1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see [sun.com URL with a
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lnet/klnds/iiblnd/iiblnd.h
38 * Author: Eric Barton <eric@bartonsoftware.com>
42 # define EXPORT_SYMTAB
44 #ifndef AUTOCONF_INCLUDED
45 #include <linux/config.h>
47 #include <linux/module.h>
48 #include <linux/kernel.h>
50 #include <linux/string.h>
51 #include <linux/stat.h>
52 #include <linux/errno.h>
53 #include <linux/smp_lock.h>
54 #include <linux/unistd.h>
55 #include <linux/uio.h>
57 #include <asm/system.h>
58 #include <asm/uaccess.h>
61 #include <linux/init.h>
63 #include <linux/file.h>
64 #include <linux/stat.h>
65 #include <linux/list.h>
66 #include <linux/kmod.h>
67 #include <linux/sysctl.h>
69 #define DEBUG_SUBSYSTEM S_LND
71 #include <libcfs/libcfs.h>
72 #include <lnet/lnet.h>
73 #include <lnet/lib-lnet.h>
75 #include <linux/iba/ibt.h>
77 #define GCC_VERSION (__GNUC__ * 10000 \
78 + __GNUC_MINOR__ * 100 \
79 + __GNUC_PATCHLEVEL__)
81 /* Test for GCC > 3.2.2 */
82 #if GCC_VERSION <= 30202
83 /* GCC 3.2.2, and presumably several versions before it, will
84 * miscompile this driver. See
85 * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9853. */
86 #error Invalid GCC version. Must use GCC >= 3.2.3
90 # define IBNAL_N_SCHED num_online_cpus() /* # schedulers */
92 # define IBNAL_N_SCHED 1 /* # schedulers */
95 #define IBNAL_USE_FMR 0 /* map on demand v. use whole mem mapping */
96 #define KIBLND_DETAILED_DEBUG 0
98 /* tunables fixed at compile time */
99 #define IBNAL_PEER_HASH_SIZE 101 /* # peer lists */
100 #define IBNAL_RESCHED 100 /* # scheduler loops before reschedule */
101 #define IBNAL_MSG_QUEUE_SIZE 8 /* # messages/RDMAs in-flight */
102 #define IBNAL_CREDIT_HIGHWATER 7 /* when to eagerly return credits */
103 #define IBNAL_MSG_SIZE (4<<10) /* max size of queued messages (inc hdr) */
104 #define IBNAL_RDMA_BASE 0x0eeb0000
105 #define IBNAL_STARTING_PSN 1
108 /* 7 indicates infinite retry attempts, Infinicon recommended 5 */
109 #define IBNAL_RETRY 5 /* # times to retry */
110 #define IBNAL_RNR_RETRY 5 /* */
111 #define IBNAL_CM_RETRY 5 /* # times to retry connection */
112 #define IBNAL_FLOW_CONTROL 1
113 #define IBNAL_ACK_TIMEOUT 20 /* supposedly 4 secs */
114 #define IBNAL_EE_FLOW 1
115 #define IBNAL_LOCAL_SUB 1
116 #define IBNAL_FAILOVER_ACCEPTED 0
118 /************************/
119 /* derived constants... */
121 /* TX messages (shared by all connections) */
122 #define IBNAL_TX_MSGS() (*kibnal_tunables.kib_ntx)
123 #define IBNAL_TX_MSG_BYTES() (IBNAL_TX_MSGS() * IBNAL_MSG_SIZE)
124 #define IBNAL_TX_MSG_PAGES() ((IBNAL_TX_MSG_BYTES() + PAGE_SIZE - 1)/PAGE_SIZE)
127 # define IBNAL_MAX_RDMA_FRAGS 1
128 # define IBNAL_CONCURRENT_SENDS IBNAL_RX_MSGS
130 # define IBNAL_MAX_RDMA_FRAGS LNET_MAX_IOV
131 # define IBNAL_CONCURRENT_SENDS IBNAL_MSG_QUEUE_SIZE
134 /* RX messages (per connection) */
135 #define IBNAL_RX_MSGS (IBNAL_MSG_QUEUE_SIZE * 2)
