1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 2002-2003, Network Appliance, Inc. All rights reserved.
24  */
25 
26 /*
27  * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
28  */
29 
30 /*
31  *
32  * HEADER: dapl.h
33  *
34  * PURPOSE: defines common data structures for the DAPL reference implemenation
35  *
36  * Description: This file describes the working data structures used within
37  *              DAPL RI.
38  *
39  */
40 
41 #ifndef _DAPL_H_
42 #define	_DAPL_H_
43 
44 #ifdef __cplusplus
45 extern "C" {
46 #endif
47 
48 #include <sys/types.h>
49 #include <sys/byteorder.h>
50 
51 #include <dat/udat.h>
52 #include <dat/dat_registry.h>
53 #include "dapl_osd.h"
54 #include "dapl_debug.h"
55 #include "dapl_tavor_ibtf.h"
56 
57 
58 /*
59  * The HTOBE_xx() macro converts data from host order to big endian
60  * order and hence uses the BE_xx macros to do the byte swapping.
61  *
62  * The BETOH_xx() macro converts data from big endian order to host
63  * order. This is used when data is read from CQs or QPs. Due to the
64  * self-inversing nature of byte swapping routines BE_xx macros have
65  * the effect of converting big endian to host byte order which can
66  * be big endian or little endian.
67  * eg.	On i386 BE_64(val64_be) = val64_le
68  *	On sparc BE_64(val64_be) = val64_be.
69  *
70  * Tavor is a big endian device, all the buffer manipulation for
71  * QPs, CQs and the doorbell page needs to be aware of this.
72  *
73  */
74 #if defined(__amd64) || defined(__i386)
75 /* use inline code to get performance of bswap* instructions */
76 
77 #if !defined(__lint) && defined(__GNUC__)
78 /* use GNU inline */
79 	/* works for both i386 and amd64 */
dapls_byteswap32(uint32_t value)80 	static __inline__ uint32_t dapls_byteswap32(uint32_t value)
81 	{
82 		__asm__("bswap %0" : "+r" (value));
83 		return (value);
84 	}
85 
86 #if defined(__amd64)
87 
dapls_byteswap64(uint64_t value)88 	static __inline__ uint64_t dapls_byteswap64(uint64_t value)
89 	{
90 		__asm__("bswapq %0" : "+r" (value));
91 		return (value);
92 	}
93 
94 #else /* defined(__i386) */
95 
dapls_byteswap64(uint64_t value)96 	static __inline__ uint64_t dapls_byteswap64(uint64_t value)
97 	{
98 		union {
99 			struct { uint32_t a, b; } s;
100 			uint64_t u;
101 		} v;
102 		v.u = value;
103 		__asm__("bswap %0 ; bswap %1 ; xchgl %0,%1"
104 		    : "=r" (v.s.a), "=r" (v.s.b)
105 		    : "0" (v.s.a), "1" (v.s.b));
106 		return (v.u);
107 	}
108 #endif
109 #endif	/* !defined(__lint) && defined(__GNUC__) */
110 
111 #define	HTOBE_64(x)	dapls_byteswap64(x)
112 #define	HTOBE_32(x)	dapls_byteswap32(x)
113 #define	BETOH_64(x)	dapls_byteswap64(x)
114 #define	BETOH_32(x)	dapls_byteswap32(x)
115 
116 #else	/* defined(__amd64) || defined(__i386) */
117 
118 /* These are identity (do nothing) on big-endian machines. */
119 
120 #define	HTOBE_64(x)	BE_64((x))
121 #define	HTOBE_32(x)	BE_32((x))
122 #define	BETOH_64(x)	BE_64((x))
123 #define	BETOH_32(x)	BE_32((x))
124 
125 #endif	/* defined(__amd64) || defined(__i386) */
126 
127 /*
128  *
129  * Enumerations
130  *
131  */
132 
133 typedef enum dapl_magic {
134 	/* magic number values for verification & debug */
135 	DAPL_MAGIC_IA = 0x1afeF00d,
136 	DAPL_MAGIC_EVD = 0x2eedFace,
137 	DAPL_MAGIC_EP = 0x3eadBabe,
138 	DAPL_MAGIC_LMR = 0x4eefCafe,
139 	DAPL_MAGIC_RMR = 0x5BadCafe,
140 	DAPL_MAGIC_PZ = 0x6eafBeef,
141 	DAPL_MAGIC_PSP = 0x7eadeD0c,
142 	DAPL_MAGIC_RSP = 0x1ab4Feed,
143 	DAPL_MAGIC_CR = 0x2e12Cee1,
144 	DAPL_MAGIC_CR_DESTROYED = 0x312bDead,
145 	DAPL_MAGIC_CNO = 0x4eadF00d,
146 	DAPL_MAGIC_EP_EXIT = 0x5abeDead,
147 	DAPL_MAGIC_SRQ = 0x5eedFace,
148 	DAPL_MAGIC_INVALID = 0x6FFFFFFF
149 } DAPL_MAGIC;
150 
151 typedef enum dapl_evd_state {
152 	DAPL_EVD_STATE_TERMINAL,
153 	DAPL_EVD_STATE_INITIAL,
154 	DAPL_EVD_STATE_OPEN,
155 	DAPL_EVD_STATE_WAITED,
156 	DAPL_EVD_STATE_DEAD = 0xDEAD
157 } DAPL_EVD_STATE;
158 
159 typedef enum dapl_evd_completion {
160 	DAPL_EVD_STATE_INIT,
161 	DAPL_EVD_STATE_SOLICITED_WAIT,
162 	DAPL_EVD_STATE_THRESHOLD,
163 	DAPL_EVD_STATE_UNSIGNALLED
164 } DAPL_EVD_COMPLETION;
165 
166 typedef enum dapl_cno_state {
167 	DAPL_CNO_STATE_UNTRIGGERED,
168 	DAPL_CNO_STATE_TRIGGERED,
169 	DAPL_CNO_STATE_DEAD = 0x7eadFeed
170 } DAPL_CNO_STATE;
171 
172 typedef enum dapl_qp_state {
173 	DAPL_QP_STATE_UNCONNECTED,
174 	DAPL_QP_STATE_RESERVED,
175 	DAPL_QP_STATE_PASSIVE_CONNECTION_PENDING,
176 	DAPL_QP_STATE_ACTIVE_CONNECTION_PENDING,
177 	DAPL_QP_STATE_TENTATIVE_CONNECTION_PENDING,
178 	DAPL_QP_STATE_CONNECTED,
179 	DAPL_QP_STATE_DISCONNECT_PENDING,
180 	DAPL_QP_STATE_ERROR,
181 	DAPL_QP_STATE_NOT_REUSABLE,
182 	DAPL_QP_STATE_FREE
183 } DAPL_QP_STATE;
184 
185 
186 /*
187  *
188  * Constants
189  *
190  */
191 
192 /*
193  * number of HCAs allowed
194  */
195 #define	DAPL_MAX_HCA_COUNT		4
196 
197 /*
198  * Configures the RMR bind evd restriction
199  */
200 #define	DAPL_RMR_BIND_EVD_RESTRICTION	DAT_RMR_EVD_SAME_AS_REQUEST_EVD
201 
202 /*
203  * special qp_state indicating the EP does not have a QP attached yet
204  */
205 #define	DAPL_QP_STATE_UNATTACHED	0xFFF0
206 
207 /*
208  *
209  * Macros
210  *
211  */
212 
213 /*
214  * Simple macro to verify a handle is bad.
