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 <asm/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_pmr_pool_size;     /* # physical MR in pool */
 108         int          *kib_fmr_pool_size;     /* # FMRs in pool */
 109         int          *kib_fmr_flush_trigger; /* When to trigger FMR flush */
 110         int          *kib_fmr_cache;         /* enable FMR pool cache? */
 111         int          *kib_require_priv_port; /* accept only privileged ports */
 112         int          *kib_use_priv_port;     /* use privileged port for active
 113                                               * connect */
 114         int          *kib_nscheds;           /* # threads on each CPT */
 115 } kib_tunables_t;
 116
 117 extern kib_tunables_t  kiblnd_tunables;
 118
 119 #define IBLND_MSG_QUEUE_SIZE_V1   8 /* V1 only : # messages/RDMAs in-flight */
 120 #define IBLND_CREDIT_HIGHWATER_V1 7 /* V1 only : when eagerly to return credits */
 121
 122 #define IBLND_CREDITS_DEFAULT     8 /* default # of peer credits */
 123 #define IBLND_CREDITS_MAX         ((typeof(((kib_msg_t *) 0)->ibm_credits)) - 1)  /* Max # of peer credits */
 124
 125 #define IBLND_MSG_QUEUE_SIZE(v)    ((v) == IBLND_MSG_VERSION_1 ? \
 126                                      IBLND_MSG_QUEUE_SIZE_V1 :   \
 127                                      *kiblnd_tunables.kib_peertxcredits) /* # messages/RDMAs in-flight */
 128 #define IBLND_CREDITS_HIGHWATER(v) ((v) == IBLND_MSG_VERSION_1 ? \
 129                                      IBLND_CREDIT_HIGHWATER_V1 : \
 130                                      *kiblnd_tunables.kib_peercredits_hiw) /* when eagerly to return credits */
 131
 132 #define kiblnd_rdma_create_id(cb, dev, ps, qpt) rdma_create_id(cb, dev, ps, qpt)
 133
 134 static inline int
 135 kiblnd_concurrent_sends_v1(void)
 136 {
 137         if (*kiblnd_tunables.kib_concurrent_sends > IBLND_MSG_QUEUE_SIZE_V1 * 2)
 138                 return IBLND_MSG_QUEUE_SIZE_V1 * 2;
 139
 140         if (*kiblnd_tunables.kib_concurrent_sends < IBLND_MSG_QUEUE_SIZE_V1 / 2)
 141                 return IBLND_MSG_QUEUE_SIZE_V1 / 2;
 142
 143         return *kiblnd_tunables.kib_concurrent_sends;
 144 }
 145
 146 #define IBLND_CONCURRENT_SENDS(v)  ((v) == IBLND_MSG_VERSION_1 ? \
 147                                      kiblnd_concurrent_sends_v1() : \
 148                                      *kiblnd_tunables.kib_concurrent_sends)
 149 /* 2 OOB shall suffice for 1 keepalive and 1 returning credits */
 150 #define IBLND_OOB_CAPABLE(v)       ((v) != IBLND_MSG_VERSION_1)
 151 #define IBLND_OOB_MSGS(v)          (IBLND_OOB_CAPABLE(v) ? 2 : 0)
 152
 153 #define IBLND_MSG_SIZE        (4<<10)            /* max size of queued messages (inc hdr) */
 154 #define IBLND_MAX_RDMA_FRAGS     LNET_MAX_IOV      /* max # of fragments supported */
 155 #define IBLND_CFG_RDMA_FRAGS       (*kiblnd_tunables.kib_map_on_demand != 0 ? \
 156                                     *kiblnd_tunables.kib_map_on_demand :      \
 157                                      IBLND_MAX_RDMA_FRAGS)  /* max # of fragments configured by user */
 158 #define IBLND_RDMA_FRAGS(v)     ((v) == IBLND_MSG_VERSION_1 ? \
 159                                      IBLND_MAX_RDMA_FRAGS : IBLND_CFG_RDMA_FRAGS)
 160
 161 /************************/
 162 /* derived constants... */
 163 /* Pools (shared by connections on each CPT) */
 164 /* These pools can grow at runtime, so don't need give a very large value */
 165 #define IBLND_TX_POOL                   256
 166 #define IBLND_PMR_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_pmr_pool;
 236
 237 typedef struct {
 238         struct list_head    pmr_list;           /* chain node */
 239         struct ib_phys_buf  *pmr_ipb;           /* physical buffer */
 240         struct ib_mr        *pmr_mr;            /* IB MR */
 241         struct kib_pmr_pool *pmr_pool;          /* owner of this MR */
 242         __u64               pmr_iova;           /* Virtual I/O address */
 243         int                 pmr_refcount;       /* reference count */
 244 } kib_phys_mr_t;
 245
 246 struct kib_pool;
 247 struct kib_poolset;
 248
 249 typedef int  (*kib_ps_pool_create_t)(struct kib_poolset *ps,
 250                                      int inc, struct kib_pool **pp_po);
 251 typedef void (*kib_ps_pool_destroy_t)(struct kib_pool *po);
 252 typedef void (*kib_ps_node_init_t)(struct kib_pool *po, struct list_head *node);
 253 typedef void (*kib_ps_node_fini_t)(struct kib_pool *po, struct list_head *node);
 254
 255 struct kib_net;
 256
 257 #define IBLND_POOL_NAME_LEN     32
 258
 259 typedef struct kib_poolset {
 260         spinlock_t            ps_lock;            /* serialize */
 261         struct kib_net        *ps_net;            /* network it belongs to */
 262         char                  ps_name[IBLND_POOL_NAME_LEN]; /* pool set name */
 263         struct list_head      ps_pool_list;       /* list of pools */
 264         struct list_head      ps_failed_pool_list;/* failed pool list */
 265         unsigned long         ps_next_retry;      /* time stamp for retry if
 266                                                    * failed to allocate */
 267         int                   ps_increasing;      /* is allocating new pool */
 268         int                   ps_pool_size;       /* new pool size */