136 #define IBNAL_RX_MSG_BYTES (IBNAL_RX_MSGS * IBNAL_MSG_SIZE)
137 #define IBNAL_RX_MSG_PAGES ((IBNAL_RX_MSG_BYTES + PAGE_SIZE - 1)/PAGE_SIZE)
139 #define IBNAL_CQ_ENTRIES() (IBNAL_TX_MSGS() * (1 + IBNAL_MAX_RDMA_FRAGS) + \
140 (IBNAL_RX_MSGS * *kibnal_tunables.kib_concurrent_peers))
144 char **kib_hca_basename; /* HCA base name */
145 char **kib_ipif_basename; /* IPoIB interface base name */
146 char **kib_service_name; /* global service name */
147 unsigned int *kib_service_number; /* global service number */
148 int *kib_min_reconnect_interval; /* min connect retry seconds... */
149 int *kib_max_reconnect_interval; /* max connect retry seconds */
150 int *kib_concurrent_peers; /* max # peers */
151 int *kib_cksum; /* checksum kib_msg_t? */
152 int *kib_timeout; /* comms timeout (seconds) */
153 int *kib_keepalive; /* keepalive timeout (seconds) */
154 int *kib_ntx; /* # tx descs */
155 int *kib_credits; /* # concurrent sends */
156 int *kib_peercredits; /* # concurrent sends to 1 peer */
157 int *kib_sd_retries; /* # concurrent sends to 1 peer */
158 int *kib_concurrent_sends; /* send work queue sizing */
159 #if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
160 cfs_sysctl_table_header_t *kib_sysctl; /* sysctl interface */
164 /* NB The Infinicon stack has specific typedefs for some things
165 * (e.g. IB_{L,R}_KEY), that just map back to __u32 etc */
168 int ibp_npages; /* # pages */
169 struct page *ibp_pages[0];
182 int kib_init; /* initialisation state */
183 __u64 kib_incarnation; /* which one am I */
184 int kib_shutdown; /* shut down? */
185 atomic_t kib_nthreads; /* # live threads */
186 lnet_ni_t *kib_ni; /* _the_ iib instance */
188 __u64 kib_port_guid; /* my GUID (lo 64 of GID)*/
189 __u16 kib_port_pkey; /* my pkey, whatever that is */
190 struct semaphore kib_listener_signal; /* signal completion */
191 IB_HANDLE kib_listener_cep; /* connection end point */
193 rwlock_t kib_global_lock; /* stabilize peer/conn ops */
194 int kib_ready; /* CQ callback fired */
195 int kib_checking_cq; /* a scheduler is checking the CQ */
197 struct list_head *kib_peers; /* hash table of all my known peers */
198 int kib_peer_hash_size; /* size of kib_peers */
199 atomic_t kib_npeers; /* # peers extant */
200 atomic_t kib_nconns; /* # connections extant */
202 struct list_head kib_connd_zombies; /* connections to free */
203 struct list_head kib_connd_conns; /* connections to progress */
204 struct list_head kib_connd_peers; /* peers waiting for a connection */
205 wait_queue_head_t kib_connd_waitq; /* connection daemon sleep here */
206 spinlock_t kib_connd_lock; /* serialise */
208 wait_queue_head_t kib_sched_waitq; /* schedulers sleep here */
209 spinlock_t kib_sched_lock; /* serialise */
211 struct kib_tx *kib_tx_descs; /* all the tx descriptors */
212 kib_pages_t *kib_tx_pages; /* premapped tx msg pages */
214 struct list_head kib_idle_txs; /* idle tx descriptors */