215  * - pointer's magic number is wrong
216  * - both pointer is NULL and not word aligned checked by the registry
217  */
218 #define	DAPL_BAD_HANDLE(h, magicNum) (				\
219 	    (((DAPL_HEADER *)(h))->magic != (magicNum)))
220 
221 #define	DAPL_MIN(a, b)		(((a) < (b)) ? (a) : (b))
222 #define	DAPL_MAX(a, b)		(((a) > (b)) ? (a) : (b))
223 
224 #define	DAT_ERROR(Type, SubType) \
225 	((DAT_RETURN)(DAT_CLASS_ERROR | (Type) | (SubType)))
226 
227 /*
228  *
229  * Typedefs
230  *
231  */
232 
233 typedef	struct dapl_llist_entry DAPL_LLIST_ENTRY;
234 typedef	DAPL_LLIST_ENTRY *DAPL_LLIST_HEAD;
235 typedef	struct dapl_ring_buffer DAPL_RING_BUFFER;
236 typedef	struct dapl_cookie_buffer DAPL_COOKIE_BUFFER;
237 
238 typedef	struct dapl_hash_table DAPL_HASH_TABLE;
239 typedef	struct dapl_hash_table *DAPL_HASH_TABLEP;
240 typedef	DAT_UINT64 DAPL_HASH_KEY;
241 typedef	void *DAPL_HASH_DATA;
242 
243 typedef	struct dapl_hca DAPL_HCA;
244 
245 typedef	struct dapl_header DAPL_HEADER;
246 
247 typedef	struct dapl_ia DAPL_IA;
248 typedef	struct dapl_cno DAPL_CNO;
249 typedef	struct dapl_evd DAPL_EVD;
250 typedef	struct dapl_ep DAPL_EP;
251 typedef	struct dapl_pz DAPL_PZ;
252 typedef	struct dapl_lmr DAPL_LMR;
253 typedef	struct dapl_rmr DAPL_RMR;
254 typedef	struct dapl_sp DAPL_SP;
255 typedef	struct dapl_cr DAPL_CR;
256 typedef struct dapl_srq DAPL_SRQ;
257 
258 typedef	struct dapl_cookie DAPL_COOKIE;
259 typedef	struct dapl_dto_cookie DAPL_DTO_COOKIE;
260 typedef	struct dapl_rmr_cookie DAPL_RMR_COOKIE;
261 
262 typedef	void (*DAPL_CONNECTION_STATE_HANDLER)(IN DAPL_EP *,
263 	IN ib_cm_events_t,
264 	IN const void *,
265 	OUT DAT_EVENT *);
266 
267 
268 /*
269  *
270  * Structures
271  *
272  */
273 
274 struct dapl_llist_entry {
275 	struct dapl_llist_entry *flink;
276 	struct dapl_llist_entry *blink;
277 	void *data;
278 	DAPL_LLIST_HEAD *list_head;	/* for consistency checking */
279 };
280 
281 struct dapl_ring_buffer {
282 	void **base;		/* base of element array */
283 	DAT_COUNT lim;		/* mask, number of entries - 1 */
284 	DAPL_ATOMIC head;	/* head pointer index */
285 	DAPL_ATOMIC tail;	/* tail pointer index */
286 	DAPL_OS_LOCK lock;	/* lock */
287 };
288 
289 struct dapl_cookie_buffer {
290 	DAPL_COOKIE *pool;
291 	DAT_COUNT pool_size;
292 	DAPL_ATOMIC head;
293 	DAPL_ATOMIC tail;
294 };
295 
296 typedef DAT_RETURN (*DAPL_POST_SEND)(DAPL_EP *, ibt_send_wr_t *, boolean_t);
297 typedef DAT_RETURN (*DAPL_POST_RECV)(DAPL_EP *, ibt_recv_wr_t *, boolean_t);
298 typedef DAT_RETURN (*DAPL_POST_SRQ)(DAPL_SRQ *, ibt_recv_wr_t *, boolean_t);
299 typedef void (*DAPL_CQ_PEEK)(ib_cq_handle_t, int *);
300 typedef DAT_RETURN
301 	(*DAPL_CQ_POLL)(ib_cq_handle_t, ibt_wc_t *, uint_t, uint_t *);
302 typedef DAT_RETURN (*DAPL_CQ_POLL_ONE)(ib_cq_handle_t, ibt_wc_t *);
303 typedef DAT_RETURN (*DAPL_CQ_NOTIFY)(ib_cq_handle_t, int, uint32_t);
304 typedef void (*DAPL_SRQ_FLUSH)(ib_qp_handle_t);
305 typedef void (*DAPL_QP_INIT)(ib_qp_handle_t);
306 typedef void (*DAPL_CQ_INIT)(ib_cq_handle_t);
307 typedef void (*DAPL_SRQ_INIT)(ib_srq_handle_t);
308 
309 struct dapl_hca {
310 	DAPL_OS_LOCK lock;
311 	DAPL_LLIST_HEAD ia_list_head;
312 	DAPL_EVD *async_evd;
313 	DAPL_EVD *async_error_evd;
314 	DAT_SOCK_ADDR6 hca_address;	/* local address of HCA */
315 	/* Values specific to IB OS API */
316 	IB_HCA_NAME name;
317 	ib_hca_handle_t ib_hca_handle;
318 	DAPL_ATOMIC handle_ref_count;	/* count of ia_opens on handle */
319 	ib_uint32_t port_num;	/* number of physical port */
320 	ib_uint32_t partition_max;
321 	ib_uint32_t partition_key;
322 	ib_uint32_t tavor_idx;
323 	ib_guid_t node_GUID;
324 	ib_lid_t lid;
325 	int max_inline_send;
326 	/* CQ support thread */
327 	ib_cqd_handle_t ib_cqd_handle;		/* cq domain handle */
328 	ib_cq_handle_t null_ib_cq_handle;	/* CQ handle with 0 entries */
329 	/* Memory Subsystem Support */
330 	DAPL_HASH_TABLE *lmr_hash_table;
331 	/* Limits & useful HCA attributes */
