SIZE;
1388                 LASSERT(page_offset <= PAGE_SIZE);
1389
1390                 if (page_offset == PAGE_SIZE) {
1391                         page_offset = 0;
1392                         ipage++;
1393                         LASSERT(ipage <= txpgs->ibp_npages);
1394                 }
1395         }
1396 }
1397
1398 static void
1399 kiblnd_destroy_fmr_pool(struct kib_fmr_pool *fpo)
1400 {
1401         LASSERT(fpo->fpo_map_count == 0);
1402
1403 #ifdef HAVE_FMR_POOL_API
1404         if (fpo->fpo_is_fmr && fpo->fmr.fpo_fmr_pool) {
1405                 ib_destroy_fmr_pool(fpo->fmr.fpo_fmr_pool);
1406         } else
1407 #endif /* HAVE_FMR_POOL_API */
1408         {
1409                 struct kib_fast_reg_descriptor *frd, *tmp;
1410                 int i = 0;
1411
1412                 list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1413                                          frd_list) {
1414                         list_del(&frd->frd_list);
1415 #ifndef HAVE_IB_MAP_MR_SG
1416                         ib_free_fast_reg_page_list(frd->frd_frpl);
1417 #endif
1418                         ib_dereg_mr(frd->frd_mr);
1419                         LIBCFS_FREE(frd, sizeof(*frd));
1420                         i++;
1421                 }
1422                 if (i < fpo->fast_reg.fpo_pool_size)
1423                         CERROR("FastReg pool still has %d regions registered\n",
1424                                 fpo->fast_reg.fpo_pool_size - i);
1425         }
1426
1427         if (fpo->fpo_hdev)
1428                 kiblnd_hdev_decref(fpo->fpo_hdev);
1429
1430         LIBCFS_FREE(fpo, sizeof(*fpo));
1431 }
1432
1433 static void
1434 kiblnd_destroy_fmr_pool_list(struct list_head *head)
1435 {
1436         struct kib_fmr_pool *fpo, *tmp;
1437
1438         list_for_each_entry_safe(fpo, tmp, head, fpo_list) {
1439                 list_del(&fpo->fpo_list);
1440                 kiblnd_destroy_fmr_pool(fpo);
1441         }
1442 }
1443
1444 static int
1445 kiblnd_fmr_pool_size(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1446                      int ncpts)
1447 {
1448         int size = tunables->lnd_fmr_pool_size / ncpts;
1449
1450         return max(IBLND_FMR_POOL, size);
1451 }
1452
1453 static int
1454 kiblnd_fmr_flush_trigger(struct lnet_ioctl_config_o2iblnd_tunables *tunables,
1455                          int ncpts)
1456 {
1457         int size = tunables->lnd_fmr_flush_trigger / ncpts;
1458
1459         return max(IBLND_FMR_POOL_FLUSH, size);
1460 }
1461
1462 #ifdef HAVE_FMR_POOL_API
1463 static int kiblnd_alloc_fmr_pool(struct kib_fmr_poolset *fps,
1464                                  struct kib_fmr_pool *fpo)
1465 {
1466         struct ib_fmr_pool_param param = {
1467                 .max_pages_per_fmr = LNET_MAX_IOV,
1468                 .page_shift        = PAGE_SHIFT,
1469                 .access            = (IB_ACCESS_LOCAL_WRITE |
1470                                       IB_ACCESS_REMOTE_WRITE),
1471                 .pool_size         = fps->fps_pool_size,
1472                 .dirty_watermark   = fps->fps_flush_trigger,
1473                 .flush_function    = NULL,
1474                 .flush_arg         = NULL,
1475                 .cache             = !!fps->fps_cache };
1476         int rc = 0;
1477
1478         fpo->fmr.fpo_fmr_pool = ib_create_fmr_pool(fpo->fpo_hdev->ibh_pd,
1479                                                    &param);
1480         if (IS_ERR(fpo->fmr.fpo_fmr_pool)) {
1481                 rc = PTR_ERR(fpo->fmr.fpo_fmr_pool);
1482                 if (rc != -ENOSYS)
1483                         CERROR("Failed to create FMR pool: %d\n", rc);
1484                 else
1485                         CERROR("FMRs are not supported\n");
1486         }
1487         fpo->fpo_is_fmr = true;
1488
1489         return rc;
1490 }
1491 #endif /* HAVE_FMR_POOL_API */
1492
1493 static int kiblnd_alloc_freg_pool(struct kib_fmr_poolset *fps,
1494                                   struct kib_fmr_pool *fpo,
1495                                   enum kib_dev_caps dev_caps)
1496 {
1497         struct kib_fast_reg_descriptor *frd, *tmp;
1498         int i, rc;
1499
1500 #ifdef HAVE_FMR_POOL_API
1501         fpo->fpo_is_fmr = false;
1502 #endif
1503
1504         INIT_LIST_HEAD(&fpo->fast_reg.fpo_pool_list);
1505         fpo->fast_reg.fpo_pool_size = 0;
1506         for (i = 0; i < fps->fps_pool_size; i++) {
1507                 LIBCFS_CPT_ALLOC(frd, lnet_cpt_table(), fps->fps_cpt,
1508                                  sizeof(*frd));
1509                 if (!frd) {
1510                         CERROR("Failed to allocate a new fast_reg descriptor\n");
1511                         rc = -ENOMEM;
1512                         goto out;
1513                 }
1514                 frd->frd_mr = NULL;
1515
1516 #ifndef HAVE_IB_MAP_MR_SG
1517                 frd->frd_frpl = ib_alloc_fast_reg_page_list(fpo->fpo_hdev->ibh_ibdev,
1518                                                             LNET_MAX_IOV);
1519                 if (IS_ERR(frd->frd_frpl)) {
1520                         rc = PTR_ERR(frd->frd_frpl);
1521                         CERROR("Failed to allocate ib_fast_reg_page_list: %d\n",
1522                                 rc);
1523                         frd->frd_frpl = NULL;
1524                         goto out_middle;
1525                 }
1526 #endif
1527
1528 #ifdef HAVE_IB_ALLOC_FAST_REG_MR
1529                 frd->frd_mr = ib_alloc_fast_reg_mr(fpo->fpo_hdev->ibh_pd,
1530                                                    LNET_MAX_IOV);
1531 #else
1532                 /*
1533                  * it is expected to get here if this is an MLX-5 card.
1534                  * MLX-4 cards will always use FMR and MLX-5 cards will
1535                  * always use fast_reg. It turns out that some MLX-5 cards
1536                  * (possibly due to older FW versions) do not natively support
1537                  * gaps. So we will need to track them here.
1538                  */
1539                 frd->frd_mr = ib_alloc_mr(fpo->fpo_hdev->ibh_pd,
1540 #ifdef IB_MR_TYPE_SG_GAPS
1541                                           ((*kiblnd_tunables.kib_use_fastreg_gaps == 1) &&
1542                                            (dev_caps & IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT)) ?
1543                                                 IB_MR_TYPE_SG_GAPS :
1544                                                 IB_MR_TYPE_MEM_REG,
1545 #else
1546                                                 IB_MR_TYPE_MEM_REG,
1547 #endif
1548                                           LNET_MAX_IOV);
1549                 if ((*kiblnd_tunables.kib_use_fastreg_gaps == 1) &&
1550                     (dev_caps & IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT))
1551                         CWARN("using IB_MR_TYPE_SG_GAPS, expect a performance drop\n");
1552 #endif
1553                 if (IS_ERR(frd->frd_mr)) {
1554                         rc = PTR_ERR(frd->frd_mr);
1555                         CERROR("Failed to allocate ib_fast_reg_mr: %d\n", rc);
1556                         frd->frd_mr = NULL;
1557                         goto out_middle;
1558                 }
1559
1560                 /* There appears to be a bug in MLX5 code where you must
1561                  * invalidate the rkey of a new FastReg pool before first
1562                  * using it. Thus, I am marking the FRD invalid here. */
1563                 frd->frd_valid = false;
1564
1565                 list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1566                 fpo->fast_reg.fpo_pool_size++;
1567         }
1568
1569         return 0;
1570
1571 out_middle:
1572         if (frd->frd_mr)
1573                 ib_dereg_mr(frd->frd_mr);
1574 #ifndef HAVE_IB_MAP_MR_SG
1575         if (frd->frd_frpl)
1576                 ib_free_fast_reg_page_list(frd->frd_frpl);
1577 #endif
1578         LIBCFS_FREE(frd, sizeof(*frd));
1579
1580 out:
1581         list_for_each_entry_safe(frd, tmp, &fpo->fast_reg.fpo_pool_list,
1582                                  frd_list) {
1583                 list_del(&frd->frd_list);
1584 #ifndef HAVE_IB_MAP_MR_SG
1585                 ib_free_fast_reg_page_list(frd->frd_frpl);
1586 #endif
1587                 ib_dereg_mr(frd->frd_mr);
1588                 LIBCFS_FREE(frd, sizeof(*frd));
1589         }
1590
1591         return rc;
1592 }
1593
1594 static int kiblnd_create_fmr_pool(struct kib_fmr_poolset *fps,
1595                                   struct kib_fmr_pool **pp_fpo)
1596 {
1597         struct kib_dev *dev = fps->fps_net->ibn_dev;
1598         struct kib_fmr_pool *fpo;
1599         int rc;
1600
1601         LIBCFS_CPT_ALLOC(fpo, lnet_cpt_table(), fps->fps_cpt, sizeof(*fpo));
1602         if (!fpo) {
1603                 return -ENOMEM;
1604         }
1605         memset(fpo, 0, sizeof(*fpo));
1606
1607         fpo->fpo_hdev = kiblnd_current_hdev(dev);
1608
1609 #ifdef HAVE_FMR_POOL_API
1610         if (dev->ibd_dev_caps & IBLND_DEV_CAPS_FMR_ENABLED)
1611                 rc = kiblnd_alloc_fmr_pool(fps, fpo);
1612         else
1613 #endif /* HAVE_FMR_POOL_API */
1614                 rc = kiblnd_alloc_freg_pool(fps, fpo, dev->ibd_dev_caps);
1615         if (rc)
1616                 goto out_fpo;
1617
1618         fpo->fpo_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
1619         fpo->fpo_owner = fps;
1620         *pp_fpo = fpo;
1621
1622         return 0;
1623
1624 out_fpo:
1625         kiblnd_hdev_decref(fpo->fpo_hdev);
1626         LIBCFS_FREE(fpo, sizeof(*fpo));
1627         return rc;
1628 }
1629
1630 static void
1631 kiblnd_fail_fmr_poolset(struct kib_fmr_poolset *fps, struct list_head *zombies)
1632 {
1633         if (fps->fps_net == NULL) /* intialized? */
1634                 return;
1635
1636         spin_lock(&fps->fps_lock);
1637
1638         while (!list_empty(&fps->fps_pool_list)) {
1639                 struct kib_fmr_pool *fpo = list_entry(fps->fps_pool_list.next,
1640                                                       struct kib_fmr_pool,
1641                                                       fpo_list);
1642
1643                 fpo->fpo_failed = 1;
1644                 if (fpo->fpo_map_count == 0)
1645                         list_move(&fpo->fpo_list, zombies);
1646                 else
1647                         list_move(&fpo->fpo_list, &fps->fps_failed_pool_list);
1648         }
1649
1650         spin_unlock(&fps->fps_lock);
1651 }
1652
1653 static void
1654 kiblnd_fini_fmr_poolset(struct kib_fmr_poolset *fps)
1655 {
1656         if (fps->fps_net != NULL) { /* initialized? */
1657                 kiblnd_destroy_fmr_pool_list(&fps->fps_failed_pool_list);
1658                 kiblnd_destroy_fmr_pool_list(&fps->fps_pool_list);
1659         }
1660 }
1661
1662 static int
1663 kiblnd_init_fmr_poolset(struct kib_fmr_poolset *fps, int cpt, int ncpts,
