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 2009 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27
28 #include <sun_sas.h>
29
30 mutex_t all_hbas_lock = DEFAULTMUTEX;
31 mutex_t open_handles_lock = DEFAULTMUTEX;
32 HBA_UINT16 open_handle_index;
33 HBA_UINT32 hba_count;
34
35 /*
36 * Loads the HBA Library. Must be called before calling any HBA library
37 * functions
38 *
39 * Return values:
40 * HBA_STATUS_OK library properly loaded
41 * HBA_STATUS_ERROR library loaded incorrectly
42 */
43 int loadCount = 0;
Sun_sasLoadLibrary()44 HBA_STATUS Sun_sasLoadLibrary() {
45 const char ROUTINE[] = "Sun_sasLoadLibrary";
46 di_node_t root;
47 boolean_t atLeastOneHBA = B_FALSE;
48 boolean_t atLeastOneFailure = B_FALSE;
49 hrtime_t start = 0;
50 hrtime_t end = 0;
51 double duration = 0;
52
53 /* Make sure that library has not been already loaded */
54 if (loadCount++ > 0) {
55 log(LOG_DEBUG, ROUTINE, "Library already loaded %d time."
56 " Ignoring.", loadCount);
57 return (HBA_STATUS_ERROR);
58 }
59 hba_count = 0;
60 open_handle_index = 1;
61
62 /* grab write lock */
63 lock(&all_hbas_lock);
64
65 start = gethrtime();
66 if ((root = di_init("/", DINFOCACHE)) == DI_NODE_NIL) {
67 log(LOG_DEBUG, ROUTINE,
68 "Unable to load device tree: \"%s\"",
69 strerror(errno));
70 unlock(&all_hbas_lock);
71 return (HBA_STATUS_ERROR);
72 }
73 end = gethrtime();
74 duration = end - start;
75 duration /= HR_SECOND;
76 log(LOG_DEBUG, ROUTINE, "Loading device tree init took "
77 "%.6f seconds", duration);
78
79 /* At load time, we only gather libdevinfo information */
80 if (devtree_get_all_hbas(root) == HBA_STATUS_OK) {
81 atLeastOneHBA = B_TRUE;
82 } else {
83 atLeastOneFailure = B_TRUE;
84 }
85
86 di_fini(root);
87
88 unlock(&all_hbas_lock);
89
90 /* Now determine what status code to return */
91 if (atLeastOneHBA) {
92 /* We've got at least one HBA and possibly some failures */
93 return (HBA_STATUS_OK);
94 }
95 if (atLeastOneFailure) {
96 /* We have no HBAs but have failures */
97 return (HBA_STATUS_ERROR);
98 }
99
100 /* We have no HBAs and no failures */
101 return (HBA_STATUS_OK);
102 }
103