215 __u64 kib_next_tx_cookie; /* RDMA completion cookie */
216 spinlock_t kib_tx_lock; /* serialise */
218 IB_HANDLE kib_hca; /* The HCA */
219 int kib_port; /* port on the device */
220 IB_HANDLE kib_pd; /* protection domain */
221 IB_HANDLE kib_sd; /* SD handle */
222 IB_HANDLE kib_cq; /* completion queue */
223 kib_md_t kib_whole_mem; /* whole-mem registration */
225 int kib_hca_idx; /* my HCA number */
226 uint64 kib_hca_guids[8]; /* all the HCA guids */
227 IB_CA_ATTRIBUTES kib_hca_attrs; /* where to get HCA attrs */
229 COMMAND_CONTROL_PARAMETERS kib_sdretry; /* control SD query retries */
232 #define IBNAL_INIT_NOTHING 0
233 #define IBNAL_INIT_DATA 1
234 #define IBNAL_INIT_LIB 2
235 #define IBNAL_INIT_HCA 3
236 #define IBNAL_INIT_PORTATTRS 4
237 #define IBNAL_INIT_SD 5
238 #define IBNAL_INIT_PD 6
239 #define IBNAL_INIT_MD 7
240 #define IBNAL_INIT_TXD 8
241 #define IBNAL_INIT_CQ 9
242 #define IBNAL_INIT_ALL 10
244 /************************************************************************
245 * Wire message structs.
246 * These are sent in sender's byte order (i.e. receiver flips).
247 * CAVEAT EMPTOR: other structs communicated between nodes (e.g. MAD
248 * private data and SM service info), is LE on the wire.
251 typedef struct kib_connparams
253 __u32 ibcp_queue_depth;
254 __u32 ibcp_max_msg_size;
255 __u32 ibcp_max_frags;
256 } WIRE_ATTR kib_connparams_t;
260 lnet_hdr_t ibim_hdr; /* portals header */
261 char ibim_payload[0]; /* piggy-backed payload */
262 } WIRE_ATTR kib_immediate_msg_t;
267 __u64 rd_addr; /* IO VMA address */
268 __u32 rd_nob; /* # of bytes */
269 __u32 rd_key; /* remote key */
270 } WIRE_ATTR kib_rdma_desc_t;
274 __u32 rf_nob; /* # of bytes */
275 __u64 rf_addr; /* remote io vaddr */
276 } WIRE_ATTR kib_rdma_frag_t;
280 __u32 rd_key; /* local/remote key */
281 __u32 rd_nfrag; /* # fragments */
282 kib_rdma_frag_t rd_frags[0]; /* buffer frags */
283 } WIRE_ATTR kib_rdma_desc_t;
288 lnet_hdr_t ibprm_hdr; /* LNET header */
289 __u64 ibprm_cookie; /* opaque completion cookie */
290 } WIRE_ATTR kib_putreq_msg_t;
294 __u64 ibpam_src_cookie; /* reflected completion cookie */
295 __u64 ibpam_dst_cookie; /* opaque completion cookie */
296 kib_rdma_desc_t ibpam_rd; /* sender's sink buffer */
297 } WIRE_ATTR kib_putack_msg_t;
301 lnet_hdr_t ibgm_hdr; /* LNET header */
302 __u64 ibgm_cookie; /* opaque completion cookie */
303 kib_rdma_desc_t ibgm_rd; /* sender's sink buffer */
304 } WIRE_ATTR kib_get_msg_t;
308 __u64 ibcm_cookie; /* opaque completion cookie */
309 __u32 ibcm_status; /* completion status */
310 } WIRE_ATTR kib_completion_msg_t;
314 /* First 2 fields fixed FOR ALL TIME */
315 __u32 ibm_magic; /* I'm an openibnal message */
316 __u16 ibm_version; /* this is my version number */
318 __u8 ibm_type; /* msg type */
319 __u8 ibm_credits; /* returned credits */
320 __u32 ibm_nob; /* # bytes in whole message */
