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#include "dapl_mr_util.h"
32
33/*
34 *
35 * MODULE: dapl_mr_util.c
36 *
37 * PURPOSE: Common Memory Management functions and data structures
38 *
39 */
40
41/*
42 *
43 * Function Definitions
44 *
45 */
46
47/*
48 * dapl_mr_get_address
49 *
50 * Returns the memory address associated with the given memory descriptor
51 *
52 */
53DAT_VADDR
54dapl_mr_get_address(DAT_REGION_DESCRIPTION desc, DAT_MEM_TYPE type)
55{
56	switch (type) {
57	case DAT_MEM_TYPE_VIRTUAL: {
58		return ((DAT_VADDR)(uintptr_t)desc.for_va);
59	}
60	case DAT_MEM_TYPE_LMR: {
61		DAPL_LMR 	*lmr;
62
63		lmr = (DAPL_LMR *)desc.for_lmr_handle;
64
65		/* Since this function is recoursive we cannot inline it */
66		return (dapl_mr_get_address(lmr->param.region_desc,
67		    lmr->param.mem_type));
68	}
69	case DAT_MEM_TYPE_SHARED_VIRTUAL: {
70		return ((DAT_VADDR)(uintptr_t)
71		    desc.for_shared_memory.virtual_address);
72	}
73	default:
74		dapl_os_assert(0);
75		return (0);
76	}
77}
78
79/*
80 * dapl_mr_bounds_check
81 *
82 * Returns true if region B is contained within region A
83 * and false otherwise
84 *
85 */
86DAT_BOOLEAN
87dapl_mr_bounds_check(DAT_VADDR addr_a, DAT_VLEN length_a,
88	DAT_VADDR addr_b, DAT_VLEN length_b)
89{
90	if ((addr_a <= addr_b) &&
91	    (addr_b + length_b) <= (addr_a + length_a)) {
92		return (DAT_TRUE);
93	} else {
94		return (DAT_FALSE);
95	}
96}
97