1664                         struct kib_net *net,
1665                         struct lnet_ioctl_config_o2iblnd_tunables *tunables)
1666 {
1667         struct kib_fmr_pool *fpo;
1668         int rc;
1669
1670         memset(fps, 0, sizeof(struct kib_fmr_poolset));
1671
1672         fps->fps_net = net;
1673         fps->fps_cpt = cpt;
1674
1675         fps->fps_pool_size = kiblnd_fmr_pool_size(tunables, ncpts);
1676         fps->fps_flush_trigger = kiblnd_fmr_flush_trigger(tunables, ncpts);
1677         fps->fps_cache = tunables->lnd_fmr_cache;
1678
1679         spin_lock_init(&fps->fps_lock);
1680         INIT_LIST_HEAD(&fps->fps_pool_list);
1681         INIT_LIST_HEAD(&fps->fps_failed_pool_list);
1682
1683         rc = kiblnd_create_fmr_pool(fps, &fpo);
1684         if (rc == 0)
1685                 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1686
1687         return rc;
1688 }
1689
1690 static int
1691 kiblnd_fmr_pool_is_idle(struct kib_fmr_pool *fpo, time64_t now)
1692 {
1693         if (fpo->fpo_map_count != 0) /* still in use */
1694                 return 0;
1695         if (fpo->fpo_failed)
1696                 return 1;
1697         return now >= fpo->fpo_deadline;
1698 }
1699
1700 #if defined(HAVE_FMR_POOL_API) || !defined(HAVE_IB_MAP_MR_SG)
1701 static int
1702 kiblnd_map_tx_pages(struct kib_tx *tx, struct kib_rdma_desc *rd)
1703 {
1704         struct kib_hca_dev *hdev;
1705         __u64           *pages = tx->tx_pages;
1706         int             npages;
1707         int             size;
1708         int             i;
1709
1710         hdev = tx->tx_pool->tpo_hdev;
1711
1712         for (i = 0, npages = 0; i < rd->rd_nfrags; i++) {
1713                 for (size = 0; size <  rd->rd_frags[i].rf_nob;
1714                         size += hdev->ibh_page_size) {
1715                         pages[npages++] = (rd->rd_frags[i].rf_addr &
1716                                            hdev->ibh_page_mask) + size;
1717                 }
1718         }
1719
1720         return npages;
1721 }
1722 #endif
1723
1724 void
1725 kiblnd_fmr_pool_unmap(struct kib_fmr *fmr, int status)
1726 {
1727         LIST_HEAD(zombies);
1728         struct kib_fmr_pool *fpo = fmr->fmr_pool;
1729         struct kib_fmr_poolset *fps;
1730         time64_t now = ktime_get_seconds();
1731         struct kib_fmr_pool *tmp;
1732
1733         if (!fpo)
1734                 return;
1735
1736         fps = fpo->fpo_owner;
1737
1738 #ifdef HAVE_FMR_POOL_API
1739         if (fpo->fpo_is_fmr) {
1740                 if (fmr->fmr_pfmr) {
1741                         ib_fmr_pool_unmap(fmr->fmr_pfmr);
1742                         fmr->fmr_pfmr = NULL;
1743                 }
1744
1745                 if (status) {
1746                         int rc = ib_flush_fmr_pool(fpo->fmr.fpo_fmr_pool);
1747                         LASSERT(!rc);
1748                 }
1749         } else
1750 #endif /* HAVE_FMR_POOL_API */
1751         {
1752                 struct kib_fast_reg_descriptor *frd = fmr->fmr_frd;
1753
1754                 if (frd) {
1755                         frd->frd_valid = false;
1756                         spin_lock(&fps->fps_lock);
1757                         list_add_tail(&frd->frd_list, &fpo->fast_reg.fpo_pool_list);
1758                         spin_unlock(&fps->fps_lock);
1759                         fmr->fmr_frd = NULL;
1760                 }
1761         }
1762         fmr->fmr_pool = NULL;
1763
1764         spin_lock(&fps->fps_lock);
1765         fpo->fpo_map_count--;   /* decref the pool */
1766
1767         list_for_each_entry_safe(fpo, tmp, &fps->fps_pool_list, fpo_list) {
1768                 /* the first pool is persistent */
1769                 if (fps->fps_pool_list.next == &fpo->fpo_list)
1770                         continue;
1771
1772                 if (kiblnd_fmr_pool_is_idle(fpo, now)) {
1773                         list_move(&fpo->fpo_list, &zombies);
1774                         fps->fps_version++;
1775                 }
1776         }
1777         spin_unlock(&fps->fps_lock);
1778
1779         if (!list_empty(&zombies))
1780                 kiblnd_destroy_fmr_pool_list(&zombies);
1781 }
1782
1783 int kiblnd_fmr_pool_map(struct kib_fmr_poolset *fps, struct kib_tx *tx,
1784                         struct kib_rdma_desc *rd, u32 nob, u64 iov,
1785                         struct kib_fmr *fmr)
1786 {
1787         struct kib_fmr_pool *fpo;
1788         __u64 version;
1789         bool is_rx = (rd != tx->tx_rd);
1790 #ifdef HAVE_FMR_POOL_API
1791         __u64 *pages = tx->tx_pages;
1792         bool tx_pages_mapped = false;
1793         int npages = 0;
1794 #endif
1795         int rc;
1796
1797 again:
1798         spin_lock(&fps->fps_lock);
1799         version = fps->fps_version;
1800         list_for_each_entry(fpo, &fps->fps_pool_list, fpo_list) {
1801                 fpo->fpo_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
1802                 fpo->fpo_map_count++;
1803
1804 #ifdef HAVE_FMR_POOL_API
1805                 fmr->fmr_pfmr = NULL;
1806                 if (fpo->fpo_is_fmr) {
1807                         struct ib_pool_fmr *pfmr;
1808
1809                         spin_unlock(&fps->fps_lock);
1810
1811                         if (!tx_pages_mapped) {
1812                                 npages = kiblnd_map_tx_pages(tx, rd);
1813                                 tx_pages_mapped = true;
1814                         }
1815
1816                         pfmr = kib_fmr_pool_map(fpo->fmr.fpo_fmr_pool,
1817                                                 pages, npages, iov);
1818                         if (likely(!IS_ERR(pfmr))) {
1819                                 fmr->fmr_key  = is_rx ? pfmr->fmr->rkey
1820                                         : pfmr->fmr->lkey;
1821                                 fmr->fmr_frd  = NULL;
1822                                 fmr->fmr_pfmr = pfmr;
1823                                 fmr->fmr_pool = fpo;
1824                                 return 0;
1825                         }
1826                         rc = PTR_ERR(pfmr);
1827                 } else
1828 #endif /* HAVE_FMR_POOL_API */
1829                 {
1830                         if (!list_empty(&fpo->fast_reg.fpo_pool_list)) {
1831                                 struct kib_fast_reg_descriptor *frd;
1832 #ifdef HAVE_IB_MAP_MR_SG
1833                                 struct ib_reg_wr *wr;
1834                                 int n;
1835 #else
1836                                 struct ib_rdma_wr *wr;
1837                                 struct ib_fast_reg_page_list *frpl;
1838 #endif
1839                                 struct ib_mr *mr;
1840
1841                                 frd = list_first_entry(
1842                                         &fpo->fast_reg.fpo_pool_list,
1843                                         struct kib_fast_reg_descriptor,
1844                                         frd_list);
1845                                 list_del(&frd->frd_list);
1846                                 spin_unlock(&fps->fps_lock);
1847
1848 #ifndef HAVE_IB_MAP_MR_SG
1849                                 frpl = frd->frd_frpl;
1850 #endif
1851                                 mr   = frd->frd_mr;
1852
1853                                 if (!frd->frd_valid) {
1854                                         struct ib_rdma_wr *inv_wr;
1855                                         __u32 key = is_rx ? mr->rkey : mr->lkey;
1856
1857                                         inv_wr = &frd->frd_inv_wr;
1858                                         memset(inv_wr, 0, sizeof(*inv_wr));
1859
1860                                         inv_wr->wr.opcode = IB_WR_LOCAL_INV;
1861                                         inv_wr->wr.wr_id  = IBLND_WID_MR;
1862                                         inv_wr->wr.ex.invalidate_rkey = key;
1863
1864                                         /* Bump the key */
1865                                         key = ib_inc_rkey(key);
1866                                         ib_update_fast_reg_key(mr, key);
1867                                 }
1868
1869 #ifdef HAVE_IB_MAP_MR_SG
1870 #ifdef HAVE_IB_MAP_MR_SG_5ARGS
1871                                 n = ib_map_mr_sg(mr, tx->tx_frags,
1872                                                  rd->rd_nfrags, NULL, PAGE_SIZE);
1873 #else
1874                                 n = ib_map_mr_sg(mr, tx->tx_frags,
1875                                                  rd->rd_nfrags, PAGE_SIZE);
1876 #endif /* HAVE_IB_MAP_MR_SG_5ARGS */
1877                                 if (unlikely(n != rd->rd_nfrags)) {
1878                                         CERROR("Failed to map mr %d/%d elements\n",
1879                                                n, rd->rd_nfrags);
1880                                         return n < 0 ? n : -EINVAL;
1881                                 }
1882
1883                                 wr = &frd->frd_fastreg_wr;
1884                                 memset(wr, 0, sizeof(*wr));
1885
1886                                 wr->wr.opcode = IB_WR_REG_MR;
1887                                 wr->wr.wr_id  = IBLND_WID_MR;
1888                                 wr->wr.num_sge = 0;
1889                                 wr->wr.send_flags = 0;
1890                                 wr->mr = mr;
1891                                 wr->key = is_rx ? mr->rkey : mr->lkey;
1892                                 wr->access = (IB_ACCESS_LOCAL_WRITE |
1893                                               IB_ACCESS_REMOTE_WRITE);
1894 #else /* HAVE_IB_MAP_MR_SG */
1895                                 if (!tx_pages_mapped) {
1896                                         npages = kiblnd_map_tx_pages(tx, rd);
1897                                         tx_pages_mapped = true;
1898                                 }
1899
1900                                 LASSERT(npages <= frpl->max_page_list_len);
1901                                 memcpy(frpl->page_list, pages,
1902                                        sizeof(*pages) * npages);
1903
1904                                 /* Prepare FastReg WR */
1905                                 wr = &frd->frd_fastreg_wr;
1906                                 memset(wr, 0, sizeof(*wr));
1907
1908                                 wr->wr.opcode = IB_WR_FAST_REG_MR;
1909                                 wr->wr.wr_id  = IBLND_WID_MR;
1910
1911                                 wr->wr.wr.fast_reg.iova_start = iov;
1912                                 wr->wr.wr.fast_reg.page_list  = frpl;
1913                                 wr->wr.wr.fast_reg.page_list_len = npages;
1914                                 wr->wr.wr.fast_reg.page_shift = PAGE_SHIFT;
1915                                 wr->wr.wr.fast_reg.length = nob;
1916                                 wr->wr.wr.fast_reg.rkey =
1917                                         is_rx ? mr->rkey : mr->lkey;