321 __u32 ibm_cksum; /* checksum (0 == no checksum) */
322 __u64 ibm_srcnid; /* sender's NID */
323 __u64 ibm_srcstamp; /* sender's incarnation */
324 __u64 ibm_dstnid; /* destination's NID */
325 __u64 ibm_dststamp; /* destination's incarnation */
326 __u64 ibm_seq; /* sequence number */
329 kib_connparams_t connparams;
330 kib_immediate_msg_t immediate;
331 kib_putreq_msg_t putreq;
332 kib_putack_msg_t putack;
334 kib_completion_msg_t completion;
336 } WIRE_ATTR kib_msg_t;
338 #define IBNAL_MSG_MAGIC LNET_PROTO_IIB_MAGIC /* unique magic */
339 #define IBNAL_MSG_VERSION 2 /* current protocol version */
340 #define IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD 1 /* previous version */
342 #define IBNAL_MSG_CONNREQ 0xc0 /* connection request */
343 #define IBNAL_MSG_CONNACK 0xc1 /* connection acknowledge */
344 #define IBNAL_MSG_NOOP 0xd0 /* nothing (just credits) */
345 #define IBNAL_MSG_IMMEDIATE 0xd1 /* immediate */
346 #define IBNAL_MSG_PUT_REQ 0xd2 /* putreq (src->sink) */
347 #define IBNAL_MSG_PUT_NAK 0xd3 /* completion (sink->src) */
348 #define IBNAL_MSG_PUT_ACK 0xd4 /* putack (sink->src) */
349 #define IBNAL_MSG_PUT_DONE 0xd5 /* completion (src->sink) */
350 #define IBNAL_MSG_GET_REQ 0xd6 /* getreq (sink->src) */
351 #define IBNAL_MSG_GET_DONE 0xd7 /* completion (src->sink: all OK) */
353 /* connection rejection reasons */
354 #define IBNAL_REJECT_CONN_RACE 0 /* You lost connection race */
355 #define IBNAL_REJECT_NO_RESOURCES 1 /* Out of memory/conns etc */
356 #define IBNAL_REJECT_FATAL 2 /* Anything else */
358 /***********************************************************************/
360 typedef struct kib_rx /* receive message */
362 struct list_head rx_list; /* queue for attention */
363 struct kib_conn *rx_conn; /* owning conn */
364 int rx_nob; /* # bytes received (-1 while posted) */
365 __u64 rx_hca_msg; /* pre-mapped buffer (hca vaddr) */
366 kib_msg_t *rx_msg; /* pre-mapped buffer (host vaddr) */
368 IB_LOCAL_DATASEGMENT rx_gl; /* and its memory */
371 typedef struct kib_tx /* transmit message */
373 struct list_head tx_list; /* queue on idle_txs ibc_tx_queue etc. */
374 struct kib_conn *tx_conn; /* owning conn */
375 int tx_mapped; /* mapped for RDMA? */
376 int tx_sending; /* # tx callbacks outstanding */
377 int tx_queued; /* queued for sending */
378 int tx_waiting; /* waiting for peer */
379 int tx_status; /* completion status */
380 unsigned long tx_deadline; /* completion deadline */
381 __u64 tx_cookie; /* completion cookie */
382 lnet_msg_t *tx_lntmsg[2]; /* lnet msgs to finalize on completion */
383 kib_msg_t *tx_msg; /* pre-mapped buffer (host vaddr) */
384 __u64 tx_hca_msg; /* pre-mapped buffer (HCA vaddr) */
385 int tx_nwrq; /* # send work items */
387 IB_WORK_REQ2 tx_wrq[2]; /* send work items... */
388 IB_LOCAL_DATASEGMENT tx_gl[2]; /* ...and their memory */
389 kib_rdma_desc_t tx_rd[1]; /* rdma descriptor */
390 kib_md_t tx_md; /* mapping */
