1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2006 Cluster File Systems, Inc.
5 * Author: Eric Barton <eric@bartonsoftware.com>
7 * This file is part of Lustre, http://www.lustre.org.
9 * Lustre is free software; you can redistribute it and/or
10 * modify it under the terms of version 2 of the GNU General Public
11 * License as published by the Free Software Foundation.
13 * Lustre is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with Lustre; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 # define EXPORT_SYMTAB
28 #include <linux/config.h>
29 #include <linux/module.h>
30 #include <linux/kernel.h>
32 #include <linux/string.h>
33 #include <linux/stat.h>
34 #include <linux/errno.h>
35 #include <linux/smp_lock.h>
36 #include <linux/unistd.h>
37 #include <linux/uio.h>
39 #include <asm/system.h>
40 #include <asm/uaccess.h>
43 #include <linux/init.h>
45 #include <linux/file.h>
46 #include <linux/stat.h>
47 #include <linux/list.h>
48 #include <linux/kmod.h>
49 #include <linux/sysctl.h>
50 #include <linux/random.h>
55 #define DEBUG_SUBSYSTEM S_LND
57 #include <libcfs/kp30.h>
58 #include <lnet/lnet.h>
59 #include <lnet/lib-lnet.h>
65 #include <rdma/rdma_cm.h>
66 #include <rdma/ib_cm.h>
67 #include <rdma/ib_verbs.h>
68 #include <rdma/ib_fmr_pool.h>
70 /* tunables fixed at compile time */
72 # define IBLND_N_SCHED num_online_cpus() /* # schedulers */
74 # define IBLND_N_SCHED 1 /* # schedulers */
77 #define IBLND_PEER_HASH_SIZE 101 /* # peer lists */
78 #define IBLND_RESCHED 100 /* # scheduler loops before reschedule */
79 #define IBLND_MSG_QUEUE_SIZE 8 /* # messages/RDMAs in-flight */
80 #define IBLND_CREDIT_HIGHWATER 7 /* when eagerly to return credits */
81 #define IBLND_MSG_SIZE (4<<10) /* max size of queued messages (inc hdr) */
83 #define IBLND_MAP_ON_DEMAND 0
84 #if IBLND_MAP_ON_DEMAND
85 # define IBLND_MAX_RDMA_FRAGS 1
87 # define IBLND_MAX_RDMA_FRAGS LNET_MAX_IOV
90 /************************/
91 /* derived constants... */
93 /* TX messages (shared by all connections) */
94 #define IBLND_TX_MSGS() (*kiblnd_tunables.kib_ntx)
95 #define IBLND_TX_MSG_BYTES() (IBLND_TX_MSGS() * IBLND_MSG_SIZE)
96 #define IBLND_TX_MSG_PAGES() ((IBLND_TX_MSG_BYTES() + PAGE_SIZE - 1)/PAGE_SIZE)
98 /* RX messages (per connection) */
99 #define IBLND_RX_MSGS (IBLND_MSG_QUEUE_SIZE*2)
100 #define IBLND_RX_MSG_BYTES (IBLND_RX_MSGS * IBLND_MSG_SIZE)
101 #define IBLND_RX_MSG_PAGES ((IBLND_RX_MSG_BYTES + PAGE_SIZE - 1)/PAGE_SIZE)
103 #define IBLND_CQ_ENTRIES() (IBLND_RX_MSGS + \
104 (*kiblnd_tunables.kib_concurrent_sends) * \
105 (1 + IBLND_MAX_RDMA_FRAGS))
109 unsigned int *kib_service; /* IB service number */
110 int *kib_min_reconnect_interval; /* first failed connection retry... */
111 int *kib_max_reconnect_interval; /* ...exponentially increasing to this */
112 int *kib_cksum; /* checksum kib_msg_t? */
113 int *kib_timeout; /* comms timeout (seconds) */
114 int *kib_keepalive; /* keepalive timeout (seconds) */