1918                                 wr->wr.wr.fast_reg.access_flags =
1919                                         (IB_ACCESS_LOCAL_WRITE |
1920                                          IB_ACCESS_REMOTE_WRITE);
1921 #endif /* HAVE_IB_MAP_MR_SG */
1922
1923                                 fmr->fmr_key  = is_rx ? mr->rkey : mr->lkey;
1924                                 fmr->fmr_frd  = frd;
1925                                 fmr->fmr_pool = fpo;
1926                                 return 0;
1927                         }
1928                         spin_unlock(&fps->fps_lock);
1929                         rc = -EAGAIN;
1930                 }
1931
1932                 spin_lock(&fps->fps_lock);
1933                 fpo->fpo_map_count--;
1934                 if (rc != -EAGAIN) {
1935                         spin_unlock(&fps->fps_lock);
1936                         return rc;
1937                 }
1938
1939                 /* EAGAIN and ... */
1940                 if (version != fps->fps_version) {
1941                         spin_unlock(&fps->fps_lock);
1942                         goto again;
1943                 }
1944         }
1945
1946         if (fps->fps_increasing) {
1947                 spin_unlock(&fps->fps_lock);
1948                 CDEBUG(D_NET, "Another thread is allocating new "
1949                        "FMR pool, waiting for her to complete\n");
1950                 wait_var_event(fps, !fps->fps_increasing);
1951                 goto again;
1952
1953         }
1954
1955         if (ktime_get_seconds() < fps->fps_next_retry) {
1956                 /* someone failed recently */
1957                 spin_unlock(&fps->fps_lock);
1958                 return -EAGAIN;
1959         }
1960
1961         fps->fps_increasing = 1;
1962         spin_unlock(&fps->fps_lock);
1963
1964         CDEBUG(D_NET, "Allocate new FMR pool\n");
1965         rc = kiblnd_create_fmr_pool(fps, &fpo);
1966         spin_lock(&fps->fps_lock);
1967         fps->fps_increasing = 0;
1968         wake_up_var(fps);
1969         if (rc == 0) {
1970                 fps->fps_version++;
1971                 list_add_tail(&fpo->fpo_list, &fps->fps_pool_list);
1972         } else {
1973                 fps->fps_next_retry = ktime_get_seconds() + IBLND_POOL_RETRY;
1974         }
1975         spin_unlock(&fps->fps_lock);
1976
1977         goto again;
1978 }
1979
1980 static void
1981 kiblnd_fini_pool(struct kib_pool *pool)
1982 {
1983         LASSERT(list_empty(&pool->po_free_list));
1984         LASSERT(pool->po_allocated == 0);
1985
1986         CDEBUG(D_NET, "Finalize %s pool\n", pool->po_owner->ps_name);
1987 }
1988
1989 static void
1990 kiblnd_init_pool(struct kib_poolset *ps, struct kib_pool *pool, int size)
1991 {
1992         CDEBUG(D_NET, "Initialize %s pool\n", ps->ps_name);
1993
1994         memset(pool, 0, sizeof(struct kib_pool));
1995         INIT_LIST_HEAD(&pool->po_free_list);
1996         pool->po_deadline = ktime_get_seconds() + IBLND_POOL_DEADLINE;
1997         pool->po_owner = ps;
1998         pool->po_size = size;
1999 }
2000
2001 static void
2002 kiblnd_destroy_pool_list(struct list_head *head)
2003 {
2004         struct kib_pool *pool;
2005
2006         while (!list_empty(head)) {
2007                 pool = list_entry(head->next, struct kib_pool, po_list);
2008                 list_del(&pool->po_list);
2009
2010                 LASSERT(pool->po_owner != NULL);
2011                 pool->po_owner->ps_pool_destroy(pool);
2012         }
2013 }
2014
2015 static void
2016 kiblnd_fail_poolset(struct kib_poolset *ps, struct list_head *zombies)
2017 {
2018         if (ps->ps_net == NULL) /* intialized? */
2019                 return;
2020
2021         spin_lock(&ps->ps_lock);
2022         while (!list_empty(&ps->ps_pool_list)) {
2023                 struct kib_pool *po = list_entry(ps->ps_pool_list.next,
2024                                                  struct kib_pool, po_list);
2025
2026                 po->po_failed = 1;
2027                 if (po->po_allocated == 0)
2028                         list_move(&po->po_list, zombies);
2029                 else
2030                         list_move(&po->po_list, &ps->ps_failed_pool_list);
2031         }
2032         spin_unlock(&ps->ps_lock);
2033 }
2034
2035 static void
2036 kiblnd_fini_poolset(struct kib_poolset *ps)
2037 {
2038         if (ps->ps_net != NULL) { /* initialized? */
2039                 kiblnd_destroy_pool_list(&ps->ps_failed_pool_list);
2040                 kiblnd_destroy_pool_list(&ps->ps_pool_list);
2041         }
2042 }
2043
2044 static int
2045 kiblnd_init_poolset(struct kib_poolset *ps, int cpt,
2046                     struct kib_net *net, char *name, int size,
2047                     kib_ps_pool_create_t po_create,
2048                     kib_ps_pool_destroy_t po_destroy,
2049                     kib_ps_node_init_t nd_init,
2050                     kib_ps_node_fini_t nd_fini)
2051 {
2052         struct kib_pool *pool;
2053         int rc;
2054
2055         memset(ps, 0, sizeof(struct kib_poolset));
2056
2057         ps->ps_cpt          = cpt;
2058         ps->ps_net          = net;
2059         ps->ps_pool_create  = po_create;
2060         ps->ps_pool_destroy = po_destroy;
2061         ps->ps_node_init    = nd_init;
2062         ps->ps_node_fini    = nd_fini;
2063         ps->ps_pool_size    = size;
2064         if (strlcpy(ps->ps_name, name, sizeof(ps->ps_name))
2065             >= sizeof(ps->ps_name))
2066                 return -E2BIG;
2067         spin_lock_init(&ps->ps_lock);
2068         INIT_LIST_HEAD(&ps->ps_pool_list);
2069         INIT_LIST_HEAD(&ps->ps_failed_pool_list);
2070
2071         rc = ps->ps_pool_create(ps, size, &pool);
2072         if (rc == 0)
2073                 list_add(&pool->po_list, &ps->ps_pool_list);
2074         else
2075                 CERROR("Failed to create the first pool for %s\n", ps->ps_name);
2076
2077         return rc;
2078 }
2079
2080 static int
2081 kiblnd_pool_is_idle(struct kib_pool *pool, time64_t now)
2082 {
2083         if (pool->po_allocated != 0) /* still in use */
2084                 return 0;
2085         if (pool->po_failed)
2086                 return 1;
2087         return now >= pool->po_deadline;
2088 }
2089
2090 void
2091 kiblnd_pool_free_node(struct kib_pool *pool, struct list_head *node)
2092 {
2093         LIST_HEAD(zombies);
2094         struct kib_poolset *ps = pool->po_owner;
2095         struct kib_pool *tmp;
2096         time64_t now = ktime_get_seconds();
2097
2098         spin_lock(&ps->ps_lock);
2099
2100         if (ps->ps_node_fini != NULL)
2101                 ps->ps_node_fini(pool, node);
2102
2103         LASSERT(pool->po_allocated > 0);
2104         list_add(node, &pool->po_free_list);
2105         pool->po_allocated--;
2106
2107         list_for_each_entry_safe(pool, tmp, &ps->ps_pool_list, po_list) {
2108                 /* the first pool is persistent */
2109                 if (ps->ps_pool_list.next == &pool->po_list)
2110                         continue;
2111
2112                 if (kiblnd_pool_is_idle(pool, now))
2113                         list_move(&pool->po_list, &zombies);
2114         }
2115         spin_unlock(&ps->ps_lock);
2116
2117         if (!list_empty(&zombies))
2118                 kiblnd_destroy_pool_list(&zombies);
2119 }
2120
2121 struct list_head *
2122 kiblnd_pool_alloc_node(struct kib_poolset *ps)
2123 {
2124         struct list_head        *node;
2125         struct kib_pool *pool;
2126         int                     rc;
2127         unsigned int            interval = 1;
2128         ktime_t time_before;
2129         unsigned int trips = 0;
2130
2131 again:
2132         spin_lock(&ps->ps_lock);
2133         list_for_each_entry(pool, &ps->ps_pool_list, po_list) {
2134                 if (list_empty(&pool->po_free_list))
2135                         continue;
2136
2137                 pool->po_allocated++;
2138                 pool->po_deadline = ktime_get_seconds() +
2139                                     IBLND_POOL_DEADLINE;
2140                 node = pool->po_free_list.next;
2141                 list_del(node);
2142
2143                 if (ps->ps_node_init != NULL) {
2144                         /* still hold the lock */
2145                         ps->ps_node_init(pool, node);
2146                 }
2147                 spin_unlock(&ps->ps_lock);
2148                 return node;
2149         }
2150
2151         /* no available tx pool and ... */
2152         if (ps->ps_increasing) {
2153                 /* another thread is allocating a new pool */
2154                 spin_unlock(&ps->ps_lock);
2155                 trips++;
2156                 CDEBUG(D_NET,
2157                        "Another thread is allocating new %s pool, waiting %d jiffies for her to complete. trips = %d\n",
2158                        ps->ps_name, interval, trips);
2159
2160                 schedule_timeout_interruptible(interval);
2161                 if (interval < cfs_time_seconds(1))
2162                         interval *= 2;
2163
2164                 goto again;
2165         }
2166
2167         if (ktime_get_seconds() < ps->ps_next_retry) {
2168                 /* someone failed recently */
2169                 spin_unlock(&ps->ps_lock);
2170                 return NULL;
2171         }
2172
2173         ps->ps_increasing = 1;
2174         spin_unlock(&ps->ps_lock);
2175
2176         CDEBUG(D_NET, "%s pool exhausted, allocate new pool\n", ps->ps_name);
2177         time_before = ktime_get();
2178         rc = ps->ps_pool_create(ps, ps->ps_pool_size, &pool);
2179         CDEBUG(D_NET, "ps_pool_create took %lld ms to complete",
2180                ktime_ms_delta(ktime_get(), time_before));
2181
2182         spin_lock(&ps->ps_lock);
2183         ps->ps_increasing = 0;
2184         if (rc == 0) {
2185                 list_add_tail(&pool->po_list, &ps->ps_pool_list);
2186         } else {
2187                 ps->ps_next_retry = ktime_get_seconds() + IBLND_POOL_RETRY;
2188                 CERROR("Can't allocate new %s pool because out of memory\n",
2189                        ps->ps_name);
2190         }
2191         spin_unlock(&ps->ps_lock);
2192
2193         goto again;
2194 }
2195
2196 static void
2197 kiblnd_destroy_tx_pool(struct kib_pool *pool)
2198 {
2199         struct kib_tx_pool *tpo = container_of(pool, struct kib_tx_pool,
2200                                                tpo_pool);
2201         int i;
2202
2203         LASSERT (pool->po_allocated == 0);
2204
2205         if (tpo->tpo_tx_pages != NULL) {
2206                 kiblnd_unmap_tx_pool(tpo);
2207                 kiblnd_free_pages(tpo->tpo_tx_pages);
2208         }
2209
2210         if (tpo->tpo_tx_descs == NULL)
2211                 goto out;
2212
2213         for (i = 0; i < pool->po_size; i++) {
2214                 struct kib_tx *tx = &tpo->tpo_tx_descs[i];