391 __u64 *tx_pages; /* page phys addrs */
393 IB_WORK_REQ2 *tx_wrq; /* send work items... */
394 IB_LOCAL_DATASEGMENT *tx_gl; /* ...and their memory */
395 kib_rdma_desc_t *tx_rd; /* rdma descriptor (src buffers) */
401 /* scratchpad during connection establishment */
402 IB_QP_ATTRIBUTES_QUERY cv_qpattrs;
404 IB_SERVICE_RECORD cv_svcrec;
405 IB_PATH_RECORD cv_path;
406 CM_CONN_INFO cv_cmci;
409 typedef struct kib_conn
411 struct kib_peer *ibc_peer; /* owning peer */
412 struct list_head ibc_list; /* stash on peer's conn list */
413 __u64 ibc_incarnation; /* which instance of the peer */
414 __u64 ibc_txseq; /* tx sequence number */
415 __u64 ibc_rxseq; /* rx sequence number */
416 __u32 ibc_version; /* peer protocol version */
417 atomic_t ibc_refcount; /* # users */
418 int ibc_state; /* what's happening */
419 int ibc_nsends_posted; /* # uncompleted sends */
420 int ibc_credits; /* # credits I have */
421 int ibc_outstanding_credits; /* # credits to return */
422 int ibc_reserved_credits; /* # credits for ACK/DONE msgs */
423 unsigned long ibc_last_send; /* time of last send */
424 struct list_head ibc_early_rxs; /* rxs completed before ESTABLISHED */
425 struct list_head ibc_tx_queue_nocred; /* sends that don't need a cred */
426 struct list_head ibc_tx_queue_rsrvd; /* sends that need a reserved cred */
427 struct list_head ibc_tx_queue; /* send queue */
428 struct list_head ibc_active_txs; /* active tx awaiting completion */
429 spinlock_t ibc_lock; /* serialise */
430 kib_rx_t *ibc_rxs; /* the rx descs */
431 kib_pages_t *ibc_rx_pages; /* premapped rx msg pages */
432 IB_HANDLE ibc_qp; /* queue pair */
433 IB_HANDLE ibc_cep; /* CM endpoint */
434 kib_connvars_t *ibc_cvars; /* connection scratchpad */
437 #define IBNAL_CONN_INIT_NOTHING 0 /* initial state */
438 #define IBNAL_CONN_INIT_QP 1 /* ibc_qp set up */
439 #define IBNAL_CONN_CONNECTING 2 /* started to connect */
440 #define IBNAL_CONN_ESTABLISHED 3 /* connection established */
441 #define IBNAL_CONN_DISCONNECTING 4 /* to send disconnect req */
442 #define IBNAL_CONN_DISCONNECTED 5 /* no more QP or CM traffic */
444 /* types of connection */
445 #define IBNAL_CONN_ACTIVE 0 /* active connect */
446 #define IBNAL_CONN_PASSIVE 1 /* passive connect */
447 #define IBNAL_CONN_WAITING 2 /* waiting for connect */
449 typedef struct kib_peer
451 struct list_head ibp_list; /* stash on global peer list */
452 struct list_head ibp_connd_list; /* schedule on kib_connd_peers */
453 lnet_nid_t ibp_nid; /* who's on the other end(s) */
454 atomic_t ibp_refcount; /* # users */
455 int ibp_persistence; /* "known" peer refs */
456 int ibp_version; /* protocol version */
457 struct list_head ibp_conns; /* all active connections */
458 struct list_head ibp_tx_queue; /* msgs waiting for a conn */
459 int ibp_connecting; /* active connects in progress */
460 int ibp_accepting; /* passive connects in progress */