115 int *kib_ntx; /* # tx descs */
116 int *kib_credits; /* # concurrent sends */
117 int *kib_peercredits; /* # concurrent sends to 1 peer */
118 char **kib_default_ipif; /* default IPoIB interface */
119 int *kib_retry_count;
120 int *kib_rnr_retry_count;
121 int *kib_concurrent_sends; /* send work queue sizing */
122 int *kib_ib_mtu; /* IB MTU */
123 #if IBLND_MAP_ON_DEMAND
124 int *kib_fmr_pool_size; /* # FMRs in pool */
125 int *kib_fmr_flush_trigger; /* When to trigger FMR flush */
126 int *kib_fmr_cache; /* enable FMR pool cache? */
128 #if CONFIG_SYSCTL && !CFS_SYSFS_MODULE_PARM
129 struct ctl_table_header *kib_sysctl; /* sysctl interface */
135 int ibp_npages; /* # pages */
136 struct page *ibp_pages[0];
141 struct list_head ibd_list; /* chain on kib_devs */
142 __u32 ibd_ifip; /* IPoIB interface IP */
143 char ibd_ifname[32]; /* IPoIB interface name */
144 int ibd_nnets; /* # nets extant */
146 struct rdma_cm_id *ibd_cmid; /* IB listener (bound to 1 device) */
147 struct ib_pd *ibd_pd; /* PD for the device */
148 struct ib_mr *ibd_mr; /* MR for non RDMA I/O */
153 __u64 ibn_incarnation; /* my epoch */
154 int ibn_init; /* initialisation state */
155 int ibn_shutdown; /* shutting down? */
157 atomic_t ibn_npeers; /* # peers extant */
158 atomic_t ibn_nconns; /* # connections extant */
160 struct kib_tx *ibn_tx_descs; /* all the tx descriptors */
161 kib_pages_t *ibn_tx_pages; /* premapped tx msg pages */
162 struct list_head ibn_idle_txs; /* idle tx descriptors */
163 spinlock_t ibn_tx_lock; /* serialise */
165 #if IBLND_MAP_ON_DEMAND
166 struct ib_fmr_pool *ibn_fmrpool; /* FMR pool for RDMA I/O */
169 kib_dev_t *ibn_dev; /* underlying IB device */
174 int kib_init; /* initialisation state */
175 int kib_shutdown; /* shut down? */
176 struct list_head kib_devs; /* IB devices extant */
177 atomic_t kib_nthreads; /* # live threads */
178 rwlock_t kib_global_lock; /* stabilize net/dev/peer/conn ops */
180 struct list_head *kib_peers; /* hash table of all my known peers */
181 int kib_peer_hash_size; /* size of kib_peers */
183 void *kib_connd; /* the connd task (serialisation assertions) */
184 struct list_head kib_connd_conns; /* connections to setup/teardown */
185 struct list_head kib_connd_zombies; /* connections with zero refcount */
186 wait_queue_head_t kib_connd_waitq; /* connection daemon sleeps here */
187 spinlock_t kib_connd_lock; /* serialise */
189 wait_queue_head_t kib_sched_waitq; /* schedulers sleep here */
190 struct list_head kib_sched_conns; /* conns to check for rx completions */
191 spinlock_t kib_sched_lock; /* serialise */
193 __u64 kib_next_tx_cookie; /* RDMA completion cookie */
194 struct ib_qp_attr kib_error_qpa; /* QP->ERROR */
197 #define IBLND_INIT_NOTHING 0
198 #define IBLND_INIT_DATA 1
199 #define IBLND_INIT_ALL 2
201 /************************************************************************
202 * IB Wire message format.
203 * These are sent in sender's byte order (i.e. receiver flips).