2215                 int       wrq_sge = *kiblnd_tunables.kib_wrq_sge;
2216
2217                 list_del(&tx->tx_list);
2218                 if (tx->tx_pages != NULL)
2219                         CFS_FREE_PTR_ARRAY(tx->tx_pages, LNET_MAX_IOV);
2220                 if (tx->tx_frags != NULL)
2221                         CFS_FREE_PTR_ARRAY(tx->tx_frags,
2222                                            (1 + IBLND_MAX_RDMA_FRAGS));
2223                 if (tx->tx_wrq != NULL)
2224                         CFS_FREE_PTR_ARRAY(tx->tx_wrq,
2225                                            (1 + IBLND_MAX_RDMA_FRAGS));
2226                 if (tx->tx_sge != NULL)
2227                         CFS_FREE_PTR_ARRAY(tx->tx_sge,
2228                                            (1 + IBLND_MAX_RDMA_FRAGS) *
2229                                            wrq_sge);
2230                 if (tx->tx_rd != NULL)
2231                         LIBCFS_FREE(tx->tx_rd,
2232                                     offsetof(struct kib_rdma_desc,
2233                                              rd_frags[IBLND_MAX_RDMA_FRAGS]));
2234         }
2235
2236         CFS_FREE_PTR_ARRAY(tpo->tpo_tx_descs, pool->po_size);
2237 out:
2238         kiblnd_fini_pool(pool);
2239         CFS_FREE_PTR(tpo);
2240 }
2241
2242 static int kiblnd_tx_pool_size(struct lnet_ni *ni, int ncpts)
2243 {
2244         struct lnet_ioctl_config_o2iblnd_tunables *tunables;
2245         int ntx;
2246
2247         tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
2248         ntx = tunables->lnd_ntx / ncpts;
2249
2250         return max(IBLND_TX_POOL, ntx);
2251 }
2252
2253 static int
2254 kiblnd_create_tx_pool(struct kib_poolset *ps, int size, struct kib_pool **pp_po)
2255 {
2256         int            i;
2257         int            npg;
2258         struct kib_pool *pool;
2259         struct kib_tx_pool *tpo;
2260
2261         LIBCFS_CPT_ALLOC(tpo, lnet_cpt_table(), ps->ps_cpt, sizeof(*tpo));
2262         if (tpo == NULL) {
2263                 CERROR("Failed to allocate TX pool\n");
2264                 return -ENOMEM;
2265         }
2266
2267         pool = &tpo->tpo_pool;
2268         kiblnd_init_pool(ps, pool, size);
2269         tpo->tpo_tx_descs = NULL;
2270         tpo->tpo_tx_pages = NULL;
2271
2272         npg = (size * IBLND_MSG_SIZE + PAGE_SIZE - 1) / PAGE_SIZE;
2273         if (kiblnd_alloc_pages(&tpo->tpo_tx_pages, ps->ps_cpt, npg) != 0) {
2274                 CERROR("Can't allocate tx pages: %d\n", npg);
2275                 CFS_FREE_PTR(tpo);
2276                 return -ENOMEM;
2277         }
2278
2279         LIBCFS_CPT_ALLOC(tpo->tpo_tx_descs, lnet_cpt_table(), ps->ps_cpt,
2280                          size * sizeof(struct kib_tx));
2281         if (tpo->tpo_tx_descs == NULL) {
2282                 CERROR("Can't allocate %d tx descriptors\n", size);
2283                 ps->ps_pool_destroy(pool);
2284                 return -ENOMEM;
2285         }
2286
2287         memset(tpo->tpo_tx_descs, 0, size * sizeof(struct kib_tx));
2288
2289         for (i = 0; i < size; i++) {
2290                 struct kib_tx *tx = &tpo->tpo_tx_descs[i];
2291                 int       wrq_sge = *kiblnd_tunables.kib_wrq_sge;
2292
2293                 tx->tx_pool = tpo;
2294                 if (ps->ps_net->ibn_fmr_ps != NULL) {
2295                         LIBCFS_CPT_ALLOC(tx->tx_pages,
2296                                          lnet_cpt_table(), ps->ps_cpt,
2297                                          LNET_MAX_IOV * sizeof(*tx->tx_pages));
2298                         if (tx->tx_pages == NULL)
2299                                 break;
2300                 }
2301
2302                 LIBCFS_CPT_ALLOC(tx->tx_frags, lnet_cpt_table(), ps->ps_cpt,
2303                                  (1 + IBLND_MAX_RDMA_FRAGS) *
2304                                  sizeof(*tx->tx_frags));
2305                 if (tx->tx_frags == NULL)
2306                         break;
2307
2308                 sg_init_table(tx->tx_frags, IBLND_MAX_RDMA_FRAGS + 1);
2309
2310                 LIBCFS_CPT_ALLOC(tx->tx_wrq, lnet_cpt_table(), ps->ps_cpt,
2311                                  (1 + IBLND_MAX_RDMA_FRAGS) *
2312                                  sizeof(*tx->tx_wrq));
2313                 if (tx->tx_wrq == NULL)
2314                         break;
2315
2316                 LIBCFS_CPT_ALLOC(tx->tx_sge, lnet_cpt_table(), ps->ps_cpt,
2317                                  (1 + IBLND_MAX_RDMA_FRAGS) * wrq_sge *
2318                                  sizeof(*tx->tx_sge));
2319                 if (tx->tx_sge == NULL)
2320                         break;
2321
2322                 LIBCFS_CPT_ALLOC(tx->tx_rd, lnet_cpt_table(), ps->ps_cpt,
2323                                  offsetof(struct kib_rdma_desc,
2324                                           rd_frags[IBLND_MAX_RDMA_FRAGS]));
2325                 if (tx->tx_rd == NULL)
2326                         break;
2327         }
2328
2329         if (i == size) {
2330                 kiblnd_map_tx_pool(tpo);
2331                 *pp_po = pool;
2332                 return 0;
2333         }
2334
2335         ps->ps_pool_destroy(pool);
2336         return -ENOMEM;
2337 }
2338
2339 static void
2340 kiblnd_tx_init(struct kib_pool *pool, struct list_head *node)
2341 {
2342         struct kib_tx_poolset *tps = container_of(pool->po_owner,
2343                                                   struct kib_tx_poolset,
2344                                                   tps_poolset);
2345         struct kib_tx *tx  = list_entry(node, struct kib_tx, tx_list);
2346
2347         tx->tx_cookie = tps->tps_next_tx_cookie++;
2348 }
2349
2350 static void
2351 kiblnd_net_fini_pools(struct kib_net *net)
2352 {
2353         int     i;
2354
2355         cfs_cpt_for_each(i, lnet_cpt_table()) {
2356                 struct kib_tx_poolset *tps;
2357                 struct kib_fmr_poolset *fps;
2358
2359                 if (net->ibn_tx_ps != NULL) {
2360                         tps = net->ibn_tx_ps[i];
2361                         kiblnd_fini_poolset(&tps->tps_poolset);
2362                 }
2363
2364                 if (net->ibn_fmr_ps != NULL) {
2365                         fps = net->ibn_fmr_ps[i];
2366                         kiblnd_fini_fmr_poolset(fps);
2367                 }
2368         }
2369
2370         if (net->ibn_tx_ps != NULL) {
2371                 cfs_percpt_free(net->ibn_tx_ps);
2372                 net->ibn_tx_ps = NULL;
2373         }
2374
2375         if (net->ibn_fmr_ps != NULL) {
2376                 cfs_percpt_free(net->ibn_fmr_ps);
2377                 net->ibn_fmr_ps = NULL;
2378         }
2379 }
2380
2381 static int
2382 kiblnd_net_init_pools(struct kib_net *net, struct lnet_ni *ni, __u32 *cpts,
2383                       int ncpts)
2384 {
2385         struct lnet_ioctl_config_o2iblnd_tunables *tunables;
2386 #ifdef HAVE_IB_GET_DMA_MR
2387         unsigned long   flags;
2388 #endif
2389         int             cpt;
2390         int             rc;
2391         int             i;
2392
2393         tunables = &ni->ni_lnd_tunables.lnd_tun_u.lnd_o2ib;
2394
2395 #ifdef HAVE_IB_GET_DMA_MR
2396         read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2397         /*
2398          * if lnd_map_on_demand is zero then we have effectively disabled
2399          * FMR or FastReg and we're using global memory regions
2400          * exclusively.
2401          */
2402         if (!tunables->lnd_map_on_demand) {
2403                 read_unlock_irqrestore(&kiblnd_data.kib_global_lock,
2404                                            flags);
2405                 goto create_tx_pool;
2406         }
2407
2408         read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2409 #endif
2410
2411         if (tunables->lnd_fmr_pool_size < tunables->lnd_ntx / 4) {
2412                 CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
2413                        tunables->lnd_fmr_pool_size,
2414                        tunables->lnd_ntx / 4);
2415                 rc = -EINVAL;
2416                 goto failed;
2417         }
2418
2419         /* TX pool must be created later than FMR, see LU-2268
2420          * for details */
2421         LASSERT(net->ibn_tx_ps == NULL);
2422
2423         /* premapping can fail if ibd_nmr > 1, so we always create
2424          * FMR pool and map-on-demand if premapping failed */
2425
2426         net->ibn_fmr_ps = cfs_percpt_alloc(lnet_cpt_table(),
2427                                            sizeof(struct kib_fmr_poolset));
2428         if (net->ibn_fmr_ps == NULL) {
2429                 CERROR("Failed to allocate FMR pool array\n");
2430                 rc = -ENOMEM;
2431                 goto failed;
2432         }
2433
2434         for (i = 0; i < ncpts; i++) {
2435                 cpt = (cpts == NULL) ? i : cpts[i];
2436                 rc = kiblnd_init_fmr_poolset(net->ibn_fmr_ps[cpt], cpt, ncpts,
2437                                              net, tunables);
2438                 if (rc != 0) {
2439                         CERROR("Can't initialize FMR pool for CPT %d: %d\n",
2440                                cpt, rc);
2441                         goto failed;
2442                 }
2443         }
2444
2445         if (i > 0)
2446                 LASSERT(i == ncpts);
2447
2448 #ifdef HAVE_IB_GET_DMA_MR
2449  create_tx_pool:
2450 #endif
2451         net->ibn_tx_ps = cfs_percpt_alloc(lnet_cpt_table(),
2452                                           sizeof(struct kib_tx_poolset));
2453         if (net->ibn_tx_ps == NULL) {
2454                 CERROR("Failed to allocate tx pool array\n");
2455                 rc = -ENOMEM;
2456                 goto failed;
2457         }
2458
2459         for (i = 0; i < ncpts; i++) {
2460                 cpt = (cpts == NULL) ? i : cpts[i];
2461                 rc = kiblnd_init_poolset(&net->ibn_tx_ps[cpt]->tps_poolset,
2462                                          cpt, net, "TX",
2463                                          kiblnd_tx_pool_size(ni, ncpts),
2464                                          kiblnd_create_tx_pool,
2465                                          kiblnd_destroy_tx_pool,
2466                                          kiblnd_tx_init, NULL);
2467                 if (rc != 0) {
2468                         CERROR("Can't initialize TX pool for CPT %d: %d\n",
2469                                cpt, rc);
2470                         goto failed;
2471                 }
2472         }
2473
2474         return 0;
2475  failed:
2476         kiblnd_net_fini_pools(net);
2477         LASSERT(rc != 0);
2478         return rc;
2479 }
2480
2481 static int
2482 kiblnd_port_get_attr(struct kib_hca_dev *hdev)
2483 {
2484         struct ib_port_attr *port_attr;
2485         int rc;
2486         unsigned long flags;
2487         rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2488