461 int ibp_passivewait; /* waiting for peer to connect */
462 unsigned long ibp_passivewait_deadline; /* when passive wait must complete */
463 unsigned long ibp_reconnect_time; /* when reconnect may be attempted */
464 unsigned long ibp_reconnect_interval; /* exponential backoff */
465 int ibp_error; /* errno on closing this peer */
466 cfs_time_t ibp_last_alive; /* when (in jiffies) I was last alive */
470 extern kib_data_t kibnal_data;
471 extern kib_tunables_t kibnal_tunables;
473 /******************************************************************************/
475 /* these are purposely avoiding using local vars so they don't increase
476 * stack consumption. */
478 #define kibnal_conn_addref(conn) \
480 CDEBUG(D_NET, "conn[%p] (%d)++\n", \
481 (conn), atomic_read(&(conn)->ibc_refcount)); \
482 LASSERT(atomic_read(&(conn)->ibc_refcount) > 0); \
483 atomic_inc(&(conn)->ibc_refcount); \
486 #define kibnal_conn_decref(conn) \
488 unsigned long flags; \
490 CDEBUG(D_NET, "conn[%p] (%d)--\n", \
491 (conn), atomic_read(&(conn)->ibc_refcount)); \
492 LASSERT(atomic_read(&(conn)->ibc_refcount) > 0); \
493 if (atomic_dec_and_test(&(conn)->ibc_refcount)) { \
494 spin_lock_irqsave(&kibnal_data.kib_connd_lock, flags); \
495 list_add_tail(&(conn)->ibc_list, \
496 &kibnal_data.kib_connd_zombies); \
497 wake_up(&kibnal_data.kib_connd_waitq); \
498 spin_unlock_irqrestore(&kibnal_data.kib_connd_lock, flags); \
502 #define kibnal_peer_addref(peer) \
504 CDEBUG(D_NET, "peer[%p] -> %s (%d)++\n", \
505 (peer), libcfs_nid2str((peer)->ibp_nid), \
506 atomic_read (&(peer)->ibp_refcount)); \
507 LASSERT(atomic_read(&(peer)->ibp_refcount) > 0); \
508 atomic_inc(&(peer)->ibp_refcount); \
511 #define kibnal_peer_decref(peer) \
513 CDEBUG(D_NET, "peer[%p] -> %s (%d)--\n", \
514 (peer), libcfs_nid2str((peer)->ibp_nid), \
515 atomic_read (&(peer)->ibp_refcount)); \
516 LASSERT(atomic_read(&(peer)->ibp_refcount) > 0); \
517 if (atomic_dec_and_test(&(peer)->ibp_refcount)) \
518 kibnal_destroy_peer(peer); \
521 /******************************************************************************/
523 static inline struct list_head *
524 kibnal_nid2peerlist (lnet_nid_t nid)
526 unsigned int hash = ((unsigned int)nid) % kibnal_data.kib_peer_hash_size;
528 return (&kibnal_data.kib_peers [hash]);
532 kibnal_peer_active(kib_peer_t *peer)
534 /* Am I in the peer hash table? */
535 return (!list_empty(&peer->ibp_list));
539 kibnal_peer_connecting(kib_peer_t *peer)
541 /* Am I expecting a connection to materialise? */
542 return (peer->ibp_connecting != 0 ||
543 peer->ibp_accepting != 0 ||
544 peer->ibp_passivewait);
548 kibnal_queue_tx_locked (kib_tx_t *tx, kib_conn_t *conn)
552 LASSERT (tx->tx_nwrq > 0); /* work items set up */
553 LASSERT (!tx->tx_queued); /* not queued for sending already */
556 tx->tx_deadline = jiffies + (*kibnal_tunables.kib_timeout * HZ);
558 if (tx->tx_conn == NULL) {
559 kibnal_conn_addref(conn);