 269         int                   ps_cpt;             /* CPT id */
 270
 271         kib_ps_pool_create_t  ps_pool_create;     /* create a new pool */
 272         kib_ps_pool_destroy_t ps_pool_destroy;    /* destroy a pool */
 273         kib_ps_node_init_t    ps_node_init;       /* initialize new allocated
 274                                                    * node */
 275         kib_ps_node_fini_t    ps_node_fini;       /* finalize node */
 276 } kib_poolset_t;
 277
 278 typedef struct kib_pool {
 279         struct list_head      po_list;         /* chain on pool list */
 280         struct list_head      po_free_list;    /* pre-allocated node */
 281         kib_poolset_t         *po_owner;       /* pool_set of this pool */
 282         unsigned long         po_deadline;     /* deadline of this pool */
 283         int                   po_allocated;    /* # of elements in use */
 284         int                   po_failed;       /* pool is created on failed
 285                                                 * HCA */
 286         int                   po_size;         /* # of pre-allocated elements */
 287 } kib_pool_t;
 288
 289 typedef struct {
 290         kib_poolset_t         tps_poolset;        /* pool-set */
 291         __u64                 tps_next_tx_cookie; /* cookie of TX */
 292 } kib_tx_poolset_t;
 293
 294 typedef struct {
 295         kib_pool_t            tpo_pool;           /* pool */
 296         struct kib_hca_dev    *tpo_hdev;          /* device for this pool */
 297         struct kib_tx         *tpo_tx_descs;      /* all the tx descriptors */
 298         kib_pages_t           *tpo_tx_pages;      /* premapped tx msg pages */
 299 } kib_tx_pool_t;
 300
 301 typedef struct {
 302         kib_poolset_t         pps_poolset;        /* pool-set */
 303 } kib_pmr_poolset_t;
 304
 305 typedef struct kib_pmr_pool {
 306         struct kib_hca_dev    *ppo_hdev;          /* device for this pool */
 307         kib_pool_t            ppo_pool;           /* pool */
 308 } kib_pmr_pool_t;
 309
 310 typedef struct {
 311         spinlock_t            fps_lock;            /* serialize */
 312         struct kib_net        *fps_net;            /* IB network */
 313         struct list_head      fps_pool_list;       /* FMR pool list */
 314         struct list_head      fps_failed_pool_list;/* FMR pool list */
 315         __u64                 fps_version;         /* validity stamp */
 316         int                   fps_cpt;             /* CPT id */
 317         int                   fps_pool_size;
 318         int                   fps_flush_trigger;
 319         int                   fps_increasing;      /* is allocating new pool */
 320         unsigned long         fps_next_retry;      /* time stamp for retry if
 321                                                     * failed to allocate */
 322 } kib_fmr_poolset_t;
 323
 324 typedef struct {
 325         struct list_head      fpo_list;            /* chain on pool list */
 326         struct kib_hca_dev    *fpo_hdev;           /* device for this pool */
 327         kib_fmr_poolset_t     *fpo_owner;          /* owner of this pool */
 328         struct ib_fmr_pool    *fpo_fmr_pool;       /* IB FMR pool */
 329         unsigned long         fpo_deadline;        /* deadline of this pool */
 330         int                   fpo_failed;          /* fmr pool is failed */
 331         int                   fpo_map_count;       /* # of mapped FMR */
 332 } kib_fmr_pool_t;
 333
 334 typedef struct {
 335         struct ib_pool_fmr    *fmr_pfmr;           /* IB pool fmr */
 336         kib_fmr_pool_t        *fmr_pool;           /* pool of FMR */
 337 } kib_fmr_t;
 338
 339 typedef struct kib_net {
 340         struct list_head      ibn_list;       /* chain on kib_dev_t::ibd_nets */
 341         __u64                 ibn_incarnation;/* my epoch */
 342         int                   ibn_init;       /* initialisation state */
 343         int                   ibn_shutdown;   /* shutting down? */
 344
 345         atomic_t              ibn_npeers;     /* # peers extant */
 346         atomic_t              ibn_nconns;     /* # connections extant */
 347
 348         kib_tx_poolset_t      **ibn_tx_ps;    /* tx pool-set */
 349         kib_fmr_poolset_t     **ibn_fmr_ps;   /* fmr pool-set */
 350         kib_pmr_poolset_t     **ibn_pmr_ps;   /* pmr pool-set */
 351
 352         kib_dev_t             *ibn_dev;       /* underlying IB device */
 353 } kib_net_t;
 354
 355 #define KIB_THREAD_SHIFT                16
 356 #define KIB_THREAD_ID(cpt, tid)         ((cpt) << KIB_THREAD_SHIFT | (tid))
 357 #define KIB_THREAD_CPT(id)              ((id) >> KIB_THREAD_SHIFT)
 358 #define KIB_THREAD_TID(id)              ((id) & ((1UL << KIB_THREAD_SHIFT) - 1))
 359
 360 struct kib_sched_info {
 361         spinlock_t         ibs_lock;     /* serialise */
 362         wait_queue_head_t  ibs_waitq;    /* schedulers sleep here */
 363         struct list_head   ibs_conns;    /* conns to check for rx completions */
 364         int                ibs_nthreads; /* number of scheduler threads */
 365         int                ibs_nthreads_max; /* max allowed scheduler threads */
 366         int                ibs_cpt;      /* CPT id */
 367 };