332 	DAT_IA_ATTR ia_attr;
333 	struct dapl_hca *hca_next;
334 	DAPL_POST_SEND post_send;
335 	DAPL_POST_RECV post_recv;
336 	DAPL_POST_SRQ post_srq;
337 	DAPL_CQ_PEEK cq_peek;
338 	DAPL_CQ_POLL cq_poll;
339 	DAPL_CQ_POLL_ONE cq_poll_one;
340 	DAPL_CQ_NOTIFY cq_notify;
341 	DAPL_SRQ_FLUSH srq_flush;
342 	DAPL_QP_INIT qp_init;
343 	DAPL_CQ_INIT cq_init;
344 	DAPL_SRQ_INIT srq_init;
345 	int hermon_resize_cq;
346 };
347 
348 #define	DAPL_SEND(x)	(x->header.owner_ia->hca_ptr->post_send)
349 #define	DAPL_RECV(x)	(x->header.owner_ia->hca_ptr->post_recv)
350 #define	DAPL_SRECV(x)	(x->header.owner_ia->hca_ptr->post_srq)
351 #define	DAPL_PEEK(x)	(x->header.owner_ia->hca_ptr->cq_peek)
352 #define	DAPL_POLL(x)	(x->header.owner_ia->hca_ptr->cq_poll)
353 #define	DAPL_POLL1(x)	(x->header.owner_ia->hca_ptr->cq_poll_one)
354 #define	DAPL_NOTIFY(x)	(x->header.owner_ia->hca_ptr->cq_notify)
355 #define	DAPL_FLUSH(x)	(x->header.owner_ia->hca_ptr->srq_flush)
356 #define	DAPL_INIT_QP(x)	(x->hca_ptr->qp_init)
357 #define	DAPL_INIT_CQ(x)	(x->hca_ptr->cq_init)
358 #define	DAPL_INIT_SRQ(x) (x->hca_ptr->srq_init)
359 
360 extern void dapls_init_funcs_tavor(DAPL_HCA *);
361 extern void dapls_init_funcs_arbel(DAPL_HCA *);
362 extern void dapls_init_funcs_hermon(DAPL_HCA *);
363 
364 /* DAPL Objects always have the following header */
365 struct dapl_header {
366 	DAT_PROVIDER *provider;		/* required by DAT - must be first */
367 	DAPL_MAGIC magic;		/* magic number for verification */
368 	DAT_HANDLE_TYPE handle_type;	/* struct type */
369 	DAPL_IA *owner_ia;		/* ia which owns this struct */
370 	DAPL_LLIST_ENTRY ia_list_entry;	/* link entry on ia struct */
371 	DAT_CONTEXT user_context;	/* user context - opaque to DAPL */
372 	DAPL_OS_LOCK lock;		/* lock - in header for easier macros */
373 };
374 
375 enum DAPL_IA_FLAGS {
376 	DAPL_DISABLE_RO	= 1		/* Disable relaxed ordering */
377 };
378 
379 /* DAPL_IA maps to DAT_IA_HANDLE */
380 struct dapl_ia {
381 	DAPL_HEADER header;
382 	DAPL_HCA *hca_ptr;
383 	DAPL_EVD *async_error_evd;
384 	DAT_BOOLEAN cleanup_async_error_evd;
385 
386 	DAPL_LLIST_ENTRY hca_ia_list_entry;	/* HCAs list of IAs */
387 	DAPL_LLIST_HEAD ep_list_head;		/* EP queue */
388 	DAPL_LLIST_HEAD lmr_list_head;		/* LMR queue */
389 	DAPL_LLIST_HEAD rmr_list_head;		/* RMR queue */
390 	DAPL_LLIST_HEAD pz_list_head;		/* PZ queue */
391 	DAPL_LLIST_HEAD evd_list_head;		/* EVD queue */
392 	DAPL_LLIST_HEAD cno_list_head;		/* CNO queue */
393 	DAPL_LLIST_HEAD psp_list_head;		/* PSP queue */
394 	DAPL_LLIST_HEAD rsp_list_head;		/* RSP queue */
395 	DAPL_LLIST_HEAD srq_list_head;		/* SRQ queue */
396 
397 	enum DAPL_IA_FLAGS dapl_flags;		/* state flags, see above */
398 };
399 
400 /* DAPL_CNO maps to DAT_CNO_HANDLE */
401 struct dapl_cno {
402 	DAPL_HEADER header;
403 
404 	/* A CNO cannot be freed while it is referenced elsewhere.  */
405 	DAPL_ATOMIC cno_ref_count;
406 	DAPL_CNO_STATE cno_state;
407 
408 	DAT_COUNT cno_waiters;
409 	DAPL_EVD *cno_evd_triggered;
410 	DAT_OS_WAIT_PROXY_AGENT cno_wait_agent;
411 
412 	DAPL_OS_WAIT_OBJECT cno_wait_object;
413 	DAPL_LLIST_HEAD evd_list_head;
414 	ib_cno_handle_t ib_cno_handle;
415 };
416 
417 /* DAPL_EVD maps to DAT_EVD_HANDLE */
418 struct dapl_evd {
419 	DAPL_HEADER header;
420 
421 	DAPL_EVD_STATE evd_state;
422 	DAT_EVD_FLAGS evd_flags;
423 	DAT_BOOLEAN evd_enabled;	/* For attached CNO.  */
424 	DAT_BOOLEAN evd_waitable;	/* EVD state.  */
425 
426 	/* Derived from evd_flags; see dapls_evd_internal_create.  */
427 	DAT_BOOLEAN evd_producer_locking_needed;
428 
429 	/* Every EVD has a CQ unless it is a SOFTWARE_EVENT only EVD */
430 	ib_cq_handle_t ib_cq_handle;
431 
432 	/*
433 	 * Mellanox Specific completion handle for
434 	 * registration/de-registration
435 	 */
436 	ib_comp_handle_t ib_comp_handle;
437 
438 	/*
439 	 * An Event Dispatcher cannot be freed while
440 	 * it is referenced elsewhere.
