drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.h

   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.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lnet/klnds/o2iblnd/o2iblnd.h
  37  *
  38  * Author: Eric Barton <eric@bartonsoftware.com>
  39  */
  40
  41 #include <linux/module.h>
  42 #include <linux/kernel.h>
  43 #include <linux/mm.h>
  44 #include <linux/string.h>
  45 #include <linux/stat.h>
  46 #include <linux/errno.h>
  47 #include <linux/unistd.h>
  48 #include <linux/uio.h>
  49 #include <linux/uaccess.h>
  50
  51 #include <linux/io.h>
  52
  53 #include <linux/fs.h>
  54 #include <linux/file.h>
  55 #include <linux/list.h>
  56 #include <linux/kmod.h>
  57 #include <linux/sysctl.h>
  58 #include <linux/pci.h>
  59
  60 #include <net/sock.h>
  61 #include <linux/in.h>
  62
  63 #define DEBUG_SUBSYSTEM S_LND
  64
  65 #include "../../../include/linux/libcfs/libcfs.h"
  66 #include "../../../include/linux/lnet/lnet.h"
  67 #include "../../../include/linux/lnet/lib-lnet.h"
  68
  69 #include <rdma/rdma_cm.h>
  70 #include <rdma/ib_cm.h>
  71 #include <rdma/ib_verbs.h>
  72 #include <rdma/ib_fmr_pool.h>
  73
  74 #define IBLND_PEER_HASH_SIZE            101     /* # peer lists */
  75 /* # scheduler loops before reschedule */
  76 #define IBLND_RESCHED                   100
  77
  78 #define IBLND_N_SCHED                   2
  79 #define IBLND_N_SCHED_HIGH              4
  80
  81 typedef struct {
  82         int          *kib_dev_failover;      /* HCA failover */
  83         unsigned int *kib_service;           /* IB service number */
  84         int          *kib_min_reconnect_interval; /* first failed connection
  85                                                    * retry... */
  86         int          *kib_max_reconnect_interval; /* ...exponentially increasing
  87                                                    * to this */
  88         int          *kib_cksum;             /* checksum kib_msg_t? */
  89         int          *kib_timeout;           /* comms timeout (seconds) */
  90         int          *kib_keepalive;         /* keepalive timeout (seconds) */
  91         int          *kib_ntx;               /* # tx descs */
  92         int          *kib_credits;           /* # concurrent sends */
  93         int          *kib_peertxcredits;     /* # concurrent sends to 1 peer */
  94         int          *kib_peerrtrcredits;    /* # per-peer router buffer
  95                                               * credits */
  96         int          *kib_peercredits_hiw;   /* # when eagerly to return
  97                                               * credits */
  98         int          *kib_peertimeout;       /* seconds to consider peer dead */
  99         char         **kib_default_ipif;     /* default IPoIB interface */
 100         int          *kib_retry_count;
 101         int          *kib_rnr_retry_count;
 102         int          *kib_concurrent_sends;  /* send work queue sizing */
 103         int          *kib_ib_mtu;            /* IB MTU */
 104         int          *kib_map_on_demand;     /* map-on-demand if RD has more
 105                                               * fragments than this value, 0
 106                                               * disable map-on-demand */
 107         int          *kib_fmr_pool_size;     /* # FMRs in pool */
 108         int          *kib_fmr_flush_trigger; /* When to trigger FMR flush */
 109         int          *kib_fmr_cache;         /* enable FMR pool cache? */
 110         int          *kib_require_priv_port; /* accept only privileged ports */
 111         int          *kib_use_priv_port;     /* use privileged port for active
 112                                               * connect */
 113         int          *kib_nscheds;           /* # threads on each CPT */
 114 } kib_tunables_t;
 115
 116 extern kib_tunables_t  kiblnd_tunables;
 117
 118 #define IBLND_MSG_QUEUE_SIZE_V1   8 /* V1 only : # messages/RDMAs in-flight */
 119 #define IBLND_CREDIT_HIGHWATER_V1 7 /* V1 only : when eagerly to return credits */
 120
 121 #define IBLND_CREDITS_DEFAULT     8 /* default # of peer credits */
 122 #define IBLND_CREDITS_MAX         ((typeof(((kib_msg_t *) 0)->ibm_credits)) - 1)  /* Max # of peer credits */
 123
 124 #define IBLND_MSG_QUEUE_SIZE(v)    ((v) == IBLND_MSG_VERSION_1 ? \
 125                                      IBLND_MSG_QUEUE_SIZE_V1 :   \
 126                                      *kiblnd_tunables.kib_peertxcredits) /* # messages/RDMAs in-flight */
 127 #define IBLND_CREDITS_HIGHWATER(v) ((v) == IBLND_MSG_VERSION_1 ? \
 128                                      IBLND_CREDIT_HIGHWATER_V1 : \
 129                                      *kiblnd_tunables.kib_peercredits_hiw) /* when eagerly to return credits */
 130
 131 #define kiblnd_rdma_create_id(cb, dev, ps, qpt) rdma_create_id(&init_net, \
 132                                                                cb, dev, \
 133                                                                ps, qpt)
 134
 135 static inline int
 136 kiblnd_concurrent_sends_v1(void)
 137 {
 138         if (*kiblnd_tunables.kib_concurrent_sends > IBLND_MSG_QUEUE_SIZE_V1 * 2)
 139                 return IBLND_MSG_QUEUE_SIZE_V1 * 2;
 140
 141         if (*kiblnd_tunables.kib_concurrent_sends < IBLND_MSG_QUEUE_SIZE_V1 / 2)
 142                 return IBLND_MSG_QUEUE_SIZE_V1 / 2;
 143
 144         return *kiblnd_tunables.kib_concurrent_sends;
 145 }
 146
 147 #define IBLND_CONCURRENT_SENDS(v)  ((v) == IBLND_MSG_VERSION_1 ? \
 148                                      kiblnd_concurrent_sends_v1() : \
 149                                      *kiblnd_tunables.kib_concurrent_sends)
 150 /* 2 OOB shall suffice for 1 keepalive and 1 returning credits */
 151 #define IBLND_OOB_CAPABLE(v)       ((v) != IBLND_MSG_VERSION_1)
 152 #define IBLND_OOB_MSGS(v)          (IBLND_OOB_CAPABLE(v) ? 2 : 0)
 153
 154 #define IBLND_MSG_SIZE        (4<<10)            /* max size of queued messages (inc hdr) */
 155 #define IBLND_MAX_RDMA_FRAGS     LNET_MAX_IOV      /* max # of fragments supported */