206 typedef struct kib_connparams
208 __u16 ibcp_queue_depth;
209 __u16 ibcp_max_frags;
210 __u32 ibcp_max_msg_size;
211 } WIRE_ATTR kib_connparams_t;
215 lnet_hdr_t ibim_hdr; /* portals header */
216 char ibim_payload[0]; /* piggy-backed payload */
217 } WIRE_ATTR kib_immediate_msg_t;
219 #if IBLND_MAP_ON_DEMAND
222 __u64 rd_addr; /* IO VMA address */
223 __u32 rd_nob; /* # of bytes */
224 __u32 rd_key; /* remote key */
225 } WIRE_ATTR kib_rdma_desc_t;
229 __u32 rf_nob; /* # bytes this frag */
230 __u64 rf_addr; /* CAVEAT EMPTOR: misaligned!! */
231 } WIRE_ATTR kib_rdma_frag_t;
235 __u32 rd_key; /* local/remote key */
236 __u32 rd_nfrags; /* # fragments */
237 kib_rdma_frag_t rd_frags[0]; /* buffer frags */
238 } WIRE_ATTR kib_rdma_desc_t;
243 lnet_hdr_t ibprm_hdr; /* portals header */
244 __u64 ibprm_cookie; /* opaque completion cookie */
245 } WIRE_ATTR kib_putreq_msg_t;
249 __u64 ibpam_src_cookie; /* reflected completion cookie */
250 __u64 ibpam_dst_cookie; /* opaque completion cookie */
251 kib_rdma_desc_t ibpam_rd; /* sender's sink buffer */
252 } WIRE_ATTR kib_putack_msg_t;
256 lnet_hdr_t ibgm_hdr; /* portals header */
257 __u64 ibgm_cookie; /* opaque completion cookie */
258 kib_rdma_desc_t ibgm_rd; /* rdma descriptor */
259 } WIRE_ATTR kib_get_msg_t;
263 __u64 ibcm_cookie; /* opaque completion cookie */
264 __s32 ibcm_status; /* < 0 failure: >= 0 length */
265 } WIRE_ATTR kib_completion_msg_t;
269 /* First 2 fields fixed FOR ALL TIME */
270 __u32 ibm_magic; /* I'm an openibnal message */
271 __u16 ibm_version; /* this is my version number */
273 __u8 ibm_type; /* msg type */
274 __u8 ibm_credits; /* returned credits */
275 __u32 ibm_nob; /* # bytes in whole message */
276 __u32 ibm_cksum; /* checksum (0 == no checksum) */
277 __u64 ibm_srcnid; /* sender's NID */
278 __u64 ibm_srcstamp; /* sender's incarnation */
279 __u64 ibm_dstnid; /* destination's NID */
280 __u64 ibm_dststamp; /* destination's incarnation */
283 kib_connparams_t connparams;
284 kib_immediate_msg_t immediate;
285 kib_putreq_msg_t putreq;
286 kib_putack_msg_t putack;
288 kib_completion_msg_t completion;
290 } WIRE_ATTR kib_msg_t;
292 #define IBLND_MSG_MAGIC LNET_PROTO_IB_MAGIC /* unique magic */
294 #define IBLND_MSG_VERSION 0x11
296 #define IBLND_MSG_CONNREQ 0xc0 /* connection request */
297 #define IBLND_MSG_CONNACK 0xc1 /* connection acknowledge */
298 #define IBLND_MSG_NOOP 0xd0 /* nothing (just credits) */
299 #define IBLND_MSG_IMMEDIATE 0xd1 /* immediate */
300 #define IBLND_MSG_PUT_REQ 0xd2 /* putreq (src->sink) */
301 #define IBLND_MSG_PUT_NAK 0xd3 /* completion (sink->src) */
302 #define IBLND_MSG_PUT_ACK 0xd4 /* putack (sink->src) */
303 #define IBLND_MSG_PUT_DONE 0xd5 /* completion (src->sink) */
304 #define IBLND_MSG_GET_REQ 0xd6 /* getreq (sink->src) */
305 #define IBLND_MSG_GET_DONE 0xd7 /* completion (src->sink: all OK) */
308 __u32 ibr_magic; /* sender's magic */
309 __u16 ibr_version; /* sender's version */
310 __u8 ibr_why; /* reject reason */
311 } WIRE_ATTR kib_rej_t;
314 /* connection rejection reasons */
315 #define IBLND_REJECT_CONN_RACE 1 /* You lost connection race */
316 #define IBLND_REJECT_NO_RESOURCES 2 /* Out of memory/conns etc */
317 #define IBLND_REJECT_FATAL 3 /* Anything else */
319 /***********************************************************************/
321 typedef struct kib_rx /* receive message */
323 struct list_head rx_list; /* queue for attention */