 368
 369 typedef struct {
 370         int                   kib_init;           /* initialisation state */
 371         int                   kib_shutdown;       /* shut down? */
 372         struct list_head      kib_devs;           /* IB devices extant */
 373         struct list_head      kib_failed_devs;    /* list head of failed
 374                                                    * devices */
 375         wait_queue_head_t     kib_failover_waitq; /* schedulers sleep here */
 376         atomic_t              kib_nthreads;       /* # live threads */
 377         rwlock_t              kib_global_lock;    /* stabilize net/dev/peer/conn
 378                                                    * ops */
 379         struct list_head      *kib_peers;         /* hash table of all my known
 380                                                    * peers */
 381         int                   kib_peer_hash_size; /* size of kib_peers */
 382         void                  *kib_connd;         /* the connd task
 383                                                    * (serialisation assertions)
 384                                                    */
 385         struct list_head      kib_connd_conns;    /* connections to
 386                                                    * setup/teardown */
 387         struct list_head      kib_connd_zombies;  /* connections with zero
 388                                                    * refcount */
 389         wait_queue_head_t     kib_connd_waitq;    /* connection daemon sleeps
 390                                                    * here */
 391         spinlock_t            kib_connd_lock;     /* serialise */
 392         struct ib_qp_attr     kib_error_qpa;      /* QP->ERROR */
 393         struct kib_sched_info **kib_scheds;       /* percpt data for schedulers
 394                                                    */
 395 } kib_data_t;
 396
 397 #define IBLND_INIT_NOTHING 0
 398 #define IBLND_INIT_DATA    1
 399 #define IBLND_INIT_ALL     2
 400
 401 /************************************************************************
 402  * IB Wire message format.
 403  * These are sent in sender's byte order (i.e. receiver flips).
 404  */
 405
 406 typedef struct kib_connparams {
 407         __u16        ibcp_queue_depth;
 408         __u16        ibcp_max_frags;
 409         __u32        ibcp_max_msg_size;
 410 } WIRE_ATTR kib_connparams_t;
 411
 412 typedef struct {
 413         lnet_hdr_t   ibim_hdr;        /* portals header */
 414         char         ibim_payload[0]; /* piggy-backed payload */
 415 } WIRE_ATTR kib_immediate_msg_t;
 416
 417 typedef struct {
 418         __u32        rf_nob;          /* # bytes this frag */
 419         __u64        rf_addr;         /* CAVEAT EMPTOR: misaligned!! */
 420 } WIRE_ATTR kib_rdma_frag_t;
 421
 422 typedef struct {
 423         __u32           rd_key;       /* local/remote key */
 424         __u32           rd_nfrags;    /* # fragments */
 425         kib_rdma_frag_t rd_frags[0];  /* buffer frags */
 426 } WIRE_ATTR kib_rdma_desc_t;
 427
 428 typedef struct {
 429         lnet_hdr_t      ibprm_hdr;    /* portals header */
 430         __u64           ibprm_cookie; /* opaque completion cookie */
 431 } WIRE_ATTR kib_putreq_msg_t;
 432
 433 typedef struct {
 434         __u64           ibpam_src_cookie; /* reflected completion cookie */
 435         __u64           ibpam_dst_cookie; /* opaque completion cookie */
 436         kib_rdma_desc_t ibpam_rd;         /* sender's sink buffer */
 437 } WIRE_ATTR kib_putack_msg_t;
 438
 439 typedef struct {
 440         lnet_hdr_t      ibgm_hdr;     /* portals header */
 441         __u64           ibgm_cookie;  /* opaque completion cookie */
 442         kib_rdma_desc_t ibgm_rd;      /* rdma descriptor */
 443 } WIRE_ATTR kib_get_msg_t;
 444
 445 typedef struct {
 446         __u64           ibcm_cookie;  /* opaque completion cookie */
 447         __s32           ibcm_status;  /* < 0 failure: >= 0 length */
 448 } WIRE_ATTR kib_completion_msg_t;
 449
 450 typedef struct {
 451         /* First 2 fields fixed FOR ALL TIME */
 452         __u32           ibm_magic;    /* I'm an ibnal message */
 453         __u16           ibm_version;  /* this is my version number */
 454
 455         __u8            ibm_type;     /* msg type */
 456         __u8            ibm_credits;  /* returned credits */
 457         __u32           ibm_nob;      /* # bytes in whole message */
 458         __u32           ibm_cksum;    /* checksum (0 == no checksum) */
 459         __u64           ibm_srcnid;   /* sender's NID */
 460         __u64           ibm_srcstamp; /* sender's incarnation */
 461         __u64           ibm_dstnid;   /* destination's NID */
 462         __u64           ibm_dststamp; /* destination's incarnation */
 463
 464         union {
 465                 kib_connparams_t     connparams;
 466                 kib_immediate_msg_t  immediate;
 467                 kib_putreq_msg_t     putreq;
 468                 kib_putack_msg_t     putack;
 469                 kib_get_msg_t        get;
 470                 kib_completion_msg_t completion;
 471         } WIRE_ATTR ibm_u;
 472 } WIRE_ATTR kib_msg_t;
 473
 474 #define IBLND_MSG_MAGIC     LNET_PROTO_IB_MAGIC /* unique magic */
 475