 156 #define IBLND_CFG_RDMA_FRAGS       (*kiblnd_tunables.kib_map_on_demand != 0 ? \
 157                                     *kiblnd_tunables.kib_map_on_demand :      \
 158                                      IBLND_MAX_RDMA_FRAGS)  /* max # of fragments configured by user */
 159 #define IBLND_RDMA_FRAGS(v)     ((v) == IBLND_MSG_VERSION_1 ? \
 160                                      IBLND_MAX_RDMA_FRAGS : IBLND_CFG_RDMA_FRAGS)
 161
 162 /************************/
 163 /* derived constants... */
 164 /* Pools (shared by connections on each CPT) */
 165 /* These pools can grow at runtime, so don't need give a very large value */
 166 #define IBLND_TX_POOL                   256
 167 #define IBLND_FMR_POOL                  256
 168 #define IBLND_FMR_POOL_FLUSH            192
 169
 170 /* TX messages (shared by all connections) */
 171 #define IBLND_TX_MSGS()     (*kiblnd_tunables.kib_ntx)
 172
 173 /* RX messages (per connection) */
 174 #define IBLND_RX_MSGS(v)            (IBLND_MSG_QUEUE_SIZE(v) * 2 + IBLND_OOB_MSGS(v))
 175 #define IBLND_RX_MSG_BYTES(v)       (IBLND_RX_MSGS(v) * IBLND_MSG_SIZE)
 176 #define IBLND_RX_MSG_PAGES(v)      ((IBLND_RX_MSG_BYTES(v) + PAGE_SIZE - 1) / PAGE_SIZE)
 177
 178 /* WRs and CQEs (per connection) */
 179 #define IBLND_RECV_WRS(v)           IBLND_RX_MSGS(v)
 180 #define IBLND_SEND_WRS(v)         ((IBLND_RDMA_FRAGS(v) + 1) * IBLND_CONCURRENT_SENDS(v))
 181 #define IBLND_CQ_ENTRIES(v)      (IBLND_RECV_WRS(v) + IBLND_SEND_WRS(v))
 182
 183 struct kib_hca_dev;
 184
 185 /* o2iblnd can run over aliased interface */
 186 #ifdef IFALIASZ
 187 #define KIB_IFNAME_SIZE       IFALIASZ
 188 #else
 189 #define KIB_IFNAME_SIZE       256
 190 #endif
 191
 192 typedef struct {
 193         struct list_head   ibd_list;            /* chain on kib_devs */
 194         struct list_head   ibd_fail_list;       /* chain on kib_failed_devs */
 195         __u32              ibd_ifip;            /* IPoIB interface IP */
 196
 197         /* IPoIB interface name */
 198         char               ibd_ifname[KIB_IFNAME_SIZE];
 199         int                ibd_nnets;           /* # nets extant */
 200
 201         unsigned long      ibd_next_failover;
 202         int                ibd_failed_failover; /* # failover failures */
 203         unsigned int       ibd_failover;        /* failover in progress */
 204         unsigned int       ibd_can_failover;    /* IPoIB interface is a bonding
 205                                                  * master */
 206         struct list_head   ibd_nets;
 207         struct kib_hca_dev *ibd_hdev;
 208 } kib_dev_t;
 209
 210 typedef struct kib_hca_dev {
 211         struct rdma_cm_id  *ibh_cmid;           /* listener cmid */
 212         struct ib_device   *ibh_ibdev;          /* IB device */
 213         int                ibh_page_shift;      /* page shift of current HCA */
 214         int                ibh_page_size;       /* page size of current HCA */
 215         __u64              ibh_page_mask;       /* page mask of current HCA */
 216         int                ibh_mr_shift;        /* bits shift of max MR size */
 217         __u64              ibh_mr_size;         /* size of MR */
 218         int                ibh_nmrs;            /* # of global MRs */
 219         struct ib_mr       **ibh_mrs;           /* global MR */
 220         struct ib_pd       *ibh_pd;             /* PD */
 221         kib_dev_t          *ibh_dev;            /* owner */
 222         atomic_t           ibh_ref;             /* refcount */
 223 } kib_hca_dev_t;
 224
 225 /** # of seconds to keep pool alive */
 226 #define IBLND_POOL_DEADLINE     300
 227 /** # of seconds to retry if allocation failed */
 228 #define IBLND_POOL_RETRY        1
 229
 230 typedef struct {
 231         int                ibp_npages;          /* # pages */
 232         struct page        *ibp_pages[0];       /* page array */
 233 } kib_pages_t;
 234
 235 struct kib_pool;
 236 struct kib_poolset;
 237
 238 typedef int  (*kib_ps_pool_create_t)(struct kib_poolset *ps,
 239                                      int inc, struct kib_pool **pp_po);
 240 typedef void (*kib_ps_pool_destroy_t)(struct kib_pool *po);
 241 typedef void (*kib_ps_node_init_t)(struct kib_pool *po, struct list_head *node);
 242 typedef void (*kib_ps_node_fini_t)(struct kib_pool *po, struct list_head *node);
 243
 244 struct kib_net;
 245
 246 #define IBLND_POOL_NAME_LEN     32
 247
 248 typedef struct kib_poolset {
 249         spinlock_t            ps_lock;            /* serialize */
 250         struct kib_net        *ps_net;            /* network it belongs to */
 251         char                  ps_name[IBLND_POOL_NAME_LEN]; /* pool set name */
 252         struct list_head      ps_pool_list;       /* list of pools */
 253         struct list_head      ps_failed_pool_list;/* failed pool list */
 254         unsigned long         ps_next_retry;      /* time stamp for retry if
 255                                                    * failed to allocate */
 256         int                   ps_increasing;      /* is allocating new pool */
 257         int                   ps_pool_size;       /* new pool size */
 258         int                   ps_cpt;             /* CPT id */
 259
 260         kib_ps_pool_create_t  ps_pool_create;     /* create a new pool */
 261         kib_ps_pool_destroy_t ps_pool_destroy;    /* destroy a pool */
 262         kib_ps_node_init_t    ps_node_init;       /* initialize new allocated
 263                                                    * node */
 264         kib_ps_node_fini_t    ps_node_fini;       /* finalize node */
 265 } kib_poolset_t;
 266
 267 typedef struct kib_pool {
 268         struct list_head      po_list;         /* chain on pool list */
 269         struct list_head      po_free_list;    /* pre-allocated node */
 270         kib_poolset_t         *po_owner;       /* pool_set of this pool */
 271         unsigned long         po_deadline;     /* deadline of this pool */
 272         int                   po_allocated;    /* # of elements in use */