561 LASSERT (tx->tx_msg->ibm_type != IBNAL_MSG_PUT_DONE);
563 LASSERT (tx->tx_conn == conn);
564 LASSERT (tx->tx_msg->ibm_type == IBNAL_MSG_PUT_DONE);
567 if (conn->ibc_version == IBNAL_MSG_VERSION_RDMAREPLYNOTRSRVD) {
568 /* All messages have simple credit control */
569 q = &conn->ibc_tx_queue;
571 LASSERT (conn->ibc_version == IBNAL_MSG_VERSION);
573 switch (tx->tx_msg->ibm_type) {
574 case IBNAL_MSG_PUT_REQ:
575 case IBNAL_MSG_GET_REQ:
576 /* RDMA request: reserve a buffer for the RDMA reply
578 q = &conn->ibc_tx_queue_rsrvd;
581 case IBNAL_MSG_PUT_NAK:
582 case IBNAL_MSG_PUT_ACK:
583 case IBNAL_MSG_PUT_DONE:
584 case IBNAL_MSG_GET_DONE:
585 /* RDMA reply/completion: no credits; peer has reserved
587 q = &conn->ibc_tx_queue_nocred;
591 case IBNAL_MSG_IMMEDIATE:
592 /* Otherwise: consume a credit before sending */
593 q = &conn->ibc_tx_queue;
602 list_add_tail(&tx->tx_list, q);
606 kibnal_send_keepalive(kib_conn_t *conn)
608 return (*kibnal_tunables.kib_keepalive > 0) &&
609 time_after(jiffies, conn->ibc_last_send +
610 *kibnal_tunables.kib_keepalive*HZ);
613 #define KIBNAL_SERVICE_KEY_MASK (IB_SERVICE_RECORD_COMP_SERVICENAME | \
614 IB_SERVICE_RECORD_COMP_SERVICEDATA8_1 | \
615 IB_SERVICE_RECORD_COMP_SERVICEDATA8_2 | \
616 IB_SERVICE_RECORD_COMP_SERVICEDATA8_3 | \
617 IB_SERVICE_RECORD_COMP_SERVICEDATA8_4 | \
618 IB_SERVICE_RECORD_COMP_SERVICEDATA8_5 | \
619 IB_SERVICE_RECORD_COMP_SERVICEDATA8_6 | \
620 IB_SERVICE_RECORD_COMP_SERVICEDATA8_7 | \
621 IB_SERVICE_RECORD_COMP_SERVICEDATA8_8)
624 kibnal_service_nid_field(IB_SERVICE_RECORD *srv)
626 /* must be consistent with KIBNAL_SERVICE_KEY_MASK */
627 return (__u64 *)srv->ServiceData8;
631 kibnal_set_service_keys(IB_SERVICE_RECORD *srv, lnet_nid_t nid)
633 char *svc_name = *kibnal_tunables.kib_service_name;
635 LASSERT (strlen(svc_name) < sizeof(srv->ServiceName));
636 memset (srv->ServiceName, 0, sizeof(srv->ServiceName));
637 strcpy (srv->ServiceName, svc_name);
639 *kibnal_service_nid_field(srv) = cpu_to_le64(nid);
642 /* CAVEAT EMPTOR: We rely on tx/rx descriptor alignment to allow us to use the
643 * lowest 2 bits of the work request id to stash the work item type (the op
644 * field is not valid when the wc completes in error). */
646 #define IBNAL_WID_TX 0
647 #define IBNAL_WID_RX 1
648 #define IBNAL_WID_RDMA 2
649 #define IBNAL_WID_MASK 3UL
652 kibnal_ptr2wreqid (void *ptr, int type)
654 unsigned long lptr = (unsigned long)ptr;
656 LASSERT ((lptr & IBNAL_WID_MASK) == 0);
657 LASSERT ((type & ~IBNAL_WID_MASK) == 0);
658 return (__u64)(lptr | type);
662 kibnal_wreqid2ptr (__u64 wreqid)
664 return (void *)(((unsigned long)wreqid) & ~IBNAL_WID_MASK);
668 kibnal_wreqid2type (__u64 wreqid)
670 return (wreqid & IBNAL_WID_MASK);
674 kibnal_set_conn_state (kib_conn_t *conn, int state)
676 CDEBUG(D_NET,"%p state %d\n", conn, state);
677 conn->ibc_state = state;
684 kibnal_rd_size (kib_rdma_desc_t *rd)
691 kibnal_rd_size (kib_rdma_desc_t *rd)