2489         LIBCFS_ALLOC(port_attr, sizeof(*port_attr));
2490         if (port_attr == NULL) {
2491                 CDEBUG(D_NETERROR, "Out of memory\n");
2492                 return -ENOMEM;
2493         }
2494
2495         rc = ib_query_port(hdev->ibh_ibdev, hdev->ibh_port, port_attr);
2496
2497         write_lock_irqsave(g_lock, flags);
2498
2499         if (rc == 0)
2500                 hdev->ibh_state = port_attr->state == IB_PORT_ACTIVE
2501                                  ? IBLND_DEV_PORT_ACTIVE
2502                                  : IBLND_DEV_PORT_DOWN;
2503
2504         write_unlock_irqrestore(g_lock, flags);
2505         LIBCFS_FREE(port_attr, sizeof(*port_attr));
2506
2507         if (rc != 0) {
2508                 CDEBUG(D_NETERROR, "Failed to query IB port: %d\n", rc);
2509                 return rc;
2510         }
2511         return 0;
2512 }
2513
2514 static inline void
2515 kiblnd_set_ni_fatal_on(struct kib_hca_dev *hdev, int val)
2516 {
2517         struct kib_net  *net;
2518
2519         /* for health check */
2520         list_for_each_entry(net, &hdev->ibh_dev->ibd_nets, ibn_list) {
2521                 if (val)
2522                         CDEBUG(D_NETERROR, "Fatal device error for NI %s\n",
2523                                         libcfs_nid2str(net->ibn_ni->ni_nid));
2524                 atomic_set(&net->ibn_ni->ni_fatal_error_on, val);
2525         }
2526 }
2527
2528 void
2529 kiblnd_event_handler(struct ib_event_handler *handler, struct ib_event *event)
2530 {
2531         rwlock_t *g_lock = &kiblnd_data.kib_global_lock;
2532         struct kib_hca_dev  *hdev;
2533         unsigned long flags;
2534
2535         hdev = container_of(handler, struct kib_hca_dev, ibh_event_handler);
2536
2537         write_lock_irqsave(g_lock, flags);
2538
2539         switch (event->event) {
2540         case IB_EVENT_DEVICE_FATAL:
2541                 CDEBUG(D_NET, "IB device fatal\n");
2542                 hdev->ibh_state = IBLND_DEV_FATAL;
2543                 kiblnd_set_ni_fatal_on(hdev, 1);
2544                 break;
2545         case IB_EVENT_PORT_ACTIVE:
2546                 CDEBUG(D_NET, "IB port active\n");
2547                 if (event->element.port_num == hdev->ibh_port) {
2548                         hdev->ibh_state = IBLND_DEV_PORT_ACTIVE;
2549                         kiblnd_set_ni_fatal_on(hdev, 0);
2550                 }
2551                 break;
2552         case IB_EVENT_PORT_ERR:
2553                 CDEBUG(D_NET, "IB port err\n");
2554                 if (event->element.port_num == hdev->ibh_port) {
2555                         hdev->ibh_state = IBLND_DEV_PORT_DOWN;
2556                         kiblnd_set_ni_fatal_on(hdev, 1);
2557                 }
2558                 break;
2559         default:
2560                 break;
2561         }
2562         write_unlock_irqrestore(g_lock, flags);
2563 }
2564
2565 static int
2566 kiblnd_hdev_get_attr(struct kib_hca_dev *hdev)
2567 {
2568         struct ib_device_attr *dev_attr;
2569         int rc = 0;
2570         int rc2 = 0;
2571
2572         /* It's safe to assume a HCA can handle a page size
2573          * matching that of the native system */
2574         hdev->ibh_page_shift = PAGE_SHIFT;
2575         hdev->ibh_page_size  = 1 << PAGE_SHIFT;
2576         hdev->ibh_page_mask  = ~((__u64)hdev->ibh_page_size - 1);
2577
2578 #ifndef HAVE_IB_DEVICE_ATTRS
2579         LIBCFS_ALLOC(dev_attr, sizeof(*dev_attr));
2580         if (dev_attr == NULL) {
2581                 CERROR("Out of memory\n");
2582                 return -ENOMEM;
2583         }
2584
2585         rc = ib_query_device(hdev->ibh_ibdev, dev_attr);
2586         if (rc != 0) {
2587                 CERROR("Failed to query IB device: %d\n", rc);
2588                 goto out_clean_attr;
2589         }
2590 #else
2591         dev_attr = &hdev->ibh_ibdev->attrs;
2592 #endif
2593
2594         hdev->ibh_mr_size = dev_attr->max_mr_size;
2595         hdev->ibh_max_qp_wr = dev_attr->max_qp_wr;
2596
2597         /* Setup device Memory Registration capabilities */
2598 #ifdef HAVE_FMR_POOL_API
2599 #ifdef HAVE_IB_DEVICE_OPS
2600         if (hdev->ibh_ibdev->ops.alloc_fmr &&
2601             hdev->ibh_ibdev->ops.dealloc_fmr &&
2602             hdev->ibh_ibdev->ops.map_phys_fmr &&
2603             hdev->ibh_ibdev->ops.unmap_fmr) {
2604 #else
2605         if (hdev->ibh_ibdev->alloc_fmr &&
2606             hdev->ibh_ibdev->dealloc_fmr &&
2607             hdev->ibh_ibdev->map_phys_fmr &&
2608             hdev->ibh_ibdev->unmap_fmr) {
2609 #endif
2610                 LCONSOLE_INFO("Using FMR for registration\n");
2611                 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FMR_ENABLED;
2612         } else
2613 #endif /* HAVE_FMR_POOL_API */
2614         if (dev_attr->device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS) {
2615                 LCONSOLE_INFO("Using FastReg for registration\n");
2616                 hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FASTREG_ENABLED;
2617 #ifndef HAVE_IB_ALLOC_FAST_REG_MR
2618 #ifdef IB_DEVICE_SG_GAPS_REG
2619                 if (dev_attr->device_cap_flags & IB_DEVICE_SG_GAPS_REG)
2620                         hdev->ibh_dev->ibd_dev_caps |= IBLND_DEV_CAPS_FASTREG_GAPS_SUPPORT;
2621 #endif
2622 #endif
2623         } else {
2624                 rc = -ENOSYS;
2625         }
2626
2627         rc2 = kiblnd_port_get_attr(hdev);
2628         if (rc2 != 0)
2629                 return rc2;
2630
2631         if (rc != 0)
2632                 rc = -EINVAL;
2633
2634 #ifndef HAVE_IB_DEVICE_ATTRS
2635 out_clean_attr:
2636         LIBCFS_FREE(dev_attr, sizeof(*dev_attr));
2637 #endif
2638
2639         if (rc == -ENOSYS)
2640                 CERROR("IB device does not support FMRs nor FastRegs, can't "
2641                        "register memory: %d\n", rc);
2642         else if (rc == -EINVAL)
2643                 CERROR("Invalid mr size: %#llx\n", hdev->ibh_mr_size);
2644         return rc;
2645 }
2646
2647 #ifdef HAVE_IB_GET_DMA_MR
2648 static void
2649 kiblnd_hdev_cleanup_mrs(struct kib_hca_dev *hdev)
2650 {
2651         if (hdev->ibh_mrs == NULL)
2652                 return;
2653
2654         ib_dereg_mr(hdev->ibh_mrs);
2655
2656         hdev->ibh_mrs = NULL;
2657 }
2658 #endif
2659
2660 void
2661 kiblnd_hdev_destroy(struct kib_hca_dev *hdev)
2662 {
2663         if (hdev->ibh_event_handler.device != NULL)
2664                 ib_unregister_event_handler(&hdev->ibh_event_handler);
2665
2666 #ifdef HAVE_IB_GET_DMA_MR
2667         kiblnd_hdev_cleanup_mrs(hdev);
2668 #endif
2669
2670         if (hdev->ibh_pd != NULL)
2671                 ib_dealloc_pd(hdev->ibh_pd);
2672
2673         if (hdev->ibh_cmid != NULL)
2674                 rdma_destroy_id(hdev->ibh_cmid);
2675
2676         LIBCFS_FREE(hdev, sizeof(*hdev));
2677 }
2678
2679 #ifdef HAVE_IB_GET_DMA_MR
2680 static int
2681 kiblnd_hdev_setup_mrs(struct kib_hca_dev *hdev)
2682 {
2683         struct ib_mr *mr;
2684         int           acflags = IB_ACCESS_LOCAL_WRITE |
2685                                 IB_ACCESS_REMOTE_WRITE;
2686
2687         mr = ib_get_dma_mr(hdev->ibh_pd, acflags);
2688         if (IS_ERR(mr)) {
2689                 CERROR("Failed ib_get_dma_mr: %ld\n", PTR_ERR(mr));
2690                 kiblnd_hdev_cleanup_mrs(hdev);
2691                 return PTR_ERR(mr);
2692         }
2693
2694         hdev->ibh_mrs = mr;
2695
2696         return 0;
2697 }
2698 #endif
2699
2700 static int
2701 kiblnd_dummy_callback(struct rdma_cm_id *cmid, struct rdma_cm_event *event)
2702 {       /* DUMMY */
2703         return 0;
2704 }
2705
2706 static int
2707 kiblnd_dev_need_failover(struct kib_dev *dev, struct net *ns)
2708 {
2709         struct rdma_cm_id  *cmid;
2710         struct sockaddr_in  srcaddr;
2711         struct sockaddr_in  dstaddr;
2712         int                 rc;
2713
2714         if (dev->ibd_hdev == NULL || /* initializing */
2715             dev->ibd_hdev->ibh_cmid == NULL || /* listener is dead */
2716             *kiblnd_tunables.kib_dev_failover > 1) /* debugging */
2717                 return 1;
2718
2719         /* XXX: it's UGLY, but I don't have better way to find
2720          * ib-bonding HCA failover because:
2721          *
2722          * a. no reliable CM event for HCA failover...
2723          * b. no OFED API to get ib_device for current net_device...
2724          *
2725          * We have only two choices at this point:
2726          *
2727          * a. rdma_bind_addr(), it will conflict with listener cmid
2728          * b. rdma_resolve_addr() to zero addr */
2729         cmid = kiblnd_rdma_create_id(ns, kiblnd_dummy_callback, dev,
2730                                      RDMA_PS_TCP, IB_QPT_RC);
2731         if (IS_ERR(cmid)) {
2732                 rc = PTR_ERR(cmid);
2733                 CERROR("Failed to create cmid for failover: %d\n", rc);
2734                 return rc;
2735         }
2736
2737         memset(&srcaddr, 0, sizeof(srcaddr));
2738         srcaddr.sin_family      = AF_INET;
2739         srcaddr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2740
2741         memset(&dstaddr, 0, sizeof(dstaddr));
2742         dstaddr.sin_family = AF_INET;
2743         rc = rdma_resolve_addr(cmid, (struct sockaddr *)&srcaddr,
2744                                (struct sockaddr *)&dstaddr, 1);
2745         if (rc != 0 || cmid->device == NULL) {
2746                 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2747                        dev->ibd_ifname, &dev->ibd_ifip,
2748                        cmid->device, rc);
2749                 rdma_destroy_id(cmid);
2750                 return rc;
2751         }
2752
2753         rc = dev->ibd_hdev->ibh_ibdev != cmid->device; /* true for failover */
2754         rdma_destroy_id(cmid);
2755         return rc;
2756 }
2757
2758 int
2759 kiblnd_dev_failover(struct kib_dev *dev, struct net *ns)
2760 {
2761         LIST_HEAD(zombie_tpo);
2762         LIST_HEAD(zombie_ppo);
2763         LIST_HEAD(zombie_fpo);
2764         struct rdma_cm_id  *cmid  = NULL;
2765         struct kib_hca_dev *hdev  = NULL;
2766         struct kib_hca_dev *old;
2767         struct ib_pd       *pd;
2768         struct kib_net *net;
2769         struct sockaddr_in  addr;
2770         unsigned long       flags;
2771         int                 rc = 0;
2772         int                 i;
2773
2774         LASSERT (*kiblnd_tunables.kib_dev_failover > 1 ||
2775                  dev->ibd_can_failover ||
2776                  dev->ibd_hdev == NULL);
2777
2778         rc = kiblnd_dev_need_failover(dev, ns);
2779         if (rc <= 0)
2780                 goto out;
2781
2782         if (dev->ibd_hdev != NULL &&
2783             dev->ibd_hdev->ibh_cmid != NULL) {
2784                 /* XXX it's not good to close old listener at here,
2785                  * because we can fail to create new listener.