441 	 */
442 	DAPL_ATOMIC evd_ref_count;
443 
444 	/* Set if there has been a catastrophic overflow */
445 	DAT_BOOLEAN catastrophic_overflow;
446 
447 	/* the actual events */
448 	DAT_COUNT qlen;
449 	DAT_EVENT *events;
450 	DAPL_RING_BUFFER free_event_queue;
451 	DAPL_RING_BUFFER pending_event_queue;
452 
453 	/*
454 	 * CQ Completions are not placed into 'deferred_events'
455 	 * rather they are simply left on the Completion Queue
456 	 * and the fact that there was a notification is flagged.
457 	 */
458 	DAT_BOOLEAN cq_notified;
459 	DAPL_OS_TICKS cq_notified_when;
460 
461 	DAT_COUNT cno_active_count;
462 	DAPL_CNO *cno_ptr;
463 
464 	DAPL_OS_WAIT_OBJECT wait_object;
465 	DAT_COUNT threshold;
466 	DAPL_LLIST_ENTRY cno_list_entry;
467 	DAPL_EVD_COMPLETION	completion_type;
468 };
469 
470 /* DAPL_EP maps to DAT_EP_HANDLE */
471 struct dapl_ep {
472 	DAPL_HEADER header;
473 	/* What the DAT Consumer asked for */
474 	DAT_EP_PARAM param;
475 
476 	/* The RC Queue Pair (IBM OS API) */
477 	ib_qp_handle_t qp_handle;
478 	unsigned int qpn;		/* qp number */
479 	ib_qp_state_t qp_state;
480 
481 	/* communications manager handle (IBM OS API) */
482 	ib_cm_handle_t cm_handle;
483 	/*
484 	 * store the remote IA address here, reference from the param
485 	 * struct which only has a pointer, no storage
486 	 */
487 	DAT_SOCK_ADDR6 remote_ia_address;
488 
489 	/* For passive connections we maintain a back pointer to the CR */
490 	void *cr_ptr;
491 
492 	/* private data container */
493 	unsigned char private_data[DAPL_MAX_PRIVATE_DATA_SIZE];
494 
495 	/* DTO data */
496 	DAPL_ATOMIC req_count;
497 	DAPL_ATOMIC recv_count;
498 
499 	DAPL_COOKIE_BUFFER req_buffer;
500 	DAPL_COOKIE_BUFFER recv_buffer;
501 
502 	DAT_BOOLEAN		srq_attached;
503 };
504 
505 /* DAPL_PZ maps to DAT_PZ_HANDLE */
506 struct dapl_pz {
507 	DAPL_HEADER header;
508 	ib_pd_handle_t pd_handle;
509 	DAPL_ATOMIC pz_ref_count;
510 };
511 
512 /* DAPL_LMR maps to DAT_LMR_HANDLE */
513 struct dapl_lmr {
514 	DAPL_HEADER header;
515 	DAT_LMR_PARAM param;
516 	ib_mr_handle_t mr_handle;
517 	DAPL_ATOMIC lmr_ref_count;
518 };
519 
520 /* DAPL_RMR maps to DAT_RMR_HANDLE */
521 struct dapl_rmr {
522 	DAPL_HEADER header;
523 	DAT_RMR_PARAM param;
524 	DAPL_EP *ep;
525 	DAPL_PZ *pz;
526 	DAPL_LMR *lmr;
527 	ib_mw_handle_t mw_handle;
528 };
529 
530 /* SP types, indicating the state and queue */
531 typedef enum dapl_sp_state {
532 	DAPL_SP_STATE_FREE,
533 	DAPL_SP_STATE_PSP_LISTENING,
534 	DAPL_SP_STATE_PSP_PENDING,
535 	DAPL_SP_STATE_RSP_LISTENING,
536 	DAPL_SP_STATE_RSP_PENDING
537 } DAPL_SP_STATE;
538 
539 /* DAPL_SP maps to DAT_PSP_HANDLE and DAT_RSP_HANDLE */
540 struct dapl_sp {
541 	DAPL_HEADER header;
542 	DAPL_SP_STATE state;	/* type and queue of the SP */
543 
544 	/* PSP/RSP PARAM fields */
545 	DAT_IA_HANDLE ia_handle;
546 	DAT_CONN_QUAL conn_qual;
547 	DAT_EVD_HANDLE evd_handle;
548 	DAT_PSP_FLAGS psp_flags;
549 	DAT_EP_HANDLE ep_handle;
550 
551 	/* maintenence fields */
552 	DAT_BOOLEAN listening;		/* PSP is registered & active */
553 	ib_cm_srvc_handle_t cm_srvc_handle;	/* Used by Mellanox CM */
554 	DAPL_LLIST_HEAD cr_list_head;	/* CR pending queue */
555 	DAT_COUNT cr_list_count;	/* count of CRs on queue */
556 };
557 
558 /* DAPL_CR maps to DAT_CR_HANDLE */
559 struct dapl_cr {
560 	DAPL_HEADER header;
561 
562 	/*
563 	 * for convenience the data is kept as a DAT_CR_PARAM.
564 	 * however, the "local_endpoint" field is always NULL
565 	 * so this wastes a pointer. This is probably ok to
566 	 * simplify code, espedially dat_cr_query.
567 	 */
568 	DAT_CR_PARAM param;
569 	/* IB specific fields */
570 	ib_cm_handle_t ib_cm_handle;
571 
572 	DAT_SOCK_ADDR6 remote_ia_address;
573 	/*
574 	 * Assuming that the maximum private data size is small.
575 	 * If it gets large, use of a pointer may be appropriate.
576 	 */
577 	unsigned char private_data[DAPL_MAX_PRIVATE_DATA_SIZE];
578 	/*
579 	 * Need to be able to associate the CR back to the PSP for
580 	 * dapl_cr_reject.
