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 * Copyright 2019 Joyent, Inc.
28 */
29
30#include    <sun_sas.h>
31
32/*
33 * Discover an HBA node with  matching path.
34 * The di_node_t argument should be the root of the device tree.
35 * This routine assumes the locks have been taken
36 */
37static int
38find_matching_hba(di_node_t node, void *arg)
39{
40	int *propData, rval;
41	walkarg_t *wa = (walkarg_t *)arg;
42	char	*devpath, fulldevpath[MAXPATHLEN];
43
44	/* Skip stub(instance -1) nodes */
45	if (IS_STUB_NODE(node)) {
46		return (DI_WALK_CONTINUE);
47	}
48
49	rval = di_prop_lookup_ints(DDI_DEV_T_ANY, node,
50	    "sm-hba-supported", &propData);
51	if (rval < 0) {
52		return (DI_WALK_CONTINUE);
53	} else {
54		if ((devpath = di_devfs_path(node)) == NULL) {
55			/* still continue to see if there is matching one. */
56			return (DI_WALK_CONTINUE);
57		}
58		(void) snprintf(fulldevpath, MAXPATHLEN, "%s%s", DEVICES_DIR,
59		    devpath);
60
61		if ((strstr(fulldevpath, wa->devpath)) != NULL) {
62			*wa->flag = B_TRUE;
63			/* Found a node. No need to walk any more. */
64			di_devfs_path_free(devpath);
65			return (DI_WALK_TERMINATE);
66		}
67		di_devfs_path_free(devpath);
68	}
69
70	return (DI_WALK_CONTINUE);
71}
72
73/*
74 * Refreshes information about an HBA
75 *
76 * Note: This routine holds the locks in write mode
77 *       during most of the processing, and as such, will cause
78 *	 all other threads to block on entry into the library
79 *	 until the refresh is complete.  An optimization would be
80 *       to put fine-grain locking in for the open_handle structures.
81 */
82void
83Sun_sasRefreshAdapterConfiguration()
84{
85	const char		    ROUTINE[] =
86	    "Sun_sasRefreshAdapterConfiguration";
87	struct sun_sas_hba	    *hba_ptr;
88	di_node_t		    root;
89	hrtime_t		    start;
90	hrtime_t		    end;
91	double			    duration;
92	walkarg_t		    wa;
93
94	/*
95	 * We're going to be tweaking a lot of global lists, so write
96	 * lock them.
97	 */
98	lock(&all_hbas_lock);
99	lock(&open_handles_lock);
100
101	start = gethrtime();
102	/* Grab device tree */
103	if ((root = di_init("/", DINFOCACHE)) == DI_NODE_NIL) {
104		log(LOG_DEBUG, ROUTINE,
105		    "Unable to load device tree for reason \"%s\"",
106		    strerror(errno));
107		unlock(&open_handles_lock);
108		unlock(&all_hbas_lock);
109		return;
110	}
111
112	end = gethrtime();
113	duration = end - start;
114	duration /= HR_SECOND;
115	log(LOG_DEBUG, ROUTINE, "Device tree init took "
116	    "%.6f seconds", duration);
117
118	for (hba_ptr = global_hba_head; hba_ptr != NULL;
119	    hba_ptr = hba_ptr->next) {
120		wa.devpath = hba_ptr->device_path;
121		wa.flag = (boolean_t *)calloc(1, sizeof (boolean_t));
122		*wa.flag = B_FALSE;
123
124		if (di_walk_node(root, DI_WALK_SIBFIRST, &wa,
125		    find_matching_hba) != 0) {
126			log(LOG_DEBUG, ROUTINE, "di_walk_node failed.");
127			unlock(&open_handles_lock);
128			unlock(&all_hbas_lock);
129			S_FREE(wa.flag);
130			di_fini(root);
131			return;
132		}
133
134		if (*wa.flag == B_FALSE) {
135			/*
136			 * Keep the HBA as it is including open handles
137			 * per the SM-HBA standards. Just mark it as invalid.
138			 */
139			log(LOG_DEBUG, ROUTINE, "No matching HBA found. %s",
140			    hba_ptr->device_path);
141			hba_ptr->invalid = B_TRUE;
142		}
143		S_FREE(wa.flag);
144	}
145
146	/*
147	 * Now we marked missing HBA(s). Redisoover hbas to refresh
148	 * or add any new adapter to the hba list.
149	 * Simply call devtree_get_all_hbas().
150	 */
151	if (devtree_get_all_hbas(root) != HBA_STATUS_OK) {
152		log(LOG_DEBUG, ROUTINE, "devtree_get_all_hbas failed.");
153	}
154	di_fini(root);
155
156	unlock(&open_handles_lock);
157	unlock(&all_hbas_lock);
158}
159