 273         int                   po_failed;       /* pool is created on failed
 274                                                 * HCA */
 275         int                   po_size;         /* # of pre-allocated elements */
 276 } kib_pool_t;
 277
 278 typedef struct {
 279         kib_poolset_t         tps_poolset;        /* pool-set */
 280         __u64                 tps_next_tx_cookie; /* cookie of TX */
 281 } kib_tx_poolset_t;
 282
 283 typedef struct {
 284         kib_pool_t            tpo_pool;           /* pool */
 285         struct kib_hca_dev    *tpo_hdev;          /* device for this pool */
 286         struct kib_tx         *tpo_tx_descs;      /* all the tx descriptors */
 287         kib_pages_t           *tpo_tx_pages;      /* premapped tx msg pages */
 288 } kib_tx_pool_t;
 289
 290 typedef struct {
 291         spinlock_t            fps_lock;            /* serialize */
 292         struct kib_net        *fps_net;            /* IB network */
 293         struct list_head      fps_pool_list;       /* FMR pool list */
 294         struct list_head      fps_failed_pool_list;/* FMR pool list */
 295         __u64                 fps_version;         /* validity stamp */
 296         int                   fps_cpt;             /* CPT id */
 297         int                   fps_pool_size;
 298         int                   fps_flush_trigger;
 299         int                   fps_increasing;      /* is allocating new pool */
 300         unsigned long         fps_next_retry;      /* time stamp for retry if
 301                                                     * failed to allocate */
 302 } kib_fmr_poolset_t;
 303
 304 typedef struct {
 305         struct list_head      fpo_list;            /* chain on pool list */
 306         struct kib_hca_dev    *fpo_hdev;           /* device for this pool */
 307         kib_fmr_poolset_t     *fpo_owner;          /* owner of this pool */
 308         struct ib_fmr_pool    *fpo_fmr_pool;       /* IB FMR pool */
 309         unsigned long         fpo_deadline;        /* deadline of this pool */
 310         int                   fpo_failed;          /* fmr pool is failed */
 311         int                   fpo_map_count;       /* # of mapped FMR */
 312 } kib_fmr_pool_t;
 313
 314 typedef struct {
 315         struct ib_pool_fmr    *fmr_pfmr;           /* IB pool fmr */
 316         kib_fmr_pool_t        *fmr_pool;           /* pool of FMR */
 317 } kib_fmr_t;
 318
 319 typedef struct kib_net {
 320         struct list_head      ibn_list;       /* chain on kib_dev_t::ibd_nets */
 321         __u64                 ibn_incarnation;/* my epoch */
 322         int                   ibn_init;       /* initialisation state */
 323         int                   ibn_shutdown;   /* shutting down? */
 324
 325         atomic_t              ibn_npeers;     /* # peers extant */
 326         atomic_t              ibn_nconns;     /* # connections extant */
 327
 328         kib_tx_poolset_t      **ibn_tx_ps;    /* tx pool-set */
 329         kib_fmr_poolset_t     **ibn_fmr_ps;   /* fmr pool-set */
 330
 331         kib_dev_t             *ibn_dev;       /* underlying IB device */
 332 } kib_net_t;
 333
 334 #define KIB_THREAD_SHIFT                16
 335 #define KIB_THREAD_ID(cpt, tid)         ((cpt) << KIB_THREAD_SHIFT | (tid))
 336 #define KIB_THREAD_CPT(id)              ((id) >> KIB_THREAD_SHIFT)
 337 #define KIB_THREAD_TID(id)              ((id) & ((1UL << KIB_THREAD_SHIFT) - 1))
 338
 339 struct kib_sched_info {
 340         spinlock_t         ibs_lock;     /* serialise */
 341         wait_queue_head_t  ibs_waitq;    /* schedulers sleep here */
 342         struct list_head   ibs_conns;    /* conns to check for rx completions */
 343         int                ibs_nthreads; /* number of scheduler threads */
 344         int                ibs_nthreads_max; /* max allowed scheduler threads */
 345         int                ibs_cpt;      /* CPT id */
 346 };
 347
 348 typedef struct {
 349         int                   kib_init;           /* initialisation state */
 350         int                   kib_shutdown;       /* shut down? */
 351         struct list_head      kib_devs;           /* IB devices extant */
 352         struct list_head      kib_failed_devs;    /* list head of failed
 353                                                    * devices */
 354         wait_queue_head_t     kib_failover_waitq; /* schedulers sleep here */
 355         atomic_t              kib_nthreads;       /* # live threads */
 356         rwlock_t              kib_global_lock;    /* stabilize net/dev/peer/conn
 357                                                    * ops */
 358         struct list_head      *kib_peers;         /* hash table of all my known
 359                                                    * peers */
 360         int                   kib_peer_hash_size; /* size of kib_peers */
 361         void                  *kib_connd;         /* the connd task
 362                                                    * (serialisation assertions)
 363                                                    */
 364         struct list_head      kib_connd_conns;    /* connections to
 365                                                    * setup/teardown */
 366         struct list_head      kib_connd_zombies;  /* connections with zero
 367                                                    * refcount */
 368         wait_queue_head_t     kib_connd_waitq;    /* connection daemon sleeps
 369                                                    * here */
 370         spinlock_t            kib_connd_lock;     /* serialise */
 371         struct ib_qp_attr     kib_error_qpa;      /* QP->ERROR */
 372         struct kib_sched_info **kib_scheds;       /* percpt data for schedulers
 373                                                    */
 374 } kib_data_t;
 375
 376 #define IBLND_INIT_NOTHING 0
 377 #define IBLND_INIT_DATA    1
 378 #define IBLND_INIT_ALL     2
 379
 380 /************************************************************************
 381  * IB Wire message format.