581 	 */
582 	DAPL_SP *sp_ptr;
583 };
584 
585 /* DAPL_SRQ maps to DAT_SRQ_HANDLE */
586 struct dapl_srq {
587 	DAPL_HEADER		header;
588 	DAT_SRQ_PARAM		param;
589 	/* SRQ cannot be freed till EPs attached to srq are freed */
590 	DAPL_ATOMIC		srq_ref_count;
591 	ib_srq_handle_t		srq_handle;
592 	/* DTO data */
593 	DAPL_ATOMIC		recv_count;
594 	DAPL_COOKIE_BUFFER	recv_buffer;
595 };
596 
597 typedef enum dapl_dto_type {
598 	DAPL_DTO_TYPE_SEND,
599 	DAPL_DTO_TYPE_RECV,
600 	DAPL_DTO_TYPE_RDMA_WRITE,
601 	DAPL_DTO_TYPE_RDMA_READ
602 } DAPL_DTO_TYPE;
603 
604 typedef enum dapl_cookie_type {
605 	DAPL_COOKIE_TYPE_NULL,
606 	DAPL_COOKIE_TYPE_DTO,
607 	DAPL_COOKIE_TYPE_RMR
608 } DAPL_COOKIE_TYPE;
609 
610 /* DAPL_DTO_COOKIE used as context for DTO WQEs */
611 struct dapl_dto_cookie {
612 	DAPL_DTO_TYPE type;
613 	DAT_DTO_COOKIE cookie;
614 	DAT_COUNT size;		/* used for SEND and RDMA write */
615 };
616 
617 /* DAPL_RMR_COOKIE used as context for bind WQEs */
618 struct dapl_rmr_cookie {
619 	DAPL_RMR *rmr;
620 	DAT_RMR_COOKIE cookie;
621 };
622 
623 typedef enum dapl_cookie_queue_type {
624 	DAPL_COOKIE_QUEUE_EP,
625 	DAPL_COOKIE_QUEUE_SRQ
626 } DAPL_COOKIE_QUEUE_TYPE;
627 
628 /* DAPL_COOKIE used as context for WQEs */
629 struct dapl_cookie {
630 	DAPL_COOKIE_TYPE type;	/* Must be first, to define struct.  */
631 	DAPL_COOKIE_QUEUE_TYPE	 queue_type;
632 	union {
633 		void		*ptr;
634 		DAPL_EP		*ep;
635 		DAPL_SRQ	*srq;
636 	} queue;
637 	DAT_COUNT index;
638 	union {
639 		DAPL_DTO_COOKIE dto;
640 		DAPL_RMR_COOKIE rmr;
641 	} val;
642 };
643 
644 /*
645  * Generic HCA name field
646  */
647 #define	DAPL_HCA_NAME_MAX_LEN 260
648 typedef char DAPL_HCA_NAME[DAPL_HCA_NAME_MAX_LEN + 1];
649 
650 #if defined(IBHOSTS_NAMING)
651 
652 /*
653  * Simple mapping table to match IP addresses to GIDs. Loaded
654  * by dapl_init.
655  */
656 typedef struct _dapl_gid_map_table {
657 	uint32_t ip_address;
658 	ib_gid_t gid;
659 } DAPL_GID_MAP;
660 
661 #endif /* IBHOSTS_NAMING */
662 
663 /*
664  *
665  * Function Prototypes
666  *
667  */
668 
669 /*
670  * DAT Mandated functions
671  */
672 extern DAT_RETURN
673 dapl_ia_open(
674 	IN const DAT_NAME_PTR,	/* name */
675 	IN DAT_COUNT,		/* asynch_evd_qlen */
676 	INOUT DAT_EVD_HANDLE *,	/* asynch_evd_handle */
677 	OUT DAT_IA_HANDLE *,	/* ia_handle */
678 	IN	boolean_t);	/* ro_aware_client */
679 
680 extern DAT_RETURN
681 dapl_ia_close(
682 	IN DAT_IA_HANDLE,	/* ia_handle */
683 	IN DAT_CLOSE_FLAGS);	/* ia_flags */
684 
685 
686 extern DAT_RETURN
687 dapl_ia_query(
688 	IN DAT_IA_HANDLE,		/* ia handle */
689 	OUT DAT_EVD_HANDLE *,		/* async_evd_handle */
690 	IN DAT_IA_ATTR_MASK,		/* ia_params_mask */
691 	OUT DAT_IA_ATTR *,		/* ia_params */
692 	IN DAT_PROVIDER_ATTR_MASK,	/* provider_params_mask */
693 	OUT DAT_PROVIDER_ATTR *);	/* provider_params */
694 
695 
696 /* helper functions */
697 extern DAT_RETURN
698 dapl_set_consumer_context(
699 	IN DAT_HANDLE,		/* dat handle */
700 	IN DAT_CONTEXT);	/* context */
701 
702 extern DAT_RETURN
703 dapl_get_consumer_context(
704 	IN DAT_HANDLE,		/* dat handle */
705 	OUT DAT_CONTEXT *);	/* context */
706 
707 extern DAT_RETURN
708 dapl_get_handle_type(
709 	IN DAT_HANDLE,
710 	OUT DAT_HANDLE_TYPE *);
711 
712 
713 /* CNO functions */
714 extern DAT_RETURN
715 dapl_cno_create(
716 	IN DAT_IA_HANDLE,		/* ia_handle */
717 	IN DAT_OS_WAIT_PROXY_AGENT,	/* agent */
718 	OUT DAT_CNO_HANDLE *);		/* cno_handle */
719 
720 extern DAT_RETURN
721 dapl_cno_modify_agent(
722 	IN DAT_CNO_HANDLE,		/* cno_handle */
723 	IN DAT_OS_WAIT_PROXY_AGENT);	/* agent */
724 
725 extern DAT_RETURN
726 dapl_cno_query(
727 	IN DAT_CNO_HANDLE,	/* cno_handle */
728 	IN DAT_CNO_PARAM_MASK,	/* cno_param_mask */
729 	OUT DAT_CNO_PARAM *);	/* cno_param */
730 
731 extern DAT_RETURN
732 dapl_cno_free(IN DAT_CNO_HANDLE);	/* cno_handle */
733 
734 extern DAT_RETURN
735 dapl_cno_wait(
736 	IN DAT_CNO_HANDLE,	/* cno_handle */
737 	IN DAT_TIMEOUT,		/* timeout */
738 	OUT DAT_EVD_HANDLE *);	/* evd_handle */
739 
740 
741 /* CR Functions */
742 extern DAT_RETURN
743 dapl_cr_query(
744 	IN DAT_CR_HANDLE,	/* cr_handle */
745 	IN DAT_CR_PARAM_MASK,	/* cr_args_mask */