324 struct kib_conn *rx_conn; /* owning conn */
325 int rx_nob; /* # bytes received (-1 while posted) */
326 enum ib_wc_status rx_status; /* completion status */
327 kib_msg_t *rx_msg; /* message buffer (host vaddr) */
328 __u64 rx_msgaddr; /* message buffer (I/O addr) */
329 DECLARE_PCI_UNMAP_ADDR (rx_msgunmap); /* for dma_unmap_single() */
330 struct ib_recv_wr rx_wrq; /* receive work item... */
331 struct ib_sge rx_sge; /* ...and its memory */
334 #define IBLND_POSTRX_DONT_POST 0 /* don't post */
335 #define IBLND_POSTRX_NO_CREDIT 1 /* post: no credits */
336 #define IBLND_POSTRX_PEER_CREDIT 2 /* post: give peer back 1 credit */
337 #define IBLND_POSTRX_RSRVD_CREDIT 3 /* post: give myself back 1 reserved credit */
339 typedef struct kib_tx /* transmit message */
341 struct list_head tx_list; /* queue on idle_txs ibc_tx_queue etc. */
342 struct kib_conn *tx_conn; /* owning conn */
343 int tx_sending; /* # tx callbacks outstanding */
344 int tx_queued; /* queued for sending */
345 int tx_waiting; /* waiting for peer */
346 int tx_status; /* LNET completion status */
347 unsigned long tx_deadline; /* completion deadline */
348 __u64 tx_cookie; /* completion cookie */
349 lnet_msg_t *tx_lntmsg[2]; /* lnet msgs to finalize on completion */
350 kib_msg_t *tx_msg; /* message buffer (host vaddr) */
351 __u64 tx_msgaddr; /* message buffer (I/O addr) */
352 DECLARE_PCI_UNMAP_ADDR (tx_msgunmap); /* for dma_unmap_single() */
353 int tx_nwrq; /* # send work items */
354 #if IBLND_MAP_ON_DEMAND
355 struct ib_send_wr tx_wrq[2]; /* send work items... */
356 struct ib_sge tx_sge[2]; /* ...and their memory */
357 kib_rdma_desc_t tx_rd[1]; /* rdma descriptor */
358 __u64 *tx_pages; /* rdma phys page addrs */
359 struct ib_pool_fmr *tx_fmr; /* rdma mapping (mapped if != NULL) */
361 struct ib_send_wr *tx_wrq; /* send work items... */
362 struct ib_sge *tx_sge; /* ...and their memory */
363 kib_rdma_desc_t *tx_rd; /* rdma descriptor */
364 int tx_nfrags; /* # entries in... */
365 struct scatterlist *tx_frags; /* dma_map_sg descriptor */
366 int tx_dmadir; /* dma direction */
370 typedef struct kib_connvars
372 /* connection-in-progress variables */
376 typedef struct kib_conn
378 struct kib_peer *ibc_peer; /* owning peer */
379 struct list_head ibc_list; /* stash on peer's conn list */
380 struct list_head ibc_sched_list; /* schedule for attention */
381 __u64 ibc_incarnation; /* which instance of the peer */
382 atomic_t ibc_refcount; /* # users */
383 int ibc_state; /* what's happening */
384 int ibc_nsends_posted; /* # uncompleted sends */
385 int ibc_credits; /* # credits I have */
386 int ibc_outstanding_credits; /* # credits to return */
387 int ibc_reserved_credits;/* # ACK/DONE msg credits */
388 int ibc_comms_error; /* set on comms error */
389 int ibc_nrx:8; /* receive buffers owned */
390 int ibc_scheduled:1; /* scheduled for attention */
391 int ibc_ready:1; /* CQ callback fired */
392 unsigned long ibc_last_send; /* time of last send */
393 struct list_head ibc_early_rxs; /* rxs completed before ESTABLISHED */
394 struct list_head ibc_tx_queue; /* sends that need a credit */
395 struct list_head ibc_tx_queue_nocred;/* sends that don't need a credit */
396 struct list_head ibc_tx_queue_rsrvd; /* sends that need to reserve an ACK/DONE msg */
397 struct list_head ibc_active_txs; /* active tx awaiting completion */
398 spinlock_t ibc_lock; /* serialise */
399 kib_rx_t *ibc_rxs; /* the rx descs */