 476 #define IBLND_MSG_VERSION_1 0x11
 477 #define IBLND_MSG_VERSION_2 0x12
 478 #define IBLND_MSG_VERSION   IBLND_MSG_VERSION_2
 479
 480 #define IBLND_MSG_CONNREQ   0xc0        /* connection request */
 481 #define IBLND_MSG_CONNACK   0xc1        /* connection acknowledge */
 482 #define IBLND_MSG_NOOP      0xd0        /* nothing (just credits) */
 483 #define IBLND_MSG_IMMEDIATE 0xd1        /* immediate */
 484 #define IBLND_MSG_PUT_REQ   0xd2        /* putreq (src->sink) */
 485 #define IBLND_MSG_PUT_NAK   0xd3        /* completion (sink->src) */
 486 #define IBLND_MSG_PUT_ACK   0xd4        /* putack (sink->src) */
 487 #define IBLND_MSG_PUT_DONE  0xd5        /* completion (src->sink) */
 488 #define IBLND_MSG_GET_REQ   0xd6        /* getreq (sink->src) */
 489 #define IBLND_MSG_GET_DONE  0xd7        /* completion (src->sink: all OK) */
 490
 491 typedef struct {
 492         __u32            ibr_magic;       /* sender's magic */
 493         __u16            ibr_version;     /* sender's version */
 494         __u8             ibr_why;         /* reject reason */
 495         __u8             ibr_padding;     /* padding */
 496         __u64            ibr_incarnation; /* incarnation of peer */
 497         kib_connparams_t ibr_cp;          /* connection parameters */
 498 } WIRE_ATTR kib_rej_t;
 499
 500 /* connection rejection reasons */
 501 #define IBLND_REJECT_CONN_RACE      1 /* You lost connection race */
 502 #define IBLND_REJECT_NO_RESOURCES   2 /* Out of memory/conns etc */
 503 #define IBLND_REJECT_FATAL          3 /* Anything else */
 504 #define IBLND_REJECT_CONN_UNCOMPAT  4 /* incompatible version peer */
 505 #define IBLND_REJECT_CONN_STALE     5 /* stale peer */
 506 #define IBLND_REJECT_RDMA_FRAGS     6 /* Fatal: peer's rdma frags can't match
 507                                        * mine */
 508 #define IBLND_REJECT_MSG_QUEUE_SIZE 7 /* Fatal: peer's msg queue size can't
 509                                        * match mine */
 510
 511 /***********************************************************************/
 512
 513 typedef struct kib_rx                         /* receive message */
 514 {
 515         struct list_head       rx_list;       /* queue for attention */
 516         struct kib_conn        *rx_conn;      /* owning conn */
 517         int                    rx_nob;        /* # bytes received (-1 while
 518                                                * posted) */
 519         enum ib_wc_status      rx_status;     /* completion status */
 520         kib_msg_t              *rx_msg;       /* message buffer (host vaddr) */
 521         __u64                  rx_msgaddr;    /* message buffer (I/O addr) */
 522         DECLARE_PCI_UNMAP_ADDR (rx_msgunmap); /* for dma_unmap_single() */
 523         struct ib_recv_wr      rx_wrq;        /* receive work item... */
 524         struct ib_sge          rx_sge;        /* ...and its memory */
 525 } kib_rx_t;
 526
 527 #define IBLND_POSTRX_DONT_POST    0   /* don't post */
 528 #define IBLND_POSTRX_NO_CREDIT    1   /* post: no credits */
 529 #define IBLND_POSTRX_PEER_CREDIT  2   /* post: give peer back 1 credit */
 530 #define IBLND_POSTRX_RSRVD_CREDIT 3   /* post: give myself back 1 reserved
 531                                        * credit */
 532
 533 typedef struct kib_tx                         /* transmit message */
 534 {
 535         struct list_head       tx_list;       /* queue on idle_txs ibc_tx_queue
 536                                                * etc. */
 537         kib_tx_pool_t          *tx_pool;      /* pool I'm from */
 538         struct kib_conn        *tx_conn;      /* owning conn */
 539         short                  tx_sending;    /* # tx callbacks outstanding */
 540         short                  tx_queued;     /* queued for sending */
 541         short                  tx_waiting;    /* waiting for peer */
 542         int                    tx_status;     /* LNET completion status */
 543         unsigned long          tx_deadline;   /* completion deadline */
 544         __u64                  tx_cookie;     /* completion cookie */
 545         lnet_msg_t             *tx_lntmsg[2]; /* lnet msgs to finalize on
 546                                                * completion */
 547         kib_msg_t              *tx_msg;       /* message buffer (host vaddr) */
 548         __u64                  tx_msgaddr;    /* message buffer (I/O addr) */
 549         DECLARE_PCI_UNMAP_ADDR (tx_msgunmap); /* for dma_unmap_single() */
 550         int                    tx_nwrq;       /* # send work items */
 551         struct ib_send_wr      *tx_wrq;       /* send work items... */
 552         struct ib_sge          *tx_sge;       /* ...and their memory */
 553         kib_rdma_desc_t        *tx_rd;        /* rdma descriptor */
 554         int                    tx_nfrags;     /* # entries in... */
 555         struct scatterlist     *tx_frags;     /* dma_map_sg descriptor */
 556         __u64                  *tx_pages;     /* rdma phys page addrs */
 557         union {
 558                 kib_phys_mr_t  *pmr;          /* MR for physical buffer */
 559                 kib_fmr_t      fmr;           /* FMR */
 560         }                      tx_u;
 561         int                    tx_dmadir;     /* dma direction */