2786                  * But we have to close it now, otherwise rdma_bind_addr
2787                  * will return EADDRINUSE... How crap! */
2788                 write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2789
2790                 cmid = dev->ibd_hdev->ibh_cmid;
2791                 /* make next schedule of kiblnd_dev_need_failover()
2792                  * return 1 for me */
2793                 dev->ibd_hdev->ibh_cmid  = NULL;
2794                 write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2795
2796                 rdma_destroy_id(cmid);
2797         }
2798
2799         cmid = kiblnd_rdma_create_id(ns, kiblnd_cm_callback, dev, RDMA_PS_TCP,
2800                                      IB_QPT_RC);
2801         if (IS_ERR(cmid)) {
2802                 rc = PTR_ERR(cmid);
2803                 CERROR("Failed to create cmid for failover: %d\n", rc);
2804                 goto out;
2805         }
2806
2807         memset(&addr, 0, sizeof(addr));
2808         addr.sin_family      = AF_INET;
2809         addr.sin_addr.s_addr = (__force u32)htonl(dev->ibd_ifip);
2810         addr.sin_port        = htons(*kiblnd_tunables.kib_service);
2811
2812         /* Bind to failover device or port */
2813         rc = rdma_bind_addr(cmid, (struct sockaddr *)&addr);
2814         if (rc != 0 || cmid->device == NULL) {
2815                 CERROR("Failed to bind %s:%pI4h to device(%p): %d\n",
2816                        dev->ibd_ifname, &dev->ibd_ifip,
2817                        cmid->device, rc);
2818                 rdma_destroy_id(cmid);
2819                 goto out;
2820         }
2821
2822         LIBCFS_ALLOC(hdev, sizeof(*hdev));
2823         if (hdev == NULL) {
2824                 CERROR("Failed to allocate kib_hca_dev\n");
2825                 rdma_destroy_id(cmid);
2826                 rc = -ENOMEM;
2827                 goto out;
2828         }
2829
2830         atomic_set(&hdev->ibh_ref, 1);
2831         hdev->ibh_dev   = dev;
2832         hdev->ibh_cmid  = cmid;
2833         hdev->ibh_ibdev = cmid->device;
2834         hdev->ibh_port  = cmid->port_num;
2835
2836 #ifdef HAVE_IB_ALLOC_PD_2ARGS
2837         pd = ib_alloc_pd(cmid->device, 0);
2838 #else
2839         pd = ib_alloc_pd(cmid->device);
2840 #endif
2841         if (IS_ERR(pd)) {
2842                 rc = PTR_ERR(pd);
2843                 CERROR("Can't allocate PD: %d\n", rc);
2844                 goto out;
2845         }
2846
2847         hdev->ibh_pd = pd;
2848
2849         rc = rdma_listen(cmid, 0);
2850         if (rc != 0) {
2851                 CERROR("Can't start new listener: %d\n", rc);
2852                 goto out;
2853         }
2854
2855         rc = kiblnd_hdev_get_attr(hdev);
2856         if (rc != 0) {
2857                 CERROR("Can't get device attributes: %d\n", rc);
2858                 goto out;
2859         }
2860
2861 #ifdef HAVE_IB_GET_DMA_MR
2862         rc = kiblnd_hdev_setup_mrs(hdev);
2863         if (rc != 0) {
2864                 CERROR("Can't setup device: %d\n", rc);
2865                 goto out;
2866         }
2867 #endif
2868
2869         INIT_IB_EVENT_HANDLER(&hdev->ibh_event_handler,
2870                                 hdev->ibh_ibdev, kiblnd_event_handler);
2871         ib_register_event_handler(&hdev->ibh_event_handler);
2872
2873         write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
2874
2875         old = dev->ibd_hdev;
2876         dev->ibd_hdev = hdev;   /* take over the refcount */
2877         hdev = old;
2878
2879         list_for_each_entry(net, &dev->ibd_nets, ibn_list) {
2880                 cfs_cpt_for_each(i, lnet_cpt_table()) {
2881                         kiblnd_fail_poolset(&net->ibn_tx_ps[i]->tps_poolset,
2882                                             &zombie_tpo);
2883
2884                         if (net->ibn_fmr_ps != NULL)
2885                                 kiblnd_fail_fmr_poolset(net->ibn_fmr_ps[i],
2886                                                         &zombie_fpo);
2887                 }
2888         }
2889
2890         write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
2891  out:
2892         if (!list_empty(&zombie_tpo))
2893                 kiblnd_destroy_pool_list(&zombie_tpo);
2894         if (!list_empty(&zombie_ppo))
2895                 kiblnd_destroy_pool_list(&zombie_ppo);
2896         if (!list_empty(&zombie_fpo))
2897                 kiblnd_destroy_fmr_pool_list(&zombie_fpo);
2898         if (hdev != NULL)
2899                 kiblnd_hdev_decref(hdev);
2900
2901         if (rc != 0)
2902                 dev->ibd_failed_failover++;
2903         else
2904                 dev->ibd_failed_failover = 0;
2905
2906         return rc;
2907 }
2908
2909 void
2910 kiblnd_destroy_dev(struct kib_dev *dev)
2911 {
2912         LASSERT(dev->ibd_nnets == 0);
2913         LASSERT(list_empty(&dev->ibd_nets));
2914
2915         list_del(&dev->ibd_fail_list);
2916         list_del(&dev->ibd_list);
2917
2918         if (dev->ibd_hdev != NULL)
2919                 kiblnd_hdev_decref(dev->ibd_hdev);
2920
2921         LIBCFS_FREE(dev, sizeof(*dev));
2922 }
2923
2924 static void
2925 kiblnd_base_shutdown(void)
2926 {
2927         struct kib_sched_info *sched;
2928         struct kib_peer_ni *peer_ni;
2929         int i;
2930
2931         LASSERT(list_empty(&kiblnd_data.kib_devs));
2932
2933         CDEBUG(D_MALLOC, "before LND base cleanup: kmem %lld\n",
2934                libcfs_kmem_read());
2935
2936         switch (kiblnd_data.kib_init) {
2937         default:
2938                 LBUG();
2939
2940         case IBLND_INIT_ALL:
2941         case IBLND_INIT_DATA:
2942                 hash_for_each(kiblnd_data.kib_peers, i, peer_ni, ibp_list)
2943                         LASSERT(0);
2944                 LASSERT(list_empty(&kiblnd_data.kib_connd_zombies));
2945                 LASSERT(list_empty(&kiblnd_data.kib_connd_conns));
2946                 LASSERT(list_empty(&kiblnd_data.kib_reconn_list));
2947                 LASSERT(list_empty(&kiblnd_data.kib_reconn_wait));
2948
2949                 /* flag threads to terminate; wake and wait for them to die */
2950                 kiblnd_data.kib_shutdown = 1;
2951
2952                 /* NB: we really want to stop scheduler threads net by net
2953                  * instead of the whole module, this should be improved
2954                  * with dynamic configuration LNet.
2955                  */
2956                 cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds)
2957                         wake_up_all(&sched->ibs_waitq);
2958
2959                 wake_up_all(&kiblnd_data.kib_connd_waitq);
2960                 wake_up_all(&kiblnd_data.kib_failover_waitq);
2961
2962                 wait_var_event_warning(&kiblnd_data.kib_nthreads,
2963                                        !atomic_read(&kiblnd_data.kib_nthreads),
2964                                        "Waiting for %d threads to terminate\n",
2965                                        atomic_read(&kiblnd_data.kib_nthreads));
2966                 /* fall through */
2967
2968         case IBLND_INIT_NOTHING:
2969                 break;
2970         }
2971
2972         if (kiblnd_data.kib_scheds != NULL)
2973                 cfs_percpt_free(kiblnd_data.kib_scheds);
2974
2975         CDEBUG(D_MALLOC, "after LND base cleanup: kmem %lld\n",
2976                libcfs_kmem_read());
2977
2978         kiblnd_data.kib_init = IBLND_INIT_NOTHING;
2979         module_put(THIS_MODULE);
2980 }
2981
2982 static void
2983 kiblnd_shutdown(struct lnet_ni *ni)
2984 {
2985         struct kib_net *net = ni->ni_data;
2986         rwlock_t     *g_lock = &kiblnd_data.kib_global_lock;
2987         unsigned long     flags;
2988
2989         LASSERT(kiblnd_data.kib_init == IBLND_INIT_ALL);
2990
2991         if (net == NULL)
2992                 goto out;
2993
2994         CDEBUG(D_MALLOC, "before LND net cleanup: kmem %lld\n",
2995                libcfs_kmem_read());
2996
2997         write_lock_irqsave(g_lock, flags);
2998         net->ibn_shutdown = 1;
2999         write_unlock_irqrestore(g_lock, flags);
3000
3001         switch (net->ibn_init) {
3002         default:
3003                 LBUG();
3004
3005         case IBLND_INIT_ALL:
3006                 /* nuke all existing peers within this net */
3007                 kiblnd_del_peer(ni, LNET_NID_ANY);
3008
3009                 /* Wait for all peer_ni state to clean up */
3010                 wait_var_event_warning(&net->ibn_npeers,
3011                                        atomic_read(&net->ibn_npeers) == 0,
3012                                        "%s: waiting for %d peers to disconnect\n",
3013                                        libcfs_nid2str(ni->ni_nid),
3014                                        atomic_read(&net->ibn_npeers));
3015
3016                 kiblnd_net_fini_pools(net);
3017
3018                 write_lock_irqsave(g_lock, flags);
3019                 LASSERT(net->ibn_dev->ibd_nnets > 0);
3020                 net->ibn_dev->ibd_nnets--;
3021                 list_del(&net->ibn_list);
3022                 write_unlock_irqrestore(g_lock, flags);
3023
3024                 /* fall through */
3025
3026         case IBLND_INIT_NOTHING:
3027                 LASSERT (atomic_read(&net->ibn_nconns) == 0);
3028
3029                 if (net->ibn_dev != NULL &&
3030                     net->ibn_dev->ibd_nnets == 0)
3031                         kiblnd_destroy_dev(net->ibn_dev);
3032
3033                 break;
3034         }
3035
3036         CDEBUG(D_MALLOC, "after LND net cleanup: kmem %lld\n",
3037                libcfs_kmem_read());
3038
3039         net->ibn_init = IBLND_INIT_NOTHING;
3040         ni->ni_data = NULL;
3041
3042         LIBCFS_FREE(net, sizeof(*net));
3043
3044 out:
3045         if (list_empty(&kiblnd_data.kib_devs))
3046                 kiblnd_base_shutdown();
3047 }
3048
3049 static int
3050 kiblnd_base_startup(struct net *ns)
3051 {
3052         struct kib_sched_info *sched;
3053         int rc;
3054         int i;
3055
3056         LASSERT(kiblnd_data.kib_init == IBLND_INIT_NOTHING);
3057
3058         if (!try_module_get(THIS_MODULE))
3059                 goto failed;
3060
3061         memset(&kiblnd_data, 0, sizeof(kiblnd_data)); /* zero pointers, flags etc */
3062
3063         rwlock_init(&kiblnd_data.kib_global_lock);
3064
3065         INIT_LIST_HEAD(&kiblnd_data.kib_devs);
3066         INIT_LIST_HEAD(&kiblnd_data.kib_failed_devs);
3067
3068         hash_init(kiblnd_data.kib_peers);
3069
3070         spin_lock_init(&kiblnd_data.kib_connd_lock);
3071         INIT_LIST_HEAD(&kiblnd_data.kib_connd_conns);
3072         INIT_LIST_HEAD(&kiblnd_data.kib_connd_waits);
3073         INIT_LIST_HEAD(&kiblnd_data.kib_connd_zombies);
3074         INIT_LIST_HEAD(&kiblnd_data.kib_reconn_list);
3075         INIT_LIST_HEAD(&kiblnd_data.kib_reconn_wait);
3076
3077         init_waitqueue_head(&kiblnd_data.kib_connd_waitq);
3078         init_waitqueue_head(&kiblnd_data.kib_failover_waitq);
3079
3080         kiblnd_data.kib_scheds = cfs_percpt_alloc(lnet_cpt_table(),
3081                                                   sizeof(*sched));
