dapl_srq_util.c revision 9517:b4839b0aa7a4 
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 2007 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*
28 *
29 * MODULE: dapl_srq_util.c
30 *
31 * PURPOSE: Shared Receive Queue utility functions.
32 *
33 */
34
35#include "dapl.h"
36#include "dapl_cookie.h"
37#include "dapl_srq_util.h"
38
39/*
40 * dapl_srq_alloc
41 *
42 * Allocate SRQ structure.
43 *
44 * Input:
45 * 	IA, srq_attr
46 *
47 * Output:
48 * 	none
49 *
50 * Returns:
51 * 	Pointer to alloted SRQ
52 *
53 */
54DAPL_SRQ *
55dapl_srq_alloc(IN DAPL_IA *ia_ptr, IN const DAT_SRQ_ATTR *srq_attr)
56{
57	DAPL_SRQ *srq_ptr;
58	DAT_RETURN retval;
59
60	/* Allocate SRQ */
61	srq_ptr = (DAPL_SRQ *)dapl_os_alloc(sizeof (DAPL_SRQ));
62	if (srq_ptr == NULL) {
63		goto bail;
64	}
65
66	/* zero the structure */
67	(void) dapl_os_memzero(srq_ptr, sizeof (DAPL_SRQ));
68
69	/*
70	 * initialize the header
71	 */
72	srq_ptr->header.provider	= ia_ptr->header.provider;
73	srq_ptr->header.magic		= DAPL_MAGIC_SRQ;
74	srq_ptr->header.handle_type	= DAT_HANDLE_TYPE_SRQ;
75	srq_ptr->header.owner_ia	= ia_ptr;
76	srq_ptr->header.user_context.as_64	= 0;
77	dapl_llist_init_entry(&srq_ptr->header.ia_list_entry);
78	dapl_os_lock_init(&srq_ptr->header.lock);
79
80	/* The SRQ ptr is stored in the cookies */
81	retval = dapls_cb_create(&srq_ptr->recv_buffer, srq_ptr,
82	    DAPL_COOKIE_QUEUE_SRQ, srq_attr->max_recv_dtos);
83	if (retval != DAT_SUCCESS) {
84		dapl_dbg_log(DAPL_DBG_TYPE_ERR, "dapls_srq_alloc cb_create "
85		    "failed %d\n", retval);
86		dapl_srq_dealloc(srq_ptr);
87		srq_ptr = NULL;
88		goto bail;
89	}
90
91bail:
92	return (srq_ptr);
93}
94
95/*
96 * dapl_srq_dealloc
97 *
98 * Free the passed in SRQ structure.
99 *
100 * Input:
101 * 	entry point pointer
102 *
103 * Output:
104 * 	none
105 *
106 * Returns:
107 * 	none
108 *
109 */
110void
111dapl_srq_dealloc(IN DAPL_SRQ	*srq_ptr)
112{
113	dapl_os_assert(srq_ptr->header.magic == DAPL_MAGIC_SRQ);
114
115	/* reset magic to prevent reuse */
116	srq_ptr->header.magic = DAPL_MAGIC_INVALID;
117
118	dapls_cb_free(&srq_ptr->recv_buffer);
119
120	dapl_os_lock_destroy(&srq_ptr->header.lock);
121	dapl_os_free(srq_ptr, sizeof (DAPL_SRQ));
122}
123