746 	OUT DAT_CR_PARAM *);	/* cwr_args */
747 
748 extern DAT_RETURN
749 dapl_cr_accept(
750 	IN DAT_CR_HANDLE,	/* cr_handle */
751 	IN DAT_EP_HANDLE,	/* ep_handle */
752 	IN DAT_COUNT,		/* private_data_size */
753 	IN const DAT_PVOID);	/* private_data */
754 
755 extern DAT_RETURN
756 dapl_cr_reject(IN DAT_CR_HANDLE);
757 
758 extern DAT_RETURN
759 dapl_cr_handoff(
760 	IN DAT_CR_HANDLE,	/* cr_handle */
761 	IN DAT_CONN_QUAL);	/* handoff */
762 
763 /* EVD Functions */
764 extern DAT_RETURN
765 dapl_evd_create(
766 	IN DAT_IA_HANDLE,	/* ia_handle */
767 	IN DAT_COUNT,		/* evd_min_qlen */
768 	IN DAT_CNO_HANDLE,	/* cno_handle */
769 	IN DAT_EVD_FLAGS,	/* evd_flags */
770 	OUT DAT_EVD_HANDLE *);	/* evd_handle */
771 
772 extern DAT_RETURN
773 dapl_evd_query(
774 	IN DAT_EVD_HANDLE,	/* evd_handle */
775 	IN DAT_EVD_PARAM_MASK,	/* evd_args_mask */
776 	OUT DAT_EVD_PARAM *);	/* evd_args */
777 
778 #if 0				/* kdapl */
779 extern DAT_RETURN
780 dapl_evd_modify_upcall(
781 	IN DAT_EVD_HANDLE,	/* evd_handle */
782 	IN DAT_UPCALL_POLICY,	/* upcall_policy */
783 	IN DAT_UPCALL_OBJECT);	/* upcall */
784 #else
785 
786 extern DAT_RETURN
787 dapl_evd_modify_cno(
788 	IN DAT_EVD_HANDLE,	/* evd_handle */
789 	IN DAT_CNO_HANDLE);	/* cno_handle */
790 
791 extern DAT_RETURN
792 dapl_evd_enable(IN DAT_EVD_HANDLE);	/* evd_handle */
793 
794 extern DAT_RETURN
795 dapl_evd_disable(IN DAT_EVD_HANDLE);	/* evd_handle */
796 
797 extern DAT_RETURN
798 dapl_evd_wait(
799 	IN DAT_EVD_HANDLE,	/* evd_handle */
800 	IN DAT_TIMEOUT,		/* timeout */
801 	IN DAT_COUNT,		/* threshold */
802 	OUT DAT_EVENT *,	/* event */
803 	OUT DAT_COUNT *);	/* nmore */
804 #endif
805 
806 extern DAT_RETURN
807 dapl_evd_resize(
808 	IN DAT_EVD_HANDLE,	/* evd_handle */
809 	IN DAT_COUNT);		/* evd_qlen */
810 
811 extern DAT_RETURN
812 dapl_evd_wait(
813 	IN DAT_EVD_HANDLE,	/* evd_handle */
814 	IN DAT_TIMEOUT,		/* timeout */
815 	IN DAT_COUNT,		/* threshold */
816 	OUT DAT_EVENT *,	/* event */
817 	OUT DAT_COUNT *);	/* nmore */
818 
819 extern DAT_RETURN
820 dapl_evd_post_se(
821 	DAT_EVD_HANDLE,		/* evd_handle */
822 	const DAT_EVENT *);	/* event */
823 
824 extern DAT_RETURN
825 dapl_evd_dequeue(
826 	IN DAT_EVD_HANDLE,	/* evd_handle */
827 	OUT DAT_EVENT *);	/* event */
828 
829 extern DAT_RETURN
830 dapl_evd_free(IN DAT_EVD_HANDLE);
831 
832 extern DAT_RETURN
833 dapl_evd_set_unwaitable(IN DAT_EVD_HANDLE evd_handle);
834 
835 extern DAT_RETURN
836 dapl_evd_clear_unwaitable(IN DAT_EVD_HANDLE evd_handle);
837 
838 
839 /* EP functions */
840 extern DAT_RETURN
841 dapl_ep_create(
842 	IN DAT_IA_HANDLE,	/* ia_handle */
843 	IN DAT_PZ_HANDLE,	/* pz_handle */
844 	IN DAT_EVD_HANDLE,	/* in_dto_completion_evd_handle */
845 	IN DAT_EVD_HANDLE,	/* out_dto_completion_evd_handle */
846 	IN DAT_EVD_HANDLE,	/* connect_evd_handle */
847 	IN const DAT_EP_ATTR *,	/* ep_parameters */
848 	OUT DAT_EP_HANDLE *);	/* ep_handle */
849 
850 extern DAT_RETURN
851 dapl_ep_query(
852 	IN DAT_EP_HANDLE,	/* ep_handle */
853 	IN DAT_EP_PARAM_MASK,	/* ep_args_mask */
854 	OUT DAT_EP_PARAM *);	/* ep_args */
855 
856 extern DAT_RETURN
857 dapl_ep_modify(
858 	IN DAT_EP_HANDLE,		/* ep_handle */
859 	IN DAT_EP_PARAM_MASK,		/* ep_args_mask */
860 	IN const DAT_EP_PARAM *);	/* ep_args */
861 
862 extern DAT_RETURN
863 dapl_ep_connect(
864 	IN DAT_EP_HANDLE,	/* ep_handle */
865 	IN DAT_IA_ADDRESS_PTR,	/* remote_ia_address */
866 	IN DAT_CONN_QUAL,	/* remote_conn_qual */
867 	IN DAT_TIMEOUT,		/* timeout */
868 	IN DAT_COUNT,		/* private_data_size */
869 	IN const DAT_PVOID,	/* private_data  */
870 	IN DAT_QOS,		/* quality_of_service */
871 	IN DAT_CONNECT_FLAGS);	/* connect_flags */
872 
873 extern DAT_RETURN
874 dapl_ep_dup_connect(
875 	IN DAT_EP_HANDLE,	/* ep_handle */
876 	IN DAT_EP_HANDLE,	/* ep_dup_handle */
877 	IN DAT_TIMEOUT,		/* timeout */
878 	IN DAT_COUNT,		/* private_data_size */
879 	IN const DAT_PVOID,	/* private_data */
880 	IN DAT_QOS);		/* quality_of_service */
881 
882 extern DAT_RETURN
883 dapl_ep_disconnect(
884 	IN DAT_EP_HANDLE,	/* ep_handle */
885 	IN DAT_CLOSE_FLAGS);	/* completion_flags */
886 
887 extern DAT_RETURN
888 dapl_ep_post_send(