3082         if (kiblnd_data.kib_scheds == NULL)
3083                 goto failed;
3084
3085         cfs_percpt_for_each(sched, i, kiblnd_data.kib_scheds) {
3086                 int     nthrs;
3087
3088                 spin_lock_init(&sched->ibs_lock);
3089                 INIT_LIST_HEAD(&sched->ibs_conns);
3090                 init_waitqueue_head(&sched->ibs_waitq);
3091
3092                 nthrs = cfs_cpt_weight(lnet_cpt_table(), i);
3093                 if (*kiblnd_tunables.kib_nscheds > 0) {
3094                         nthrs = min(nthrs, *kiblnd_tunables.kib_nscheds);
3095                 } else {
3096                         /* max to half of CPUs, another half is reserved for
3097                          * upper layer modules */
3098                         nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3099                 }
3100
3101                 sched->ibs_nthreads_max = nthrs;
3102                 sched->ibs_cpt = i;
3103         }
3104
3105         kiblnd_data.kib_error_qpa.qp_state = IB_QPS_ERR;
3106
3107         /* lists/ptrs/locks initialised */
3108         kiblnd_data.kib_init = IBLND_INIT_DATA;
3109         /*****************************************************/
3110
3111         rc = kiblnd_thread_start(kiblnd_connd, NULL, "kiblnd_connd");
3112         if (rc != 0) {
3113                 CERROR("Can't spawn o2iblnd connd: %d\n", rc);
3114                 goto failed;
3115         }
3116
3117         if (*kiblnd_tunables.kib_dev_failover != 0)
3118                 rc = kiblnd_thread_start(kiblnd_failover_thread, ns,
3119                                          "kiblnd_failover");
3120
3121         if (rc != 0) {
3122                 CERROR("Can't spawn o2iblnd failover thread: %d\n", rc);
3123                 goto failed;
3124         }
3125
3126         /* flag everything initialised */
3127         kiblnd_data.kib_init = IBLND_INIT_ALL;
3128         /*****************************************************/
3129
3130         return 0;
3131
3132  failed:
3133         kiblnd_base_shutdown();
3134         return -ENETDOWN;
3135 }
3136
3137 static int
3138 kiblnd_start_schedulers(struct kib_sched_info *sched)
3139 {
3140         int     rc = 0;
3141         int     nthrs;
3142         int     i;
3143
3144         if (sched->ibs_nthreads == 0) {
3145                 if (*kiblnd_tunables.kib_nscheds > 0) {
3146                         nthrs = sched->ibs_nthreads_max;
3147                 } else {
3148                         nthrs = cfs_cpt_weight(lnet_cpt_table(),
3149                                                sched->ibs_cpt);
3150                         nthrs = min(max(IBLND_N_SCHED, nthrs >> 1), nthrs);
3151                         nthrs = min(IBLND_N_SCHED_HIGH, nthrs);
3152                 }
3153         } else {
3154                 LASSERT(sched->ibs_nthreads <= sched->ibs_nthreads_max);
3155                 /* increase one thread if there is new interface */
3156                 nthrs = (sched->ibs_nthreads < sched->ibs_nthreads_max);
3157         }
3158
3159         for (i = 0; i < nthrs; i++) {
3160                 long    id;
3161                 char    name[20];
3162                 id = KIB_THREAD_ID(sched->ibs_cpt, sched->ibs_nthreads + i);
3163                 snprintf(name, sizeof(name), "kiblnd_sd_%02ld_%02ld",
3164                          KIB_THREAD_CPT(id), KIB_THREAD_TID(id));
3165                 rc = kiblnd_thread_start(kiblnd_scheduler, (void *)id, name);
3166                 if (rc == 0)
3167                         continue;
3168
3169                 CERROR("Can't spawn thread %d for scheduler[%d]: %d\n",
3170                        sched->ibs_cpt, sched->ibs_nthreads + i, rc);
3171                 break;
3172         }
3173
3174         sched->ibs_nthreads += i;
3175         return rc;
3176 }
3177
3178 static int kiblnd_dev_start_threads(struct kib_dev *dev, bool newdev, u32 *cpts,
3179                                     int ncpts)
3180 {
3181         int     cpt;
3182         int     rc;
3183         int     i;
3184
3185         for (i = 0; i < ncpts; i++) {
3186                 struct kib_sched_info *sched;
3187
3188                 cpt = (cpts == NULL) ? i : cpts[i];
3189                 sched = kiblnd_data.kib_scheds[cpt];
3190
3191                 if (!newdev && sched->ibs_nthreads > 0)
3192                         continue;
3193
3194                 rc = kiblnd_start_schedulers(kiblnd_data.kib_scheds[cpt]);
3195                 if (rc != 0) {
3196                         CERROR("Failed to start scheduler threads for %s\n",
3197                                dev->ibd_ifname);
3198                         return rc;
3199                 }
3200         }
3201         return 0;
3202 }
3203
3204 static struct kib_dev *
3205 kiblnd_dev_search(char *ifname)
3206 {
3207         struct kib_dev *alias = NULL;
3208         struct kib_dev *dev;
3209         char            *colon;
3210         char            *colon2;
3211
3212         colon = strchr(ifname, ':');
3213         list_for_each_entry(dev, &kiblnd_data.kib_devs, ibd_list) {
3214                 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3215                         return dev;
3216
3217                 if (alias != NULL)
3218                         continue;
3219
3220                 colon2 = strchr(dev->ibd_ifname, ':');
3221                 if (colon != NULL)
3222                         *colon = 0;
3223                 if (colon2 != NULL)
3224                         *colon2 = 0;
3225
3226                 if (strcmp(&dev->ibd_ifname[0], ifname) == 0)
3227                         alias = dev;
3228
3229                 if (colon != NULL)
3230                         *colon = ':';
3231                 if (colon2 != NULL)
3232                         *colon2 = ':';
3233         }
3234         return alias;
3235 }
3236
3237 static int
3238 kiblnd_startup(struct lnet_ni *ni)
3239 {
3240         char *ifname = NULL;
3241         struct lnet_inetdev *ifaces = NULL;
3242         struct kib_dev *ibdev = NULL;
3243         struct kib_net *net = NULL;
3244         unsigned long flags;
3245         int rc;
3246         int i;
3247         bool newdev;
3248
3249         LASSERT(ni->ni_net->net_lnd == &the_o2iblnd);
3250
3251         if (kiblnd_data.kib_init == IBLND_INIT_NOTHING) {
3252                 rc = kiblnd_base_startup(ni->ni_net_ns);
3253                 if (rc != 0)
3254                         return rc;
3255         }
3256
3257         LIBCFS_ALLOC(net, sizeof(*net));
3258         ni->ni_data = net;
3259         if (net == NULL) {
3260                 rc = -ENOMEM;
3261                 goto failed;
3262         }
3263
3264         net->ibn_ni = ni;
3265         net->ibn_incarnation = ktime_get_real_ns() / NSEC_PER_USEC;
3266
3267         kiblnd_tunables_setup(ni);
3268
3269         /*
3270          * Multi-Rail wants each secondary
3271          * IP to be treated as an unique 'struct ni' interface.
3272          */
3273         if (ni->ni_interface != NULL) {
3274                 /* Use the IPoIB interface specified in 'networks=' */
3275                 ifname = ni->ni_interface;
3276         } else {
3277                 ifname = *kiblnd_tunables.kib_default_ipif;
3278         }
3279
3280         if (strlen(ifname) >= sizeof(ibdev->ibd_ifname)) {
3281                 CERROR("IPoIB interface name too long: %s\n", ifname);
3282                 rc = -E2BIG;
3283                 goto failed;
3284         }
3285
3286         rc = lnet_inet_enumerate(&ifaces, ni->ni_net_ns);
3287         if (rc < 0)
3288                 goto failed;
3289
3290         for (i = 0; i < rc; i++) {
3291                 if (strcmp(ifname, ifaces[i].li_name) == 0)
3292                         break;
3293         }
3294
3295         if (i == rc) {
3296                 CERROR("ko2iblnd: No matching interfaces\n");
3297                 rc = -ENOENT;
3298                 goto failed;
3299         }
3300
3301         ibdev = kiblnd_dev_search(ifname);
3302         newdev = ibdev == NULL;
3303         /* hmm...create kib_dev even for alias */
3304         if (ibdev == NULL || strcmp(&ibdev->ibd_ifname[0], ifname) != 0) {
3305                 LIBCFS_ALLOC(ibdev, sizeof(*ibdev));
3306                 if (!ibdev) {
3307                         rc = -ENOMEM;
3308                         goto failed;
3309                 }
3310
3311                 ibdev->ibd_ifip = ifaces[i].li_ipaddr;
3312                 strlcpy(ibdev->ibd_ifname, ifaces[i].li_name,
3313                         sizeof(ibdev->ibd_ifname));
3314                 ibdev->ibd_can_failover = !!(ifaces[i].li_flags & IFF_MASTER);
3315
3316                 INIT_LIST_HEAD(&ibdev->ibd_nets);
3317                 INIT_LIST_HEAD(&ibdev->ibd_list); /* not yet in kib_devs */
3318                 INIT_LIST_HEAD(&ibdev->ibd_fail_list);
3319
3320                 /* initialize the device */
3321                 rc = kiblnd_dev_failover(ibdev, ni->ni_net_ns);
3322                 if (rc) {
3323                         CERROR("ko2iblnd: Can't initialize device: rc = %d\n",
3324                                rc);
3325                         goto failed;
3326                 }
3327
3328                 list_add_tail(&ibdev->ibd_list, &kiblnd_data.kib_devs);
3329         }
3330
3331         net->ibn_dev = ibdev;
3332         ni->ni_nid = LNET_MKNID(LNET_NIDNET(ni->ni_nid), ibdev->ibd_ifip);
3333
3334         ni->ni_dev_cpt = ifaces[i].li_cpt;
3335
3336         rc = kiblnd_dev_start_threads(ibdev, newdev, ni->ni_cpts, ni->ni_ncpts);
3337         if (rc != 0)
3338                 goto failed;
3339
3340         rc = kiblnd_net_init_pools(net, ni, ni->ni_cpts, ni->ni_ncpts);
3341         if (rc != 0) {
3342                 CERROR("Failed to initialize NI pools: %d\n", rc);
3343                 goto failed;
3344         }
3345
3346         write_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
3347         ibdev->ibd_nnets++;
3348         list_add_tail(&net->ibn_list, &ibdev->ibd_nets);
3349         /* for health check */
3350         if (ibdev->ibd_hdev->ibh_state == IBLND_DEV_PORT_DOWN)
3351                 kiblnd_set_ni_fatal_on(ibdev->ibd_hdev, 1);
3352         write_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
3353
3354         net->ibn_init = IBLND_INIT_ALL;
3355
3356         return 0;
3357
3358 failed:
3359         if (net != NULL && net->ibn_dev == NULL && ibdev != NULL)
3360                 kiblnd_destroy_dev(ibdev);
3361
3362         kfree(ifaces);
3363         kiblnd_shutdown(ni);
3364
3365         CDEBUG(D_NET, "Configuration of device %s failed: rc = %d\n",
3366                ifname ? ifname : "", rc);
3367
3368         return -ENETDOWN;
3369 }
3370
3371 static const struct lnet_lnd the_o2iblnd = {
3372         .lnd_type       = O2IBLND,
3373         .lnd_startup    = kiblnd_startup,
3374         .lnd_shutdown   = kiblnd_shutdown,
3375         .lnd_ctl        = kiblnd_ctl,
3376         .lnd_send       = kiblnd_send,
3377         .lnd_recv       = kiblnd_recv,
3378 };
3379
3380 static void ko2inlnd_assert_wire_constants(void)
3381 {
3382         BUILD_BUG_ON(IBLND_MSG_MAGIC != 0x0be91b91);
3383         BUILD_BUG_ON(IBLND_MSG_VERSION_1 != 0x11);