 382  * These are sent in sender's byte order (i.e. receiver flips).
 383  */
 384
 385 typedef struct kib_connparams {
 386         __u16        ibcp_queue_depth;
 387         __u16        ibcp_max_frags;
 388         __u32        ibcp_max_msg_size;
 389 } WIRE_ATTR kib_connparams_t;
 390
 391 typedef struct {
 392         lnet_hdr_t   ibim_hdr;        /* portals header */
 393         char         ibim_payload[0]; /* piggy-backed payload */
 394 } WIRE_ATTR kib_immediate_msg_t;
 395
 396 typedef struct {
 397         __u32        rf_nob;          /* # bytes this frag */
 398         __u64        rf_addr;         /* CAVEAT EMPTOR: misaligned!! */
 399 } WIRE_ATTR kib_rdma_frag_t;
 400
 401 typedef struct {
 402         __u32           rd_key;       /* local/remote key */
 403         __u32           rd_nfrags;    /* # fragments */
 404         kib_rdma_frag_t rd_frags[0];  /* buffer frags */
 405 } WIRE_ATTR kib_rdma_desc_t;
 406
 407 typedef struct {
 408         lnet_hdr_t      ibprm_hdr;    /* portals header */
 409         __u64           ibprm_cookie; /* opaque completion cookie */
 410 } WIRE_ATTR kib_putreq_msg_t;
 411
 412 typedef struct {
 413         __u64           ibpam_src_cookie; /* reflected completion cookie */
 414         __u64           ibpam_dst_cookie; /* opaque completion cookie */
 415         kib_rdma_desc_t ibpam_rd;         /* sender's sink buffer */
 416 } WIRE_ATTR kib_putack_msg_t;
 417
 418 typedef struct {
 419         lnet_hdr_t      ibgm_hdr;     /* portals header */
 420         __u64           ibgm_cookie;  /* opaque completion cookie */
 421         kib_rdma_desc_t ibgm_rd;      /* rdma descriptor */
 422 } WIRE_ATTR kib_get_msg_t;
 423
 424 typedef struct {
 425         __u64           ibcm_cookie;  /* opaque completion cookie */
 426         __s32           ibcm_status;  /* < 0 failure: >= 0 length */
 427 } WIRE_ATTR kib_completion_msg_t;
 428
 429 typedef struct {
 430         /* First 2 fields fixed FOR ALL TIME */
 431         __u32           ibm_magic;    /* I'm an ibnal message */
 432         __u16           ibm_version;  /* this is my version number */
 433
 434         __u8            ibm_type;     /* msg type */
 435         __u8            ibm_credits;  /* returned credits */
 436         __u32           ibm_nob;      /* # bytes in whole message */
 437         __u32           ibm_cksum;    /* checksum (0 == no checksum) */
 438         __u64           ibm_srcnid;   /* sender's NID */
 439         __u64           ibm_srcstamp; /* sender's incarnation */
 440         __u64           ibm_dstnid;   /* destination's NID */
 441         __u64           ibm_dststamp; /* destination's incarnation */
 442
 443         union {
 444                 kib_connparams_t     connparams;
 445                 kib_immediate_msg_t  immediate;
 446                 kib_putreq_msg_t     putreq;
 447                 kib_putack_msg_t     putack;
 448                 kib_get_msg_t        get;
 449                 kib_completion_msg_t completion;
 450         } WIRE_ATTR ibm_u;
 451 } WIRE_ATTR kib_msg_t;
 452
 453 #define IBLND_MSG_MAGIC     LNET_PROTO_IB_MAGIC /* unique magic */
 454
 455 #define IBLND_MSG_VERSION_1 0x11
 456 #define IBLND_MSG_VERSION_2 0x12
 457 #define IBLND_MSG_VERSION   IBLND_MSG_VERSION_2
 458
 459 #define IBLND_MSG_CONNREQ   0xc0        /* connection request */
 460 #define IBLND_MSG_CONNACK   0xc1        /* connection acknowledge */
 461 #define IBLND_MSG_NOOP      0xd0        /* nothing (just credits) */
 462 #define IBLND_MSG_IMMEDIATE 0xd1        /* immediate */
 463 #define IBLND_MSG_PUT_REQ   0xd2        /* putreq (src->sink) */
 464 #define IBLND_MSG_PUT_NAK   0xd3        /* completion (sink->src) */
 465 #define IBLND_MSG_PUT_ACK   0xd4        /* putack (sink->src) */
 466 #define IBLND_MSG_PUT_DONE  0xd5        /* completion (src->sink) */
 467 #define IBLND_MSG_GET_REQ   0xd6        /* getreq (sink->src) */
 468 #define IBLND_MSG_GET_DONE  0xd7        /* completion (src->sink: all OK) */
 469
 470 typedef struct {
 471         __u32            ibr_magic;       /* sender's magic */
 472         __u16            ibr_version;     /* sender's version */
 473         __u8             ibr_why;         /* reject reason */
 474         __u8             ibr_padding;     /* padding */
 475         __u64            ibr_incarnation; /* incarnation of peer */
 476         kib_connparams_t ibr_cp;          /* connection parameters */
 477 } WIRE_ATTR kib_rej_t;
 478
 479 /* connection rejection reasons */
 480 #define IBLND_REJECT_CONN_RACE      1 /* You lost connection race */
 481 #define IBLND_REJECT_NO_RESOURCES   2 /* Out of memory/conns etc */
 482 #define IBLND_REJECT_FATAL          3 /* Anything else */
 483 #define IBLND_REJECT_CONN_UNCOMPAT  4 /* incompatible version peer */
 484 #define IBLND_REJECT_CONN_STALE     5 /* stale peer */
 485 #define IBLND_REJECT_RDMA_FRAGS     6 /* Fatal: peer's rdma frags can't match
 486                                        * mine */
 487 #define IBLND_REJECT_MSG_QUEUE_SIZE 7 /* Fatal: peer's msg queue size can't
 488                                        * match mine */
 489
 490 /***********************************************************************/
 491
 492 typedef struct kib_rx                         /* receive message */
 493 {
 494         struct list_head       rx_list;       /* queue for attention */
 495         struct kib_conn        *rx_conn;      /* owning conn */
 496         int                    rx_nob;        /* # bytes received (-1 while
 497                                                * posted) */
 498         enum ib_wc_status      rx_status;     /* completion status */