 562 } kib_tx_t;
 563
 564 typedef struct kib_connvars {
 565         kib_msg_t cv_msg; /* connection-in-progress variables */
 566 } kib_connvars_t;
 567
 568 typedef struct kib_conn {
 569         struct kib_sched_info *ibc_sched;           /* scheduler information */
 570         struct kib_peer       *ibc_peer;            /* owning peer */
 571         kib_hca_dev_t         *ibc_hdev;            /* HCA bound on */
 572         struct list_head      ibc_list;             /* stash on peer's conn
 573                                                      * list */
 574         struct list_head      ibc_sched_list;       /* schedule for attention */
 575         __u16                 ibc_version;          /* version of connection */
 576         __u64                 ibc_incarnation;      /* which instance of the
 577                                                      * peer */
 578         atomic_t              ibc_refcount;         /* # users */
 579         int                   ibc_state;            /* what's happening */
 580         int                   ibc_nsends_posted;    /* # uncompleted sends */
 581         int                   ibc_noops_posted;     /* # uncompleted NOOPs */
 582         int                   ibc_credits;          /* # credits I have */
 583         int                   ibc_outstanding_credits; /* # credits to return */
 584         int                   ibc_reserved_credits; /* # ACK/DONE msg credits */
 585         int                   ibc_comms_error;      /* set on comms error */
 586         unsigned int          ibc_nrx:16;           /* receive buffers owned */
 587         unsigned int          ibc_scheduled:1;      /* scheduled for attention
 588                                                      */
 589         unsigned int          ibc_ready:1;          /* CQ callback fired */
 590         unsigned long         ibc_last_send;        /* time of last send */
 591         struct list_head      ibc_connd_list;       /* link chain for
 592                                                      * kiblnd_check_conns only
 593                                                      */
 594         struct list_head      ibc_early_rxs;        /* rxs completed before
 595                                                      * ESTABLISHED */
 596         struct list_head      ibc_tx_noops;         /* IBLND_MSG_NOOPs for
 597                                                      * IBLND_MSG_VERSION_1 */
 598         struct list_head      ibc_tx_queue;         /* sends that need a credit
 599                                                      */
 600         struct list_head      ibc_tx_queue_nocred;  /* sends that don't need a
 601                                                      * credit */
 602         struct list_head      ibc_tx_queue_rsrvd;   /* sends that need to
 603                                                      * reserve an ACK/DONE msg
 604                                                      */
 605         struct list_head      ibc_active_txs;       /* active tx awaiting
 606                                                      * completion */
 607         spinlock_t            ibc_lock;             /* serialise */
 608         kib_rx_t              *ibc_rxs;             /* the rx descs */
 609         kib_pages_t           *ibc_rx_pages;        /* premapped rx msg pages */
 610
 611         struct rdma_cm_id     *ibc_cmid;            /* CM id */
 612         struct ib_cq          *ibc_cq;              /* completion queue */
 613
 614         kib_connvars_t        *ibc_connvars;        /* in-progress connection
 615                                                      * state */
 616 } kib_conn_t;
 617
 618 #define IBLND_CONN_INIT           0      /* being initialised */
 619 #define IBLND_CONN_ACTIVE_CONNECT 1      /* active sending req */
 620 #define IBLND_CONN_PASSIVE_WAIT   2      /* passive waiting for rtu */
 621 #define IBLND_CONN_ESTABLISHED    3      /* connection established */
 622 #define IBLND_CONN_CLOSING        4      /* being closed */
 623 #define IBLND_CONN_DISCONNECTED   5      /* disconnected */
 624
 625 typedef struct kib_peer {
 626         struct list_head ibp_list;        /* stash on global peer list */
 627         lnet_nid_t       ibp_nid;         /* who's on the other end(s) */
 628         lnet_ni_t        *ibp_ni;         /* LNet interface */
 629         atomic_t         ibp_refcount;    /* # users */
 630         struct list_head ibp_conns;       /* all active connections */
 631         struct list_head ibp_tx_queue;    /* msgs waiting for a conn */
 632         __u16            ibp_version;     /* version of peer */
 633         __u64            ibp_incarnation; /* incarnation of peer */
 634         int              ibp_connecting;  /* current active connection attempts
 635                                            */
 636         int              ibp_accepting;   /* current passive connection attempts
 637                                            */
 638         int              ibp_error;       /* errno on closing this peer */
 639         unsigned long    ibp_last_alive;  /* when (in jiffies) I was last alive
 640                                            */
 641 } kib_peer_t;
 642
 643 extern kib_data_t kiblnd_data;
 644