889 	IN DAT_EP_HANDLE,		/* ep_handle */
890 	IN DAT_COUNT,			/* num_segments */
891 	IN DAT_LMR_TRIPLET *,		/* local_iov */
892 	IN DAT_DTO_COOKIE,		/* user_cookie */
893 	IN DAT_COMPLETION_FLAGS);	/* completion_flags */
894 
895 extern DAT_RETURN
896 dapl_ep_post_recv(
897 	IN DAT_EP_HANDLE,		/* ep_handle */
898 	IN DAT_COUNT,			/* num_segments */
899 	IN DAT_LMR_TRIPLET *,		/* local_iov */
900 	IN DAT_DTO_COOKIE,		/* user_cookie */
901 	IN DAT_COMPLETION_FLAGS);	/* completion_flags */
902 
903 extern DAT_RETURN
904 dapl_ep_post_rdma_read(
905 	IN DAT_EP_HANDLE,		/* ep_handle */
906 	IN DAT_COUNT,			/* num_segments */
907 	IN DAT_LMR_TRIPLET *,		/* local_iov */
908 	IN DAT_DTO_COOKIE,		/* user_cookie */
909 	IN const DAT_RMR_TRIPLET *,	/* remote_iov */
910 	IN DAT_COMPLETION_FLAGS);	/* completion_flags */
911 
912 extern DAT_RETURN
913 dapl_ep_post_rdma_write(
914 	IN DAT_EP_HANDLE,		/* ep_handle */
915 	IN DAT_COUNT,			/* num_segments */
916 	IN DAT_LMR_TRIPLET *,		/* local_iov */
917 	IN DAT_DTO_COOKIE,		/* user_cookie */
918 	IN const DAT_RMR_TRIPLET *,	/* remote_iov */
919 	IN DAT_COMPLETION_FLAGS);	/* completion_flags */
920 
921 extern DAT_RETURN
922 dapl_ep_get_status(
923 	IN DAT_EP_HANDLE,	/* ep_handle */
924 	OUT DAT_EP_STATE *,	/* ep_state */
925 	OUT DAT_BOOLEAN *,	/* in_dto_idle */
926 	OUT DAT_BOOLEAN *);	/* out_dto_idle */
927 
928 extern DAT_RETURN
929 dapl_ep_free(IN DAT_EP_HANDLE);		/* ep_handle */
930 
931 extern DAT_RETURN
932 dapl_ep_reset(IN DAT_EP_HANDLE);	/* ep_handle */
933 
934 
935 /* LMR functions */
936 extern DAT_RETURN
937 dapl_lmr_create(
938 	IN DAT_IA_HANDLE,		/* ia_handle */
939 	IN DAT_MEM_TYPE,		/* mem_type */
940 	IN DAT_REGION_DESCRIPTION,	/* region_description */
941 	IN DAT_VLEN,			/* length */
942 	IN DAT_PZ_HANDLE,		/* pz_handle */
943 	IN DAT_MEM_PRIV_FLAGS,		/* privileges */
944 	OUT DAT_LMR_HANDLE *,		/* lmr_handle */
945 	OUT DAT_LMR_CONTEXT *,		/* lmr_context */
946 	OUT DAT_RMR_CONTEXT *,		/* rmr_context */
947 	OUT DAT_VLEN *,			/* registered_length */
948 	OUT DAT_VADDR *);		/* registered_address */
949 
950 extern DAT_RETURN
951 dapl_lmr_query(
952 	IN DAT_LMR_HANDLE,
953 	IN DAT_LMR_PARAM_MASK,
954 	OUT DAT_LMR_PARAM *);
955 
956 extern DAT_RETURN
957 dapl_lmr_free(IN DAT_LMR_HANDLE);
958 
959 
960 /* RMR Functions */
961 extern DAT_RETURN
962 dapl_rmr_create(
963 	IN DAT_PZ_HANDLE,	/* pz_handle */
964 	OUT DAT_RMR_HANDLE *);	/* rmr_handle */
965 
966 extern DAT_RETURN
967 dapl_rmr_query(
968 	IN DAT_RMR_HANDLE,	/* rmr_handle */
969 	IN DAT_RMR_PARAM_MASK,	/* rmr_args_mask */
970 	OUT DAT_RMR_PARAM *);	/* rmr_args */
971 
972 extern DAT_RETURN
973 dapl_rmr_bind(
974 	IN DAT_RMR_HANDLE,		/* rmr_handle */
975 	IN const DAT_LMR_TRIPLET *,	/* lmr_triplet */
976 	IN DAT_MEM_PRIV_FLAGS,		/* mem_priv */
977 	IN DAT_EP_HANDLE,		/* ep_handle */
978 	IN DAT_RMR_COOKIE,		/* user_cookie */
979 	IN DAT_COMPLETION_FLAGS,	/* completion_flags */
980 	INOUT DAT_RMR_CONTEXT *);	/* context */
981 
982 extern DAT_RETURN
983 dapl_rmr_free(IN DAT_RMR_HANDLE);
984 
985 
986 /* PSP Functions */
987 extern DAT_RETURN
988 dapl_psp_create(
989 	IN DAT_IA_HANDLE,	/* ia_handle */
990 	IN DAT_CONN_QUAL,	/* conn_qual */
991 	IN DAT_EVD_HANDLE,	/* evd_handle */
992 	IN DAT_PSP_FLAGS,	/* psp_flags */
993 	OUT DAT_PSP_HANDLE *);	/* psp_handle */
994 
995 extern DAT_RETURN
996 dapl_psp_create_any(
997 	IN DAT_IA_HANDLE,	/* ia_handle */
998 	OUT DAT_CONN_QUAL *,	/* conn_qual */
999 	IN DAT_EVD_HANDLE,	/* evd_handle */
1000 	IN DAT_PSP_FLAGS,	/* psp_flags */
1001 	OUT DAT_PSP_HANDLE *);	/* psp_handle */
1002 
1003 extern DAT_RETURN
1004 dapl_psp_query(
1005 	IN DAT_PSP_HANDLE,
1006 	IN DAT_PSP_PARAM_MASK,
1007 	OUT DAT_PSP_PARAM *);
1008 
1009 extern DAT_RETURN
1010 dapl_psp_free(IN DAT_PSP_HANDLE);	/* psp_handle */
1011 
1012 
1013 /* RSP Functions */
1014 extern DAT_RETURN
1015 dapl_rsp_create(
1016 	IN DAT_IA_HANDLE,	/* ia_handle */
1017 	IN DAT_CONN_QUAL,	/* conn_qual */
1018 	IN DAT_EP_HANDLE,	/* ep_handle */
1019 	IN DAT_EVD_HANDLE,	/* evd_handle */
1020 	OUT DAT_RSP_HANDLE *);	/* rsp_handle */
1021 
1022 extern DAT_RETURN
1023 dapl_rsp_query(
1024 	IN DAT_RSP_HANDLE,