3384         BUILD_BUG_ON(IBLND_MSG_VERSION_2 != 0x12);
3385         BUILD_BUG_ON(IBLND_MSG_VERSION != IBLND_MSG_VERSION_2);
3386
3387         BUILD_BUG_ON(IBLND_MSG_CONNREQ != 0xc0);
3388         BUILD_BUG_ON(IBLND_MSG_CONNACK != 0xc1);
3389         BUILD_BUG_ON(IBLND_MSG_NOOP != 0xd0);
3390         BUILD_BUG_ON(IBLND_MSG_IMMEDIATE != 0xd1);
3391         BUILD_BUG_ON(IBLND_MSG_PUT_REQ != 0xd2);
3392         BUILD_BUG_ON(IBLND_MSG_PUT_NAK != 0xd3);
3393         BUILD_BUG_ON(IBLND_MSG_PUT_ACK != 0xd4);
3394         BUILD_BUG_ON(IBLND_MSG_PUT_DONE != 0xd5);
3395         BUILD_BUG_ON(IBLND_MSG_GET_REQ != 0xd6);
3396         BUILD_BUG_ON(IBLND_MSG_GET_DONE != 0xd7);
3397
3398         BUILD_BUG_ON(IBLND_REJECT_CONN_RACE != 1);
3399         BUILD_BUG_ON(IBLND_REJECT_NO_RESOURCES != 2);
3400         BUILD_BUG_ON(IBLND_REJECT_FATAL != 3);
3401         BUILD_BUG_ON(IBLND_REJECT_CONN_UNCOMPAT != 4);
3402         BUILD_BUG_ON(IBLND_REJECT_CONN_STALE != 5);
3403         BUILD_BUG_ON(IBLND_REJECT_RDMA_FRAGS != 6);
3404         BUILD_BUG_ON(IBLND_REJECT_MSG_QUEUE_SIZE != 7);
3405         BUILD_BUG_ON(IBLND_REJECT_INVALID_SRV_ID != 8);
3406
3407         BUILD_BUG_ON((int)sizeof(struct kib_connparams) != 8);
3408         BUILD_BUG_ON((int)offsetof(struct kib_connparams, ibcp_queue_depth) != 0);
3409         BUILD_BUG_ON((int)sizeof(((struct kib_connparams *)0)->ibcp_queue_depth) != 2);
3410         BUILD_BUG_ON((int)offsetof(struct kib_connparams, ibcp_max_frags) != 2);
3411         BUILD_BUG_ON((int)sizeof(((struct kib_connparams *)0)->ibcp_max_frags) != 2);
3412         BUILD_BUG_ON((int)offsetof(struct kib_connparams, ibcp_max_msg_size) != 4);
3413         BUILD_BUG_ON((int)sizeof(((struct kib_connparams *)0)->ibcp_max_msg_size) != 4);
3414
3415         BUILD_BUG_ON((int)sizeof(struct kib_immediate_msg) != 72);
3416         BUILD_BUG_ON((int)offsetof(struct kib_immediate_msg, ibim_hdr) != 0);
3417         BUILD_BUG_ON((int)sizeof(((struct kib_immediate_msg *)0)->ibim_hdr) != 72);
3418         BUILD_BUG_ON((int)offsetof(struct kib_immediate_msg, ibim_payload) != 72);
3419         BUILD_BUG_ON((int)sizeof(((struct kib_immediate_msg *)0)->ibim_payload) != 0);
3420
3421         BUILD_BUG_ON((int)sizeof(struct kib_rdma_frag) != 12);
3422         BUILD_BUG_ON((int)offsetof(struct kib_rdma_frag, rf_nob) != 0);
3423         BUILD_BUG_ON((int)sizeof(((struct kib_rdma_frag *)0)->rf_nob) != 4);
3424         BUILD_BUG_ON((int)offsetof(struct kib_rdma_frag, rf_addr) != 4);
3425         BUILD_BUG_ON((int)sizeof(((struct kib_rdma_frag *)0)->rf_addr) != 8);
3426
3427         BUILD_BUG_ON((int)sizeof(struct kib_rdma_desc) != 8);
3428         BUILD_BUG_ON((int)offsetof(struct kib_rdma_desc, rd_key) != 0);
3429         BUILD_BUG_ON((int)sizeof(((struct kib_rdma_desc *)0)->rd_key) != 4);
3430         BUILD_BUG_ON((int)offsetof(struct kib_rdma_desc, rd_nfrags) != 4);
3431         BUILD_BUG_ON((int)sizeof(((struct kib_rdma_desc *)0)->rd_nfrags) != 4);
3432         BUILD_BUG_ON((int)offsetof(struct kib_rdma_desc, rd_frags) != 8);
3433         BUILD_BUG_ON((int)sizeof(((struct kib_rdma_desc *)0)->rd_frags) != 0);
3434
3435         BUILD_BUG_ON((int)sizeof(struct kib_putreq_msg) != 80);
3436         BUILD_BUG_ON((int)offsetof(struct kib_putreq_msg, ibprm_hdr) != 0);
3437         BUILD_BUG_ON((int)sizeof(((struct kib_putreq_msg *)0)->ibprm_hdr) != 72);
3438         BUILD_BUG_ON((int)offsetof(struct kib_putreq_msg, ibprm_cookie) != 72);
3439         BUILD_BUG_ON((int)sizeof(((struct kib_putreq_msg *)0)->ibprm_cookie) != 8);
3440
3441         BUILD_BUG_ON((int)sizeof(struct kib_putack_msg) != 24);
3442         BUILD_BUG_ON((int)offsetof(struct kib_putack_msg, ibpam_src_cookie) != 0);
3443         BUILD_BUG_ON((int)sizeof(((struct kib_putack_msg *)0)->ibpam_src_cookie) != 8);
3444         BUILD_BUG_ON((int)offsetof(struct kib_putack_msg, ibpam_dst_cookie) != 8);
3445         BUILD_BUG_ON((int)sizeof(((struct kib_putack_msg *)0)->ibpam_dst_cookie) != 8);
3446         BUILD_BUG_ON((int)offsetof(struct kib_putack_msg, ibpam_rd) != 16);
3447         BUILD_BUG_ON((int)sizeof(((struct kib_putack_msg *)0)->ibpam_rd) != 8);
3448
3449         BUILD_BUG_ON((int)sizeof(struct kib_get_msg) != 88);
3450         BUILD_BUG_ON((int)offsetof(struct kib_get_msg, ibgm_hdr) != 0);
3451         BUILD_BUG_ON((int)sizeof(((struct kib_get_msg *)0)->ibgm_hdr) != 72);
3452         BUILD_BUG_ON((int)offsetof(struct kib_get_msg, ibgm_cookie) != 72);
3453         BUILD_BUG_ON((int)sizeof(((struct kib_get_msg *)0)->ibgm_cookie) != 8);
3454         BUILD_BUG_ON((int)offsetof(struct kib_get_msg, ibgm_rd) != 80);
3455         BUILD_BUG_ON((int)sizeof(((struct kib_get_msg *)0)->ibgm_rd) != 8);
3456
3457         BUILD_BUG_ON((int)sizeof(struct kib_completion_msg) != 12);
3458         BUILD_BUG_ON((int)offsetof(struct kib_completion_msg, ibcm_cookie) != 0);
3459         BUILD_BUG_ON((int)sizeof(((struct kib_completion_msg *)0)->ibcm_cookie) != 8);
3460         BUILD_BUG_ON((int)offsetof(struct kib_completion_msg, ibcm_status) != 8);
3461         BUILD_BUG_ON((int)sizeof(((struct kib_completion_msg *)0)->ibcm_status) != 4);
3462
3463         /* Checks for struct kib_msg */
3464         //BUILD_BUG_ON((int)sizeof(struct kib_msg) != 12);
3465         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_magic) != 0);
3466         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_magic) != 4);
3467         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_version) != 4);
3468         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_version) != 2);
3469         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_type) != 6);
3470         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_type) != 1);
3471         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_credits) != 7);
3472         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_credits) != 1);
3473         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_nob) != 8);
3474         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_nob) != 4);
3475         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_cksum) != 12);
3476         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_cksum) != 4);
3477         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_srcnid) != 16);
3478         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_srcnid) != 8);
3479         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_srcstamp) != 24);
3480         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_srcstamp) != 8);
3481         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_dstnid) != 32);
3482         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_dstnid) != 8);
3483         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_dststamp) != 40);
3484         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_dststamp) != 8);
3485
3486         /* Connparams */
3487         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.connparams.ibcp_queue_depth) != 48);
3488         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.connparams.ibcp_queue_depth) != 2);
3489         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.connparams.ibcp_max_frags) != 50);
3490         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.connparams.ibcp_max_frags) != 2);
3491         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.connparams.ibcp_max_msg_size) != 52);
3492         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.connparams.ibcp_max_msg_size) != 4);
3493
3494         /* Immediate message */
3495         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.immediate.ibim_hdr) != 48);
3496         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.immediate.ibim_hdr) != 72);
3497         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.immediate.ibim_payload) != 120);
3498         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.immediate.ibim_payload) != 0);
3499
3500         /* PUT req message */
3501         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putreq.ibprm_hdr) != 48);
3502         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putreq.ibprm_hdr) != 72);
3503         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putreq.ibprm_cookie) != 120);
3504         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putreq.ibprm_cookie) != 8);
3505
3506         /* Put ACK */
3507         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putack.ibpam_src_cookie) != 48);
3508         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putack.ibpam_src_cookie) != 8);
3509         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putack.ibpam_dst_cookie) != 56);
3510         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putack.ibpam_dst_cookie) != 8);
3511         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.putack.ibpam_rd) != 64);
3512         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.putack.ibpam_rd) != 8);
3513
3514         /* GET message */
3515         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.get.ibgm_hdr) != 48);
3516         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.get.ibgm_hdr) != 72);
3517         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.get.ibgm_cookie) != 120);
3518         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.get.ibgm_cookie) != 8);
3519         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.get.ibgm_rd) != 128);
3520         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.get.ibgm_rd) != 8);
3521
3522         /* Completion message */
3523         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.completion.ibcm_cookie) != 48);
3524         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.completion.ibcm_cookie) != 8);
3525         BUILD_BUG_ON((int)offsetof(struct kib_msg, ibm_u.completion.ibcm_status) != 56);
3526         BUILD_BUG_ON((int)sizeof(((struct kib_msg *)0)->ibm_u.completion.ibcm_status) != 4);
3527
3528         /* Sanity checks */
3529         BUILD_BUG_ON(sizeof(struct kib_msg) > IBLND_MSG_SIZE);
3530         BUILD_BUG_ON(offsetof(struct kib_msg,
3531                      ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) >
3532                      IBLND_MSG_SIZE);
3533         BUILD_BUG_ON(offsetof(struct kib_msg,
3534                      ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS]) >
3535                      IBLND_MSG_SIZE);
3536 }
3537
3538 static void __exit ko2iblnd_exit(void)
3539 {
3540         lnet_unregister_lnd(&the_o2iblnd);
3541 }
3542
3543 static int __init ko2iblnd_init(void)
3544 {
3545         int rc;
3546
3547         ko2inlnd_assert_wire_constants();
3548
3549         rc = kiblnd_tunables_init();
3550         if (rc != 0)
3551                 return rc;
3552
3553         lnet_register_lnd(&the_o2iblnd);
3554
3555         return 0;
3556 }
3557
3558 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
3559 MODULE_DESCRIPTION("OpenIB gen2 LNet Network Driver");
3560 MODULE_VERSION("2.8.0");
3561 MODULE_LICENSE("GPL");
3562
3563 module_init(ko2iblnd_init);
3564 module_exit(ko2iblnd_exit);