 645 extern void kiblnd_hdev_destroy(kib_hca_dev_t *hdev);
 646
 647 static inline void
 648 kiblnd_hdev_addref_locked(kib_hca_dev_t *hdev)
 649 {
 650         LASSERT (atomic_read(&hdev->ibh_ref) > 0);
 651         atomic_inc(&hdev->ibh_ref);
 652 }
 653
 654 static inline void
 655 kiblnd_hdev_decref(kib_hca_dev_t *hdev)
 656 {
 657         LASSERT (atomic_read(&hdev->ibh_ref) > 0);
 658         if (atomic_dec_and_test(&hdev->ibh_ref))
 659                 kiblnd_hdev_destroy(hdev);
 660 }
 661
 662 static inline int
 663 kiblnd_dev_can_failover(kib_dev_t *dev)
 664 {
 665         if (!list_empty(&dev->ibd_fail_list)) /* already scheduled */
 666                 return 0;
 667
 668         if (*kiblnd_tunables.kib_dev_failover == 0) /* disabled */
 669                 return 0;
 670
 671         if (*kiblnd_tunables.kib_dev_failover > 1) /* force failover */
 672                 return 1;
 673
 674         return dev->ibd_can_failover;
 675 }
 676
 677 #define kiblnd_conn_addref(conn)                                \
 678 do {                                                        \
 679         CDEBUG(D_NET, "conn[%p] (%d)++\n",                    \
 680                (conn), atomic_read(&(conn)->ibc_refcount)); \
 681         atomic_inc(&(conn)->ibc_refcount);                \
 682 } while (0)
 683
 684 #define kiblnd_conn_decref(conn)                                        \
 685 do {                                                                    \
 686         unsigned long flags;                                            \
 687                                                                         \
 688         CDEBUG(D_NET, "conn[%p] (%d)--\n",                              \
 689                (conn), atomic_read(&(conn)->ibc_refcount));             \
 690         LASSERT_ATOMIC_POS(&(conn)->ibc_refcount);                      \
 691         if (atomic_dec_and_test(&(conn)->ibc_refcount)) {               \
 692                 spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags);  \
 693                 list_add_tail(&(conn)->ibc_list,                        \
 694                                   &kiblnd_data.kib_connd_zombies);      \
 695                 wake_up(&kiblnd_data.kib_connd_waitq);          \
 696                 spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags);\
 697         }                                                               \
 698 } while (0)
 699
 700 #define kiblnd_peer_addref(peer)                                \
 701 do {                                                        \
 702         CDEBUG(D_NET, "peer[%p] -> %s (%d)++\n",                \
 703                (peer), libcfs_nid2str((peer)->ibp_nid),  \
 704                atomic_read (&(peer)->ibp_refcount));    \
 705         atomic_inc(&(peer)->ibp_refcount);                \
 706 } while (0)
 707
 708 #define kiblnd_peer_decref(peer)                                \
 709 do {                                                        \
 710         CDEBUG(D_NET, "peer[%p] -> %s (%d)--\n",                \
 711                (peer), libcfs_nid2str((peer)->ibp_nid),  \
 712                atomic_read (&(peer)->ibp_refcount));    \
 713         LASSERT_ATOMIC_POS(&(peer)->ibp_refcount);            \
 714         if (atomic_dec_and_test(&(peer)->ibp_refcount))     \
 715                 kiblnd_destroy_peer(peer);                    \
 716 } while (0)
 717
 718 static inline struct list_head *
 719 kiblnd_nid2peerlist (lnet_nid_t nid)
 720 {
 721         unsigned int hash =
 722                 ((unsigned int)nid) % kiblnd_data.kib_peer_hash_size;
 723
 724         return (&kiblnd_data.kib_peers [hash]);
 725 }
 726
 727 static inline int
 728 kiblnd_peer_active (kib_peer_t *peer)
 729 {
 730         /* Am I in the peer hash table? */
 731         return (!list_empty(&peer->ibp_list));
 732 }
 733
 734 static inline kib_conn_t *
 735 kiblnd_get_conn_locked (kib_peer_t *peer)
 736 {
 737         LASSERT (!list_empty(&peer->ibp_conns));
 738
 739         /* just return the first connection */
 740         return list_entry(peer->ibp_conns.next, kib_conn_t, ibc_list);
 741 }
 742
 743 static inline int
 744 kiblnd_send_keepalive(kib_conn_t *conn)
 745 {
 746         return (*kiblnd_tunables.kib_keepalive > 0) &&
 747                 cfs_time_after(jiffies, conn->ibc_last_send +
 748                                *kiblnd_tunables.kib_keepalive*HZ);
 749 }
 750
 751 static inline int
 752 kiblnd_need_noop(kib_conn_t *conn)
 753 {
 754         LASSERT (conn->ibc_state >= IBLND_CONN_ESTABLISHED);
 755
 756         if (conn->ibc_outstanding_credits <
 757             IBLND_CREDITS_HIGHWATER(conn->ibc_version) &&
 758             !kiblnd_send_keepalive(conn))
 759                 return 0; /* No need to send NOOP */
 760
 761         if (IBLND_OOB_CAPABLE(conn->ibc_version)) {
 762                 if (!list_empty(&conn->ibc_tx_queue_nocred))
 763                         return 0; /* NOOP can be piggybacked */
 764
 765                 /* No tx to piggyback NOOP onto or no credit to send a tx */
 766                 return (list_empty(&conn->ibc_tx_queue) ||
 767                         conn->ibc_credits == 0);
 768         }
 769
 770         if (!list_empty(&conn->ibc_tx_noops) || /* NOOP already queued */
