xref: /illumos-gate/usr/src/lib/udapl/udapl_tavor/common/dapl_rmr_free.c (revision fb4cdc19f4c1650a26fa4b7f4faf5a036225c7d4)
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 2003 Sun Microsystems, Inc.  All rights reserved.
28  * Use is subject to license terms.
29  */
30 
31 /*
32  *
33  * MODULE: dapl_rmr_free.c
34  *
35  * PURPOSE: Memory management
36  * Description: Interfaces in this file are completely described in
37  *		the DAPL 1.1 API, Chapter 6, section 6
38  *
39  */
40 
41 #include "dapl_rmr_util.h"
42 #include "dapl_adapter_util.h"
43 #include "dapl_ia_util.h"
44 
45 /*
46  * dapl_rmr_free
47  *
48  * DAPL Requirements Version xxx, 6.6.4.2
49  *
50  * Destroy an instance of the Remote Memory Region
51  *
52  * Input:
53  * 	rmr_handle
54  *
55  * Output:
56  * 	none
57  *
58  * Returns:
59  * 	DAT_SUCCESS
60  * 	DAT_INVALID_PARAMETER
61  */
62 DAT_RETURN
dapl_rmr_free(IN DAT_RMR_HANDLE rmr_handle)63 dapl_rmr_free(IN DAT_RMR_HANDLE rmr_handle)
64 {
65 	DAPL_RMR *rmr;
66 	DAT_RETURN dat_status;
67 
68 	dat_status = DAT_SUCCESS;
69 
70 	if (DAPL_BAD_HANDLE(rmr_handle, DAPL_MAGIC_RMR)) {
71 		dat_status = DAT_ERROR(DAT_INVALID_HANDLE,
72 		    DAT_INVALID_HANDLE_RMR);
73 		goto bail;
74 	}
75 
76 	rmr = (DAPL_RMR *)rmr_handle;
77 
78 	/*
79 	 * If the user did not perform an unbind op, release
80 	 * counts here.
81 	 */
82 	if (rmr->param.lmr_triplet.virtual_address != 0) {
83 		dapl_os_atomic_dec(&rmr->lmr->lmr_ref_count);
84 		rmr->param.lmr_triplet.virtual_address = 0;
85 	}
86 
87 	dat_status = dapls_ib_mw_free(rmr);
88 
89 	if (dat_status != DAT_SUCCESS) {
90 		goto bail;
91 	}
92 
93 	dapl_os_atomic_dec(&rmr->pz->pz_ref_count);
94 
95 	dapl_rmr_dealloc(rmr);
96 
97 bail:
98 	return (dat_status);
99 }
100