 499         kib_msg_t              *rx_msg;       /* message buffer (host vaddr) */
 500         __u64                  rx_msgaddr;    /* message buffer (I/O addr) */
 501         DECLARE_PCI_UNMAP_ADDR(rx_msgunmap);  /* for dma_unmap_single() */
 502         struct ib_recv_wr      rx_wrq;        /* receive work item... */
 503         struct ib_sge          rx_sge;        /* ...and its memory */
 504 } kib_rx_t;
 505
 506 #define IBLND_POSTRX_DONT_POST    0   /* don't post */
 507 #define IBLND_POSTRX_NO_CREDIT    1   /* post: no credits */
 508 #define IBLND_POSTRX_PEER_CREDIT  2   /* post: give peer back 1 credit */
 509 #define IBLND_POSTRX_RSRVD_CREDIT 3   /* post: give myself back 1 reserved
 510                                        * credit */
 511
 512 typedef struct kib_tx                         /* transmit message */
 513 {
 514         struct list_head       tx_list;       /* queue on idle_txs ibc_tx_queue
 515                                                * etc. */
 516         kib_tx_pool_t          *tx_pool;      /* pool I'm from */
 517         struct kib_conn        *tx_conn;      /* owning conn */
 518         short                  tx_sending;    /* # tx callbacks outstanding */
 519         short                  tx_queued;     /* queued for sending */
 520         short                  tx_waiting;    /* waiting for peer */
 521         int                    tx_status;     /* LNET completion status */
 522         unsigned long          tx_deadline;   /* completion deadline */
 523         __u64                  tx_cookie;     /* completion cookie */
 524         lnet_msg_t             *tx_lntmsg[2]; /* lnet msgs to finalize on
 525                                                * completion */
 526         kib_msg_t              *tx_msg;       /* message buffer (host vaddr) */
 527         __u64                  tx_msgaddr;    /* message buffer (I/O addr) */
 528         DECLARE_PCI_UNMAP_ADDR(tx_msgunmap);  /* for dma_unmap_single() */
 529         int                    tx_nwrq;       /* # send work items */
 530         struct ib_rdma_wr      *tx_wrq;       /* send work items... */
 531         struct ib_sge          *tx_sge;       /* ...and their memory */
 532         kib_rdma_desc_t        *tx_rd;        /* rdma descriptor */
 533         int                    tx_nfrags;     /* # entries in... */
 534         struct scatterlist     *tx_frags;     /* dma_map_sg descriptor */
 535         __u64                  *tx_pages;     /* rdma phys page addrs */
 536         kib_fmr_t               fmr;          /* FMR */
 537         int                    tx_dmadir;     /* dma direction */
 538 } kib_tx_t;
 539
 540 typedef struct kib_connvars {
 541         kib_msg_t cv_msg; /* connection-in-progress variables */
 542 } kib_connvars_t;
 543
 544 typedef struct kib_conn {
 545         struct kib_sched_info *ibc_sched;           /* scheduler information */
 546         struct kib_peer       *ibc_peer;            /* owning peer */
 547         kib_hca_dev_t         *ibc_hdev;            /* HCA bound on */
 548         struct list_head      ibc_list;             /* stash on peer's conn
 549                                                      * list */
 550         struct list_head      ibc_sched_list;       /* schedule for attention */
 551         __u16                 ibc_version;          /* version of connection */
 552         __u64                 ibc_incarnation;      /* which instance of the
 553                                                      * peer */
 554         atomic_t              ibc_refcount;         /* # users */
 555         int                   ibc_state;            /* what's happening */
 556         int                   ibc_nsends_posted;    /* # uncompleted sends */
 557         int                   ibc_noops_posted;     /* # uncompleted NOOPs */
 558         int                   ibc_credits;          /* # credits I have */
 559         int                   ibc_outstanding_credits; /* # credits to return */
 560         int                   ibc_reserved_credits; /* # ACK/DONE msg credits */
 561         int                   ibc_comms_error;      /* set on comms error */
 562         unsigned int          ibc_nrx:16;           /* receive buffers owned */
 563         unsigned int          ibc_scheduled:1;      /* scheduled for attention
 564                                                      */
 565         unsigned int          ibc_ready:1;          /* CQ callback fired */
 566         unsigned long         ibc_last_send;        /* time of last send */
 567         struct list_head      ibc_connd_list;       /* link chain for
 568                                                      * kiblnd_check_conns only
 569                                                      */
 570         struct list_head      ibc_early_rxs;        /* rxs completed before
 571                                                      * ESTABLISHED */
 572         struct list_head      ibc_tx_noops;         /* IBLND_MSG_NOOPs for
 573                                                      * IBLND_MSG_VERSION_1 */
 574         struct list_head      ibc_tx_queue;         /* sends that need a credit
 575                                                      */
 576         struct list_head      ibc_tx_queue_nocred;  /* sends that don't need a
 577                                                      * credit */
 578         struct list_head      ibc_tx_queue_rsrvd;   /* sends that need to
 579                                                      * reserve an ACK/DONE msg
 580                                                      */
 581         struct list_head      ibc_active_txs;       /* active tx awaiting