 771             !list_empty(&conn->ibc_tx_queue_nocred) || /* piggyback NOOP */
 772             conn->ibc_credits == 0)                 /* no credit */
 773                 return 0;
 774
 775         if (conn->ibc_credits == 1 &&      /* last credit reserved for */
 776             conn->ibc_outstanding_credits == 0) /* giving back credits */
 777                 return 0;
 778
 779         /* No tx to piggyback NOOP onto or no credit to send a tx */
 780         return (list_empty(&conn->ibc_tx_queue) || conn->ibc_credits == 1);
 781 }
 782
 783 static inline void
 784 kiblnd_abort_receives(kib_conn_t *conn)
 785 {
 786         ib_modify_qp(conn->ibc_cmid->qp,
 787                      &kiblnd_data.kib_error_qpa, IB_QP_STATE);
 788 }
 789
 790 static inline const char *
 791 kiblnd_queue2str (kib_conn_t *conn, struct list_head *q)
 792 {
 793         if (q == &conn->ibc_tx_queue)
 794                 return "tx_queue";
 795
 796         if (q == &conn->ibc_tx_queue_rsrvd)
 797                 return "tx_queue_rsrvd";
 798
 799         if (q == &conn->ibc_tx_queue_nocred)
 800                 return "tx_queue_nocred";
 801
 802         if (q == &conn->ibc_active_txs)
 803                 return "active_txs";
 804
 805         LBUG();
 806         return NULL;
 807 }
 808
 809 /* CAVEAT EMPTOR: We rely on descriptor alignment to allow us to use the
 810  * lowest bits of the work request id to stash the work item type. */
 811
 812 #define IBLND_WID_TX    0
 813 #define IBLND_WID_RDMA  1
 814 #define IBLND_WID_RX    2
 815 #define IBLND_WID_MASK  3UL
 816
 817 static inline __u64
 818 kiblnd_ptr2wreqid (void *ptr, int type)
 819 {
 820         unsigned long lptr = (unsigned long)ptr;
 821
 822         LASSERT ((lptr & IBLND_WID_MASK) == 0);
 823         LASSERT ((type & ~IBLND_WID_MASK) == 0);
 824         return (__u64)(lptr | type);
 825 }
 826
 827 static inline void *
 828 kiblnd_wreqid2ptr (__u64 wreqid)
 829 {
 830         return (void *)(((unsigned long)wreqid) & ~IBLND_WID_MASK);
 831 }
 832
 833 static inline int
 834 kiblnd_wreqid2type (__u64 wreqid)
 835 {
 836         return (wreqid & IBLND_WID_MASK);
 837 }
 838
 839 static inline void
 840 kiblnd_set_conn_state (kib_conn_t *conn, int state)
 841 {
 842         conn->ibc_state = state;
 843         mb();
 844 }
 845
 846 static inline void
 847 kiblnd_init_msg (kib_msg_t *msg, int type, int body_nob)
 848 {
 849         msg->ibm_type = type;
 850         msg->ibm_nob  = offsetof(kib_msg_t, ibm_u) + body_nob;
 851 }
 852
 853 static inline int
 854 kiblnd_rd_size (kib_rdma_desc_t *rd)
 855 {
 856         int   i;
 857         int   size;
 858
 859         for (i = size = 0; i < rd->rd_nfrags; i++)
 860                 size += rd->rd_frags[i].rf_nob;
 861
 862         return size;
 863 }
 864
 865 static inline __u64
 866 kiblnd_rd_frag_addr(kib_rdma_desc_t *rd, int index)
 867 {
 868         return rd->rd_frags[index].rf_addr;
 869 }
 870
 871 static inline __u32
 872 kiblnd_rd_frag_size(kib_rdma_desc_t *rd, int index)
 873 {
 874         return rd->rd_frags[index].rf_nob;
 875 }
 876
 877 static inline __u32
 878 kiblnd_rd_frag_key(kib_rdma_desc_t *rd, int index)
 879 {
 880         return rd->rd_key;
 881 }
 882
 883 static inline int
 884 kiblnd_rd_consume_frag(kib_rdma_desc_t *rd, int index, __u32 nob)
 885 {
 886         if (nob < rd->rd_frags[index].rf_nob) {
 887                 rd->rd_frags[index].rf_addr += nob;
 888                 rd->rd_frags[index].rf_nob  -= nob;
 889         } else {
 890                 index ++;
 891         }
 892
 893         return index;
 894 }
 895
 896 static inline int
 897 kiblnd_rd_msg_size(kib_rdma_desc_t *rd, int msgtype, int n)
 898 {
 899         LASSERT (msgtype == IBLND_MSG_GET_REQ ||
 900                  msgtype == IBLND_MSG_PUT_ACK);
 901
 902         return msgtype == IBLND_MSG_GET_REQ ?
 903                offsetof(kib_get_msg_t, ibgm_rd.rd_frags[n]) :
 904                offsetof(kib_putack_msg_t, ibpam_rd.rd_frags[n]);
 905 }
 906
 907
 908 static inline __u64
 909 kiblnd_dma_mapping_error(struct ib_device *dev, u64 dma_addr)
 910 {
 911         return ib_dma_mapping_error(dev, dma_addr);
 912 }
 913
 914 static inline __u64 kiblnd_dma_map_single(struct ib_device *dev,
 915                                           void *msg, size_t size,
 916                                           enum dma_data_direction direction)
 917 {
 918         return ib_dma_map_single(dev, msg, size, direction);
 919 }
 920
 921 static inline void kiblnd_dma_unmap_single(struct ib_device *dev,
 922                                            __u64 addr, size_t size,
 923                                           enum dma_data_direction direction)
 924 {
 925         ib_dma_unmap_single(dev, addr, size, direction);
 926 }
 927
 928 #define KIBLND_UNMAP_ADDR_SET(p, m, a)  do {} while (0)
 929 #define KIBLND_UNMAP_ADDR(p, m, a)      (a)
 930
 931 static inline int kiblnd_dma_map_sg(struct ib_device *dev,
 932                                     struct scatterlist *sg, int nents,
 933                                     enum dma_data_direction direction)
 934 {
 935         return ib_dma_map_sg(dev, sg, nents, direction);
 936 }
 937
 938 static inline void kiblnd_dma_unmap_sg(struct ib_device *dev,