400 kib_pages_t *ibc_rx_pages; /* premapped rx msg pages */
402 struct rdma_cm_id *ibc_cmid; /* CM id */
403 struct ib_cq *ibc_cq; /* completion queue */
405 kib_connvars_t *ibc_connvars; /* in-progress connection state */
408 #define IBLND_CONN_INIT 0 /* being intialised */
409 #define IBLND_CONN_ACTIVE_CONNECT 1 /* active sending req */
410 #define IBLND_CONN_PASSIVE_WAIT 2 /* passive waiting for rtu */
411 #define IBLND_CONN_ESTABLISHED 3 /* connection established */
412 #define IBLND_CONN_CLOSING 4 /* being closed */
413 #define IBLND_CONN_DISCONNECTED 5 /* disconnected */
415 typedef struct kib_peer
417 struct list_head ibp_list; /* stash on global peer list */
418 lnet_nid_t ibp_nid; /* who's on the other end(s) */
419 lnet_ni_t *ibp_ni; /* LNet interface */
420 atomic_t ibp_refcount; /* # users */
421 struct list_head ibp_conns; /* all active connections */
422 struct list_head ibp_tx_queue; /* msgs waiting for a conn */
423 int ibp_connecting; /* current active connection attempts */
424 int ibp_accepting; /* current passive connection attempts */
425 int ibp_error; /* errno on closing this peer */
426 cfs_time_t ibp_last_alive; /* when (in jiffies) I was last alive */
430 extern kib_data_t kiblnd_data;
431 extern kib_tunables_t kiblnd_tunables;
433 #define kiblnd_conn_addref(conn) \
435 CDEBUG(D_NET, "conn[%p] (%d)++\n", \
436 (conn), atomic_read(&(conn)->ibc_refcount)); \
437 LASSERT(atomic_read(&(conn)->ibc_refcount) > 0); \
438 atomic_inc(&(conn)->ibc_refcount); \
441 #define kiblnd_conn_decref(conn) \
443 unsigned long flags; \
445 CDEBUG(D_NET, "conn[%p] (%d)--\n", \
446 (conn), atomic_read(&(conn)->ibc_refcount)); \
447 LASSERT(atomic_read(&(conn)->ibc_refcount) > 0); \
448 if (atomic_dec_and_test(&(conn)->ibc_refcount)) { \
449 spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); \
450 list_add_tail(&(conn)->ibc_list, \
451 &kiblnd_data.kib_connd_zombies); \
452 wake_up(&kiblnd_data.kib_connd_waitq); \
453 spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags); \
457 #define kiblnd_peer_addref(peer) \
459 CDEBUG(D_NET, "peer[%p] -> %s (%d)++\n", \
460 (peer), libcfs_nid2str((peer)->ibp_nid), \
461 atomic_read (&(peer)->ibp_refcount)); \
462 LASSERT(atomic_read(&(peer)->ibp_refcount) > 0); \
463 atomic_inc(&(peer)->ibp_refcount); \
466 #define kiblnd_peer_decref(peer) \
468 CDEBUG(D_NET, "peer[%p] -> %s (%d)--\n", \
469 (peer), libcfs_nid2str((peer)->ibp_nid), \
470 atomic_read (&(peer)->ibp_refcount)); \
471 LASSERT(atomic_read(&(peer)->ibp_refcount) > 0); \
472 if (atomic_dec_and_test(&(peer)->ibp_refcount)) \
473 kiblnd_destroy_peer(peer); \
476 static inline struct list_head *
477 kiblnd_nid2peerlist (lnet_nid_t nid)
479 unsigned int hash = ((unsigned int)nid) % kiblnd_data.kib_peer_hash_size;
481 return (&kiblnd_data.kib_peers [hash]);
485 kiblnd_peer_active (kib_peer_t *peer)
487 /* Am I in the peer hash table? */
488 return (!list_empty(&peer->ibp_list));
491 static inline kib_conn_t *
492 kiblnd_get_conn_locked (kib_peer_t *peer)
494 LASSERT (!list_empty(&peer->ibp_conns));
496 /* just return the first connection */
497 return list_entry(peer->ibp_conns.next, kib_conn_t, ibc_list);
501 kiblnd_send_keepalive(kib_conn_t *conn)
503 return (*kiblnd_tunables.kib_keepalive > 0) &&
504 time_after(jiffies, conn->ibc_last_send +
505 *kiblnd_tunables.kib_keepalive*HZ);
509 kiblnd_abort_receives(kib_conn_t *conn)
511 ib_modify_qp(conn->ibc_cmid->qp,
512 &kiblnd_data.kib_error_qpa, IB_QP_STATE);