 582                                                      * completion */
 583         spinlock_t            ibc_lock;             /* serialise */
 584         kib_rx_t              *ibc_rxs;             /* the rx descs */
 585         kib_pages_t           *ibc_rx_pages;        /* premapped rx msg pages */
 586
 587         struct rdma_cm_id     *ibc_cmid;            /* CM id */
 588         struct ib_cq          *ibc_cq;              /* completion queue */
 589
 590         kib_connvars_t        *ibc_connvars;        /* in-progress connection
 591                                                      * state */
 592 } kib_conn_t;
 593
 594 #define IBLND_CONN_INIT           0      /* being initialised */
 595 #define IBLND_CONN_ACTIVE_CONNECT 1      /* active sending req */
 596 #define IBLND_CONN_PASSIVE_WAIT   2      /* passive waiting for rtu */
 597 #define IBLND_CONN_ESTABLISHED    3      /* connection established */
 598 #define IBLND_CONN_CLOSING        4      /* being closed */
 599 #define IBLND_CONN_DISCONNECTED   5      /* disconnected */
 600
 601 typedef struct kib_peer {
 602         struct list_head ibp_list;        /* stash on global peer list */
 603         lnet_nid_t       ibp_nid;         /* who's on the other end(s) */
 604         lnet_ni_t        *ibp_ni;         /* LNet interface */
 605         atomic_t         ibp_refcount;    /* # users */
 606         struct list_head ibp_conns;       /* all active connections */
 607         struct list_head ibp_tx_queue;    /* msgs waiting for a conn */
 608         __u16            ibp_version;     /* version of peer */
 609         __u64            ibp_incarnation; /* incarnation of peer */
 610         int              ibp_connecting;  /* current active connection attempts
 611                                            */
 612         int              ibp_accepting;   /* current passive connection attempts
 613                                            */
 614         int              ibp_error;       /* errno on closing this peer */
 615         unsigned long    ibp_last_alive;  /* when (in jiffies) I was last alive
 616                                            */
 617 } kib_peer_t;
 618
 619 extern kib_data_t kiblnd_data;
 620
 621 void kiblnd_hdev_destroy(kib_hca_dev_t *hdev);
 622
 623 static inline void
 624 kiblnd_hdev_addref_locked(kib_hca_dev_t *hdev)
 625 {
 626         LASSERT(atomic_read(&hdev->ibh_ref) > 0);
 627         atomic_inc(&hdev->ibh_ref);
 628 }
 629
 630 static inline void
 631 kiblnd_hdev_decref(kib_hca_dev_t *hdev)
 632 {
 633         LASSERT(atomic_read(&hdev->ibh_ref) > 0);
 634         if (atomic_dec_and_test(&hdev->ibh_ref))
 635                 kiblnd_hdev_destroy(hdev);
 636 }
 637
 638 static inline int
 639 kiblnd_dev_can_failover(kib_dev_t *dev)
 640 {
 641         if (!list_empty(&dev->ibd_fail_list)) /* already scheduled */
 642                 return 0;
 643
 644         if (*kiblnd_tunables.kib_dev_failover == 0) /* disabled */
 645                 return 0;
 646
 647         if (*kiblnd_tunables.kib_dev_failover > 1) /* force failover */
 648                 return 1;
 649
 650         return dev->ibd_can_failover;
 651 }
 652
 653 #define kiblnd_conn_addref(conn)                                \
 654 do {                                                        \
 655         CDEBUG(D_NET, "conn[%p] (%d)++\n",                    \
 656                (conn), atomic_read(&(conn)->ibc_refcount)); \
 657         atomic_inc(&(conn)->ibc_refcount);                \
 658 } while (0)
 659
 660 #define kiblnd_conn_decref(conn)                                        \
 661 do {                                                                    \
 662         unsigned long flags;                                            \
 663                                                                         \
 664         CDEBUG(D_NET, "conn[%p] (%d)--\n",                              \
 665                (conn), atomic_read(&(conn)->ibc_refcount));             \
 666         LASSERT_ATOMIC_POS(&(conn)->ibc_refcount);                      \
 667         if (atomic_dec_and_test(&(conn)->ibc_refcount)) {               \
 668                 spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags);  \
 669                 list_add_tail(&(conn)->ibc_list,                        \
 670                                   &kiblnd_data.kib_connd_zombies);      \
 671                 wake_up(&kiblnd_data.kib_connd_waitq);          \
 672                 spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags);\
 673         }                                                               \
 674 } while (0)
 675
 676 #define kiblnd_peer_addref(peer)                                \
 677 do {                                                        \
 678         CDEBUG(D_NET, "peer[%p] -> %s (%d)++\n",                \
 679                (peer), libcfs_nid2str((peer)->ibp_nid),  \
 680                atomic_read(&(peer)->ibp_refcount));     \
 681         atomic_inc(&(peer)->ibp_refcount);                \
 682 } while (0)
 683
 684 #define kiblnd_peer_decref(peer)                                \
 685 do {                                                        \
 686         CDEBUG(D_NET, "peer[%p] -> %s (%d)--\n",                \
 687                (peer), libcfs_nid2str((peer)->ibp_nid),  \
 688                atomic_read(&(peer)->ibp_refcount));     \
 689         LASSERT_ATOMIC_POS(&(peer)->ibp_refcount);            \
 690         if (atomic_dec_and_test(&(peer)->ibp_refcount))     \
 691                 kiblnd_destroy_peer(peer);                    \
 692 } while (0)
 693
 694 static inline struct list_head *
