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 */
53 DAT_VADDR
dapl_mr_get_address(DAT_REGION_DESCRIPTION desc,DAT_MEM_TYPE type)54 dapl_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 */
86 DAT_BOOLEAN
dapl_mr_bounds_check(DAT_VADDR addr_a,DAT_VLEN length_a,DAT_VADDR addr_b,DAT_VLEN length_b)87 dapl_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