1025 	IN DAT_RSP_PARAM_MASK,
1026 	OUT DAT_RSP_PARAM *);
1027 
1028 extern DAT_RETURN
1029 dapl_rsp_free(IN DAT_RSP_HANDLE);	/* rsp_handle */
1030 
1031 
1032 /* PZ Functions */
1033 extern DAT_RETURN
1034 dapl_pz_create(
1035 	IN DAT_IA_HANDLE,	/* ia_handle */
1036 	OUT DAT_PZ_HANDLE *);	/* pz_handle */
1037 
1038 extern DAT_RETURN
1039 dapl_pz_query(
1040 	IN DAT_PZ_HANDLE,	/* pz_handle */
1041 	IN DAT_PZ_PARAM_MASK,	/* pz_args_mask */
1042 	OUT DAT_PZ_PARAM *);	/* pz_args */
1043 
1044 extern DAT_RETURN
1045 dapl_pz_free(IN DAT_PZ_HANDLE);	/* pz_handle */
1046 
1047 /* Non-coherent memory fucntions */
1048 
1049 extern DAT_RETURN dapl_lmr_sync_rdma_read(
1050 	IN	DAT_IA_HANDLE,		/* ia_handle		*/
1051 	IN	const DAT_LMR_TRIPLET *, /* local_segments	*/
1052 	IN	DAT_VLEN);		/* num_segments		*/
1053 
1054 extern DAT_RETURN dapl_lmr_sync_rdma_write(
1055 	IN	DAT_IA_HANDLE,		/* ia_handle		*/
1056 	IN	const DAT_LMR_TRIPLET *, /* local_segments	*/
1057 	IN	DAT_VLEN);		/* num_segments		*/
1058 
1059 /*
1060  * SRQ functions
1061  */
1062 extern DAT_RETURN dapl_ep_create_with_srq(
1063 	IN	DAT_IA_HANDLE,		/* ia_handle		*/
1064 	IN	DAT_PZ_HANDLE,		/* pz_handle		*/
1065 	IN	DAT_EVD_HANDLE,		/* recv_evd_handle	*/
1066 	IN	DAT_EVD_HANDLE,		/* request_evd_handle	*/
1067 	IN	DAT_EVD_HANDLE,		/* connect_evd_handle	*/
1068 	IN	DAT_SRQ_HANDLE,		/* srq_handle		*/
1069 	IN	const DAT_EP_ATTR *,	/* ep_attributes	*/
1070 	OUT	DAT_EP_HANDLE *);	/* ep_handle		*/
1071 
1072 extern DAT_RETURN dapl_ep_recv_query(
1073 	IN	DAT_EP_HANDLE,		/* ep_handle		*/
1074 	OUT	DAT_COUNT *,		/* nbufs_allocated	*/
1075 	OUT	DAT_COUNT *);		/* bufs_alloc_span	*/
1076 
1077 extern DAT_RETURN dapl_ep_set_watermark(
1078 	IN	DAT_EP_HANDLE,		/* ep_handle		*/
1079 	IN	DAT_COUNT,		/* soft_high_watermark	*/
1080 	IN	DAT_COUNT);		/* hard_high_watermark	*/
1081 
1082 extern DAT_RETURN dapl_srq_create(
1083 	IN	DAT_IA_HANDLE,		/* ia_handle		*/
1084 	IN	DAT_PZ_HANDLE,		/* pz_handle		*/
1085 	IN	DAT_SRQ_ATTR *,		/* srq_attr		*/
1086 	OUT	DAT_SRQ_HANDLE *);	/* srq_handle		*/
1087 
1088 extern DAT_RETURN dapl_srq_free(
1089 	IN	DAT_SRQ_HANDLE);	/* srq_handle		*/
1090 
1091 extern DAT_RETURN dapl_srq_post_recv(
1092 	IN	DAT_SRQ_HANDLE,		/* srq_handle		*/
1093 	IN	DAT_COUNT,		/* num_segments		*/
1094 	IN	DAT_LMR_TRIPLET *,	/* local_iov		*/
1095 	IN	DAT_DTO_COOKIE);	/* user_cookie		*/
1096 
1097 extern DAT_RETURN dapl_srq_query(
1098 	IN	DAT_SRQ_HANDLE,		/* srq_handle		*/
1099 	IN	DAT_SRQ_PARAM_MASK,	/* srq_param_mask	*/
1100 	OUT	DAT_SRQ_PARAM *);	/* srq_param		*/
1101 
1102 extern DAT_RETURN dapl_srq_resize(
1103 	IN	DAT_SRQ_HANDLE,		/* srq_handle		*/
1104 	IN	DAT_COUNT);		/* srq_max_recv_dto	*/
1105 
1106 extern DAT_RETURN dapl_srq_set_lw(
1107 	IN	DAT_SRQ_HANDLE,		/* srq_handle		*/
1108 	IN	DAT_COUNT);		/* low_watermark	*/
1109 
1110 
1111 /*
1112  * DAPL internal utility function prototpyes
1113  */
1114 extern void
1115 dapl_llist_init_head(DAPL_LLIST_HEAD *head);
1116 
1117 extern void
1118 dapl_llist_init_entry(DAPL_LLIST_ENTRY *entry);
1119 
1120 extern DAT_BOOLEAN
1121 dapl_llist_is_empty(DAPL_LLIST_HEAD *head);
1122 
1123 extern void
1124 dapl_llist_add_head(
1125 	DAPL_LLIST_HEAD *head,
1126 	DAPL_LLIST_ENTRY *entry,
1127 	void *data);
1128 
1129 extern void
1130 dapl_llist_add_tail(
1131 	DAPL_LLIST_HEAD *head,
1132 	DAPL_LLIST_ENTRY *entry,
1133 	void *data);
1134 
1135 extern void
1136 dapl_llist_add_entry(
1137 	DAPL_LLIST_HEAD *head,
1138 	DAPL_LLIST_ENTRY *entry,
1139 	DAPL_LLIST_ENTRY *new_entry,
1140 	void *data);
1141 
1142 extern void *
1143 dapl_llist_remove_head(DAPL_LLIST_HEAD *head);
1144 
1145 extern void *
1146 dapl_llist_remove_tail(DAPL_LLIST_HEAD *head);
1147 
1148 extern void *
1149 dapl_llist_remove_entry(DAPL_LLIST_HEAD *head,
1150 	DAPL_LLIST_ENTRY *entry);
1151 
1152 extern void *
1153 dapl_llist_peek_head(DAPL_LLIST_HEAD *head);
1154 
1155 extern void *
1156 dapl_llist_next_entry(
1157 	IN DAPL_LLIST_HEAD *head,
1158 	IN DAPL_LLIST_ENTRY *cur_ent);
1159 
1160 extern void
1161 dapl_llist_debug_print_list(DAPL_LLIST_HEAD *head);
1162 
1163 #ifdef __cplusplus
1164 }
1165 #endif
1166 
1167 #endif /* _DAPL_H_ */
1168