 695 kiblnd_nid2peerlist(lnet_nid_t nid)
 696 {
 697         unsigned int hash =
 698                 ((unsigned int)nid) % kiblnd_data.kib_peer_hash_size;
 699
 700         return &kiblnd_data.kib_peers[hash];
 701 }
 702
 703 static inline int
 704 kiblnd_peer_active(kib_peer_t *peer)
 705 {
 706         /* Am I in the peer hash table? */
 707         return !list_empty(&peer->ibp_list);
 708 }
 709
 710 static inline kib_conn_t *
 711 kiblnd_get_conn_locked(kib_peer_t *peer)
 712 {
 713         LASSERT(!list_empty(&peer->ibp_conns));
 714
 715         /* just return the first connection */
 716         return list_entry(peer->ibp_conns.next, kib_conn_t, ibc_list);
 717 }
 718
 719 static inline int
 720 kiblnd_send_keepalive(kib_conn_t *conn)
 721 {
 722         return (*kiblnd_tunables.kib_keepalive > 0) &&
 723                 cfs_time_after(jiffies, conn->ibc_last_send +
 724                                *kiblnd_tunables.kib_keepalive*HZ);
 725 }
 726
 727 static inline int
 728 kiblnd_need_noop(kib_conn_t *conn)
 729 {
 730         LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED);
 731
 732         if (conn->ibc_outstanding_credits <
 733             IBLND_CREDITS_HIGHWATER(conn->ibc_version) &&
 734             !kiblnd_send_keepalive(conn))
 735                 return 0; /* No need to send NOOP */
 736
 737         if (IBLND_OOB_CAPABLE(conn->ibc_version)) {
 738                 if (!list_empty(&conn->ibc_tx_queue_nocred))
 739                         return 0; /* NOOP can be piggybacked */
 740
 741                 /* No tx to piggyback NOOP onto or no credit to send a tx */
 742                 return (list_empty(&conn->ibc_tx_queue) ||
 743                         conn->ibc_credits == 0);
 744         }
 745
 746         if (!list_empty(&conn->ibc_tx_noops) || /* NOOP already queued */
 747             !list_empty(&conn->ibc_tx_queue_nocred) || /* piggyback NOOP */
 748             conn->ibc_credits == 0)                 /* no credit */
 749                 return 0;
 750
 751         if (conn->ibc_credits == 1 &&      /* last credit reserved for */
 752             conn->ibc_outstanding_credits == 0) /* giving back credits */
 753                 return 0;
 754
 755         /* No tx to piggyback NOOP onto or no credit to send a tx */
 756         return (list_empty(&conn->ibc_tx_queue) || conn->ibc_credits == 1);
 757 }
 758
 759 static inline void
 760 kiblnd_abort_receives(kib_conn_t *conn)
 761 {
 762         ib_modify_qp(conn->ibc_cmid->qp,
 763                      &kiblnd_data.kib_error_qpa, IB_QP_STATE);
 764 }
 765
 766 static inline const char *
 767 kiblnd_queue2str(kib_conn_t *conn, struct list_head *q)
 768 {
 769         if (q == &conn->ibc_tx_queue)
 770                 return "tx_queue";
 771
 772         if (q == &conn->ibc_tx_queue_rsrvd)
 773                 return "tx_queue_rsrvd";
 774
 775         if (q == &conn->ibc_tx_queue_nocred)
 776                 return "tx_queue_nocred";
 777
 778         if (q == &conn->ibc_active_txs)
 779                 return "active_txs";
 780
 781         LBUG();
 782         return NULL;
 783 }
 784
 785 /* CAVEAT EMPTOR: We rely on descriptor alignment to allow us to use the
 786  * lowest bits of the work request id to stash the work item type. */
 787
 788 #define IBLND_WID_TX    0
 789 #define IBLND_WID_RDMA  1
 790 #define IBLND_WID_RX    2
 791 #define IBLND_WID_MASK  3UL
 792
 793 static inline __u64
 794 kiblnd_ptr2wreqid(void *ptr, int type)
 795 {
 796         unsigned long lptr = (unsigned long)ptr;
 797
 798         LASSERT((lptr & IBLND_WID_MASK) == 0);
 799         LASSERT((type & ~IBLND_WID_MASK) == 0);
 800         return (__u64)(lptr | type);
 801 }
 802
 803 static inline void *
 804 kiblnd_wreqid2ptr(__u64 wreqid)
 805 {
 806         return (void *)(((unsigned long)wreqid) & ~IBLND_WID_MASK);
 807 }
 808
 809 static inline int
 810 kiblnd_wreqid2type(__u64 wreqid)
 811 {
 812         return wreqid & IBLND_WID_MASK;
 813 }
 814
 815 static inline void
 816 kiblnd_set_conn_state(kib_conn_t *conn, int state)
 817 {
 818         conn->ibc_state = state;
 819         mb();
 820 }
 821
 822 static inline void
 823 kiblnd_init_msg(kib_msg_t *msg, int type, int body_nob)
 824 {
 825         msg->ibm_type = type;
 826         msg->ibm_nob  = offsetof(kib_msg_t, ibm_u) + body_nob;
 827 }
 828
 829 static inline int
 830 kiblnd_rd_size(kib_rdma_desc_t *rd)
 831 {
 832         int   i;
 833         int   size;
 834
 835         for (i = size = 0; i < rd->rd_nfrags; i++)
 836                 size += rd->rd_frags[i].rf_nob;
 837
 838         return size;
 839 }
 840
 841 static inline __u64
 842 kiblnd_rd_frag_addr(kib_rdma_desc_t *rd, int index)
 843 {
 844         return rd->rd_frags[index].rf_addr;
 845 }
 846
 847 static inline __u32
 848 kiblnd_rd_frag_size(kib_rdma_desc_t *rd, int index)
 849 {
 850         return rd->rd_frags[index].rf_nob;
 851 }
 852
 853 static inline __u32
 854 kiblnd_rd_frag_key(kib_rdma_desc_t *rd, int index)
 855 {
 856         return rd->rd_key;
 857 }
 858
 859 static inline int
 860 kiblnd_rd_consume_frag(kib_rdma_desc_t *rd, int index, __u32 nob)
 861 {
 862         if (nob < rd->rd_frags[index].rf_nob) {
 863                 rd->rd_frags[index].rf_addr += nob;
 864                 rd->rd_frags[index].rf_nob  -= nob;
 865         } else {
 866                 index++;
 867         }
 868
 869         return index;
 870 }
 871
 872 static inline int
 873 kiblnd_rd_msg_size(kib_rdma_desc_t *rd, int msgtype, int n)
 874 {
 875         LASSERT(msgtype == IBLND_MSG_GET_REQ ||
 876                 msgtype == IBLND_MSG_PUT_ACK);
 877
 878         return msgtype == IBLND_MSG_GET_REQ ?
