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