 939                                        struct scatterlist *sg, int nents,
 940                                        enum dma_data_direction direction)
 941 {
 942         ib_dma_unmap_sg(dev, sg, nents, direction);
 943 }
 944
 945 static inline __u64 kiblnd_sg_dma_address(struct ib_device *dev,
 946                                           struct scatterlist *sg)
 947 {
 948         return ib_sg_dma_address(dev, sg);
 949 }
 950
 951 static inline unsigned int kiblnd_sg_dma_len(struct ib_device *dev,
 952                                              struct scatterlist *sg)
 953 {
 954         return ib_sg_dma_len(dev, sg);
 955 }
 956
 957 /* XXX We use KIBLND_CONN_PARAM(e) as writable buffer, it's not strictly
 958  * right because OFED1.2 defines it as const, to use it we have to add
 959  * (void *) cast to overcome "const" */
 960
 961 #define KIBLND_CONN_PARAM(e)     ((e)->param.conn.private_data)
 962 #define KIBLND_CONN_PARAM_LEN(e) ((e)->param.conn.private_data_len)
 963
 964
 965 struct ib_mr *kiblnd_find_rd_dma_mr(kib_hca_dev_t *hdev,
 966                                     kib_rdma_desc_t *rd);
 967 struct ib_mr *kiblnd_find_dma_mr(kib_hca_dev_t *hdev,
 968                                  __u64 addr, __u64 size);
 969 void kiblnd_map_rx_descs(kib_conn_t *conn);
 970 void kiblnd_unmap_rx_descs(kib_conn_t *conn);
 971 int kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx,
 972                   kib_rdma_desc_t *rd, int nfrags);
 973 void kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx);
 974 void kiblnd_pool_free_node(kib_pool_t *pool, struct list_head *node);
 975 struct list_head *kiblnd_pool_alloc_node(kib_poolset_t *ps);
 976
 977 int  kiblnd_fmr_pool_map(kib_fmr_poolset_t *fps, __u64 *pages,
 978                          int npages, __u64 iov, kib_fmr_t *fmr);
 979 void kiblnd_fmr_pool_unmap(kib_fmr_t *fmr, int status);
 980
 981 int  kiblnd_pmr_pool_map(kib_pmr_poolset_t *pps, kib_hca_dev_t *hdev,
 982                          kib_rdma_desc_t *rd, __u64 *iova, kib_phys_mr_t **pp_pmr);
 983 void kiblnd_pmr_pool_unmap(kib_phys_mr_t *pmr);
 984
 985 int  kiblnd_startup (lnet_ni_t *ni);
 986 void kiblnd_shutdown (lnet_ni_t *ni);
 987 int  kiblnd_ctl (lnet_ni_t *ni, unsigned int cmd, void *arg);
 988 void kiblnd_query (struct lnet_ni *ni, lnet_nid_t nid, unsigned long *when);
 989
 990 int  kiblnd_tunables_init(void);
 991 void kiblnd_tunables_fini(void);
 992
 993 int  kiblnd_connd (void *arg);
 994 int  kiblnd_scheduler(void *arg);
 995 int  kiblnd_thread_start(int (*fn)(void *arg), void *arg, char *name);
 996 int  kiblnd_failover_thread (void *arg);
 997
 998 int  kiblnd_alloc_pages(kib_pages_t **pp, int cpt, int npages);
 999 void kiblnd_free_pages (kib_pages_t *p);
1000
1001 int  kiblnd_cm_callback(struct rdma_cm_id *cmid,
1002                         struct rdma_cm_event *event);
1003 int  kiblnd_translate_mtu(int value);
1004
1005 int  kiblnd_dev_failover(kib_dev_t *dev);
1006 int  kiblnd_create_peer (lnet_ni_t *ni, kib_peer_t **peerp, lnet_nid_t nid);
1007 void kiblnd_destroy_peer (kib_peer_t *peer);
1008 void kiblnd_destroy_dev (kib_dev_t *dev);
1009 void kiblnd_unlink_peer_locked (kib_peer_t *peer);
1010 void kiblnd_peer_alive (kib_peer_t *peer);
1011 kib_peer_t *kiblnd_find_peer_locked (lnet_nid_t nid);
1012 void kiblnd_peer_connect_failed (kib_peer_t *peer, int active, int error);
1013 int  kiblnd_close_stale_conns_locked (kib_peer_t *peer,
1014                                       int version, __u64 incarnation);
1015 int  kiblnd_close_peer_conns_locked (kib_peer_t *peer, int why);
1016
1017 void kiblnd_connreq_done(kib_conn_t *conn, int status);
1018 kib_conn_t *kiblnd_create_conn (kib_peer_t *peer, struct rdma_cm_id *cmid,
1019                                 int state, int version);
1020 void kiblnd_destroy_conn (kib_conn_t *conn);
1021 void kiblnd_close_conn (kib_conn_t *conn, int error);
1022 void kiblnd_close_conn_locked (kib_conn_t *conn, int error);
1023
1024 int  kiblnd_init_rdma (kib_conn_t *conn, kib_tx_t *tx, int type,
1025                        int nob, kib_rdma_desc_t *dstrd, __u64 dstcookie);
1026
1027 void kiblnd_launch_tx (lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid);
1028 void kiblnd_queue_tx_locked (kib_tx_t *tx, kib_conn_t *conn);
1029 void kiblnd_queue_tx (kib_tx_t *tx, kib_conn_t *conn);
1030 void kiblnd_init_tx_msg (lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob);
1031 void kiblnd_txlist_done (lnet_ni_t *ni, struct list_head *txlist,
1032                          int status);
1033 void kiblnd_check_sends (kib_conn_t *conn);
1034
1035 void kiblnd_qp_event(struct ib_event *event, void *arg);
1036 void kiblnd_cq_event(struct ib_event *event, void *arg);
1037 void kiblnd_cq_completion(struct ib_cq *cq, void *arg);
1038
1039 void kiblnd_pack_msg (lnet_ni_t *ni, kib_msg_t *msg, int version,
1040                       int credits, lnet_nid_t dstnid, __u64 dststamp);
1041 int  kiblnd_unpack_msg(kib_msg_t *msg, int nob);
1042 int  kiblnd_post_rx (kib_rx_t *rx, int credit);
1043
1044 int  kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg);
1045 int  kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed,
1046                  unsigned int niov, struct kvec *iov, lnet_kiov_t *kiov,
1047                  unsigned int offset, unsigned int mlen, unsigned int rlen);