696 for (i = size = 0; i < rd->rd_nfrag; i++)
697 size += rd->rd_frags[i].rf_nob;
703 int kibnal_startup (lnet_ni_t *ni);
704 void kibnal_shutdown (lnet_ni_t *ni);
705 int kibnal_ctl(lnet_ni_t *ni, unsigned int cmd, void *arg);
706 int kibnal_send (lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg);
707 int kibnal_eager_recv (lnet_ni_t *ni, void *private,
708 lnet_msg_t *lntmsg, void **new_private);
709 int kibnal_recv (lnet_ni_t *ni, void *private, lnet_msg_t *msg,
710 int delayed, unsigned int niov,
711 struct iovec *iov, lnet_kiov_t *kiov,
712 unsigned int offset, unsigned int mlen, unsigned int rlen);
713 void kibnal_init_msg(kib_msg_t *msg, int type, int body_nob);
714 void kibnal_pack_msg(kib_msg_t *msg, __u32 version, int credits,
715 lnet_nid_t dstnid, __u64 dststamp, __u64 seq);
716 void kibnal_pack_connmsg(kib_msg_t *msg, __u32 version, int nob, int type,
717 lnet_nid_t dstnid, __u64 dststamp);
718 int kibnal_unpack_msg(kib_msg_t *msg, __u32 expected_version, int nob);
719 IB_HANDLE kibnal_create_cep(lnet_nid_t nid);
720 int kibnal_create_peer (kib_peer_t **peerp, lnet_nid_t nid);
721 void kibnal_destroy_peer (kib_peer_t *peer);
722 kib_peer_t *kibnal_find_peer_locked (lnet_nid_t nid);
723 int kibnal_del_peer (lnet_nid_t nid);
724 void kibnal_peer_alive (kib_peer_t *peer);
725 void kibnal_unlink_peer_locked (kib_peer_t *peer);
726 int kibnal_add_persistent_peer (lnet_nid_t nid);
727 int kibnal_close_stale_conns_locked (kib_peer_t *peer,
729 int kibnal_conn_rts(kib_conn_t *conn,
730 __u32 qpn, __u8 resp_res, __u8 init_depth, __u32 psn);
731 kib_conn_t *kibnal_create_conn (lnet_nid_t nid, int proto_version);
732 void kibnal_destroy_conn (kib_conn_t *conn);
733 void kibnal_listen_callback(IB_HANDLE cep, CM_CONN_INFO *info, void *arg);
734 int kibnal_alloc_pages (kib_pages_t **pp, int npages);
735 void kibnal_free_pages (kib_pages_t *p);
736 void kibnal_queue_tx (kib_tx_t *tx, kib_conn_t *conn);
737 void kibnal_txlist_done (struct list_head *txlist, int status);
738 int kibnal_post_receives (kib_conn_t *conn);
739 int kibnal_init_rdma (kib_tx_t *tx, int type, int nob,
740 kib_rdma_desc_t *dstrd, __u64 dstcookie);
741 void kibnal_check_sends (kib_conn_t *conn);
742 void kibnal_close_conn_locked (kib_conn_t *conn, int error);
743 int kibnal_thread_start (int (*fn)(void *arg), void *arg);
744 int kibnal_scheduler(void *arg);
745 int kibnal_connd (void *arg);
746 void kibnal_init_tx_msg (kib_tx_t *tx, int type, int body_nob);
747 void kibnal_close_conn (kib_conn_t *conn, int why);
748 void kibnal_start_active_rdma (int type, int status,
749 kib_rx_t *rx, lnet_msg_t *lntmsg,
751 struct iovec *iov, lnet_kiov_t *kiov,
752 unsigned int offset, unsigned int nob);
753 void kibnal_hca_async_callback (void *hca_arg, IB_EVENT_RECORD *ev);
754 void kibnal_hca_callback (void *hca_arg, void *cq_arg);
755 int kibnal_tunables_init (void);
756 void kibnal_tunables_fini (void);