 879                offsetof(kib_get_msg_t, ibgm_rd.rd_frags[n]) :
 880                offsetof(kib_putack_msg_t, ibpam_rd.rd_frags[n]);
 881 }
 882
 883
 884 static inline __u64
 885 kiblnd_dma_mapping_error(struct ib_device *dev, u64 dma_addr)
 886 {
 887         return ib_dma_mapping_error(dev, dma_addr);
 888 }
 889
 890 static inline __u64 kiblnd_dma_map_single(struct ib_device *dev,
 891                                           void *msg, size_t size,
 892                                           enum dma_data_direction direction)
 893 {
 894         return ib_dma_map_single(dev, msg, size, direction);
 895 }
 896
 897 static inline void kiblnd_dma_unmap_single(struct ib_device *dev,
 898                                            __u64 addr, size_t size,
 899                                           enum dma_data_direction direction)
 900 {
 901         ib_dma_unmap_single(dev, addr, size, direction);
 902 }
 903
 904 #define KIBLND_UNMAP_ADDR_SET(p, m, a)  do {} while (0)
 905 #define KIBLND_UNMAP_ADDR(p, m, a)      (a)
 906
 907 static inline int kiblnd_dma_map_sg(struct ib_device *dev,
 908                                     struct scatterlist *sg, int nents,
 909                                     enum dma_data_direction direction)
 910 {
 911         return ib_dma_map_sg(dev, sg, nents, direction);
 912 }
 913
 914 static inline void kiblnd_dma_unmap_sg(struct ib_device *dev,
 915                                        struct scatterlist *sg, int nents,
 916                                        enum dma_data_direction direction)
 917 {
 918         ib_dma_unmap_sg(dev, sg, nents, direction);
 919 }
 920
 921 static inline __u64 kiblnd_sg_dma_address(struct ib_device *dev,
 922                                           struct scatterlist *sg)
 923 {
 924         return ib_sg_dma_address(dev, sg);
 925 }
 926
 927 static inline unsigned int kiblnd_sg_dma_len(struct ib_device *dev,
 928                                              struct scatterlist *sg)
 929 {
 930         return ib_sg_dma_len(dev, sg);
 931 }
 932
 933 /* XXX We use KIBLND_CONN_PARAM(e) as writable buffer, it's not strictly
 934  * right because OFED1.2 defines it as const, to use it we have to add
 935  * (void *) cast to overcome "const" */
 936
 937 #define KIBLND_CONN_PARAM(e)     ((e)->param.conn.private_data)
 938 #define KIBLND_CONN_PARAM_LEN(e) ((e)->param.conn.private_data_len)
 939
 940
 941 struct ib_mr *kiblnd_find_rd_dma_mr(kib_hca_dev_t *hdev,
 942                                     kib_rdma_desc_t *rd);
 943 struct ib_mr *kiblnd_find_dma_mr(kib_hca_dev_t *hdev,
 944                                  __u64 addr, __u64 size);
 945 void kiblnd_map_rx_descs(kib_conn_t *conn);
 946 void kiblnd_unmap_rx_descs(kib_conn_t *conn);
 947 int kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx,
 948                   kib_rdma_desc_t *rd, int nfrags);
 949 void kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx);
 950 void kiblnd_pool_free_node(kib_pool_t *pool, struct list_head *node);
 951 struct list_head *kiblnd_pool_alloc_node(kib_poolset_t *ps);
 952
 953 int  kiblnd_fmr_pool_map(kib_fmr_poolset_t *fps, __u64 *pages,
 954                          int npages, __u64 iov, kib_fmr_t *fmr);
 955 void kiblnd_fmr_pool_unmap(kib_fmr_t *fmr, int status);
 956
 957 int  kiblnd_startup(lnet_ni_t *ni);
 958 void kiblnd_shutdown(lnet_ni_t *ni);
 959 int  kiblnd_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg);
 960 void kiblnd_query(struct lnet_ni *ni, lnet_nid_t nid, unsigned long *when);
 961
 962 int  kiblnd_tunables_init(void);
 963 void kiblnd_tunables_fini(void);
 964
 965 int  kiblnd_connd(void *arg);
 966 int  kiblnd_scheduler(void *arg);
 967 int  kiblnd_thread_start(int (*fn)(void *arg), void *arg, char *name);
 968 int  kiblnd_failover_thread(void *arg);
 969
 970 int  kiblnd_alloc_pages(kib_pages_t **pp, int cpt, int npages);
 971 void kiblnd_free_pages(kib_pages_t *p);
 972
 973 int  kiblnd_cm_callback(struct rdma_cm_id *cmid,
 974                         struct rdma_cm_event *event);
 975 int  kiblnd_translate_mtu(int value);
 976
 977 int  kiblnd_dev_failover(kib_dev_t *dev);
 978 int  kiblnd_create_peer(lnet_ni_t *ni, kib_peer_t **peerp, lnet_nid_t nid);
 979 void kiblnd_destroy_peer(kib_peer_t *peer);
 980 void kiblnd_destroy_dev(kib_dev_t *dev);
 981 void kiblnd_unlink_peer_locked(kib_peer_t *peer);
 982 void kiblnd_peer_alive(kib_peer_t *peer);
 983 kib_peer_t *kiblnd_find_peer_locked(lnet_nid_t nid);
 984 void kiblnd_peer_connect_failed(kib_peer_t *peer, int active, int error);
 985 int  kiblnd_close_stale_conns_locked(kib_peer_t *peer,
 986                                       int version, __u64 incarnation);
 987 int  kiblnd_close_peer_conns_locked(kib_peer_t *peer, int why);
 988
 989 void kiblnd_connreq_done(kib_conn_t *conn, int status);
 990 kib_conn_t *kiblnd_create_conn(kib_peer_t *peer, struct rdma_cm_id *cmid,
 991                                 int state, int version);
 992 void kiblnd_destroy_conn(kib_conn_t *conn);
 993 void kiblnd_close_conn(kib_conn_t *conn, int error);
 994 void kiblnd_close_conn_locked(kib_conn_t *conn, int error);
 995
 996 int  kiblnd_init_rdma(kib_conn_t *conn, kib_tx_t *tx, int type,
 997                        int nob, kib_rdma_desc_t *dstrd, __u64 dstcookie);
 998
 999 void kiblnd_launch_tx(lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid);
1000 void kiblnd_queue_tx_locked(kib_tx_t *tx, kib_conn_t *conn);
1001 void kiblnd_queue_tx(kib_tx_t *tx, kib_conn_t *conn);
1002 void kiblnd_init_tx_msg(lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob);
1003 void kiblnd_txlist_done(lnet_ni_t *ni, struct list_head *txlist,
1004                          int status);
1005 void kiblnd_check_sends (kib_conn_t *conn);
1006
1007 void kiblnd_qp_event(struct ib_event *event, void *arg);
1008 void kiblnd_cq_event(struct ib_event *event, void *arg);
1009 void kiblnd_cq_completion(struct ib_cq *cq, void *arg);
1010
1011 void kiblnd_pack_msg(lnet_ni_t *ni, kib_msg_t *msg, int version,
1012                       int credits, lnet_nid_t dstnid, __u64 dststamp);
1013 int  kiblnd_unpack_msg(kib_msg_t *msg, int nob);
1014 int  kiblnd_post_rx(kib_rx_t *rx, int credit);
1015
1016 int  kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg);
1017 int  kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed,
1018                  unsigned int niov, struct kvec *iov, lnet_kiov_t *kiov,
1019                  unsigned int offset, unsigned int mlen, unsigned int rlen);