515 /* CAVEAT EMPTOR: We rely on descriptor alignment to allow us to use the
516 * lowest bits of the work request id to stash the work item type. */
518 #define IBLND_WID_TX 0
519 #define IBLND_WID_RDMA 1
520 #define IBLND_WID_RX 2
521 #define IBLND_WID_MASK 3UL
524 kiblnd_ptr2wreqid (void *ptr, int type)
526 unsigned long lptr = (unsigned long)ptr;
528 LASSERT ((lptr & IBLND_WID_MASK) == 0);
529 LASSERT ((type & ~IBLND_WID_MASK) == 0);
530 return (__u64)(lptr | type);
534 kiblnd_wreqid2ptr (__u64 wreqid)
536 return (void *)(((unsigned long)wreqid) & ~IBLND_WID_MASK);
540 kiblnd_wreqid2type (__u64 wreqid)
542 return (wreqid & IBLND_WID_MASK);
546 kiblnd_set_conn_state (kib_conn_t *conn, int state)
548 conn->ibc_state = state;
552 #if IBLND_MAP_ON_DEMAND
554 kiblnd_rd_size (kib_rdma_desc_t *rd)
560 kiblnd_rd_size (kib_rdma_desc_t *rd)
565 for (i = size = 0; i < rd->rd_nfrags; i++)
566 size += rd->rd_frags[i].rf_nob;
572 int kiblnd_startup (lnet_ni_t *ni);
573 void kiblnd_shutdown (lnet_ni_t *ni);
574 int kiblnd_ctl (lnet_ni_t *ni, unsigned int cmd, void *arg);
576 int kiblnd_tunables_init(void);
577 void kiblnd_tunables_fini(void);
579 int kiblnd_connd (void *arg);
580 int kiblnd_scheduler(void *arg);
581 int kiblnd_thread_start (int (*fn)(void *arg), void *arg);
583 int kiblnd_alloc_pages (kib_pages_t **pp, int npages);
584 void kiblnd_free_pages (kib_pages_t *p);
586 int kiblnd_cm_callback(struct rdma_cm_id *cmid,
587 struct rdma_cm_event *event);
589 int kiblnd_create_peer (lnet_ni_t *ni, kib_peer_t **peerp, lnet_nid_t nid);
590 void kiblnd_destroy_peer (kib_peer_t *peer);
591 void kiblnd_destroy_dev (kib_dev_t *dev);
592 void kiblnd_unlink_peer_locked (kib_peer_t *peer);
593 void kiblnd_peer_alive (kib_peer_t *peer);
594 kib_peer_t *kiblnd_find_peer_locked (lnet_nid_t nid);
595 void kiblnd_peer_connect_failed (kib_peer_t *peer, int active, int error);
596 int kiblnd_close_stale_conns_locked (kib_peer_t *peer, __u64 incarnation);
598 void kiblnd_connreq_done(kib_conn_t *conn, int status);
599 kib_conn_t *kiblnd_create_conn (kib_peer_t *peer, struct rdma_cm_id *cmid,
601 void kiblnd_destroy_conn (kib_conn_t *conn);
602 void kiblnd_close_conn (kib_conn_t *conn, int error);
603 void kiblnd_close_conn_locked (kib_conn_t *conn, int error);
605 int kiblnd_init_rdma (lnet_ni_t *ni, kib_tx_t *tx, int type,
606 int nob, kib_rdma_desc_t *dstrd, __u64 dstcookie);
608 void kiblnd_queue_tx_locked (kib_tx_t *tx, kib_conn_t *conn);
609 void kiblnd_queue_tx (kib_tx_t *tx, kib_conn_t *conn);
610 void kiblnd_init_tx_msg (lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob);
611 void kiblnd_txlist_done (lnet_ni_t *ni, struct list_head *txlist, int status);
612 void kiblnd_check_sends (kib_conn_t *conn);
614 void kiblnd_qp_event(struct ib_event *event, void *arg);
615 void kiblnd_cq_event(struct ib_event *event, void *arg);
616 void kiblnd_cq_completion(struct ib_cq *cq, void *arg);
618 void kiblnd_init_msg (kib_msg_t *msg, int type, int body_nob);
619 void kiblnd_pack_msg (lnet_ni_t *ni, kib_msg_t *msg,
620 int credits, lnet_nid_t dstnid, __u64 dststamp);
621 int kiblnd_unpack_msg(kib_msg_t *msg, int nob);
622 int kiblnd_post_rx (kib_rx_t *rx, int credit);
624 int kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg);
625 int kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed,
626 unsigned int niov, struct iovec *iov, lnet_kiov_t *kiov,
627 unsigned int offset, unsigned int mlen, unsigned int rlen);