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 * Copyright (c) 2009-2010, Intel Corporation.
23 * All rights reserved.
24 */
25
26 #include <sys/types.h>
27 #include <sys/atomic.h>
28 #include <sys/sunddi.h>
29 #include <sys/sunndi.h>
30 #include <sys/acpi/acpi.h>
31 #include <sys/acpica.h>
32 #include <sys/acpidev.h>
33 #include <sys/acpidev_impl.h>
34
35 static ACPI_STATUS acpidev_device_probe(acpidev_walk_info_t *infop);
36 static acpidev_filter_result_t acpidev_device_filter(acpidev_walk_info_t *infop,
37 char *devname, int maxlen);
38 static ACPI_STATUS acpidev_device_init(acpidev_walk_info_t *infop);
39
40 static uint32_t acpidev_device_unitaddr = 0;
41
42 /*
43 * Default class driver for ACPI DEVICE objects.
44 * The default policy for DEVICE objects is to scan child objects without
45 * creating device nodes. But some special DEVICE objects will have device
46 * nodes created for them.
47 */
48 acpidev_class_t acpidev_class_device = {
49 0, /* adc_refcnt */
50 ACPIDEV_CLASS_REV1, /* adc_version */
51 ACPIDEV_CLASS_ID_DEVICE, /* adc_class_id */
52 "ACPI Device", /* adc_class_name */
53 ACPIDEV_TYPE_DEVICE, /* adc_dev_type */
54 NULL, /* adc_private */
55 NULL, /* adc_pre_probe */
56 NULL, /* adc_post_probe */
57 acpidev_device_probe, /* adc_probe */
58 acpidev_device_filter, /* adc_filter */
59 acpidev_device_init, /* adc_init */
60 NULL, /* adc_fini */
61 };
62
63 /*
64 * List of class drivers which will be called in order when handling
65 * children of ACPI DEVICE objects.
66 */
67 acpidev_class_list_t *acpidev_class_list_device = NULL;
68
69 /* Filter rule table for boot. */
70 static acpidev_filter_rule_t acpidev_device_filters[] = {
71 { /* _SB_ object type is hardcoded to DEVICE by acpica */
72 NULL,
73 0,
74 ACPIDEV_FILTER_DEFAULT,
75 &acpidev_class_list_device,
76 1,
77 1,
78 ACPIDEV_OBJECT_NAME_SB,
79 ACPIDEV_NODE_NAME_MODULE_SBD,
80 },
81 { /* Ignore other device objects under ACPI root object */
82 NULL,
83 0,
84 ACPIDEV_FILTER_SKIP,
85 NULL,
86 1,
87 1,
88 NULL,
89 NULL,
90 },
91 { /* Scan other device objects not directly under ACPI root */
92 NULL,
93 0,
94 ACPIDEV_FILTER_SKIP,
95 &acpidev_class_list_device,
96 2,
97 INT_MAX,
98 NULL,
99 NULL,
100 }
101 };
102
103 static ACPI_STATUS
104 acpidev_device_probe(acpidev_walk_info_t *infop)
105 {
106 ACPI_STATUS rc = AE_OK;
107 int flags;
108
109 ASSERT(infop != NULL);
110 ASSERT(infop->awi_hdl != NULL);
111 ASSERT(infop->awi_info != NULL);
112
113 if (infop->awi_info->Type != ACPI_TYPE_DEVICE) {
114 return (AE_OK);
115 }
116
117 flags = ACPIDEV_PROCESS_FLAG_SCAN;
118 switch (infop->awi_op_type) {
119 case ACPIDEV_OP_BOOT_PROBE:
120 flags |= ACPIDEV_PROCESS_FLAG_CREATE;
121 break;
122
123 case ACPIDEV_OP_BOOT_REPROBE:
124 break;
125
126 case ACPIDEV_OP_HOTPLUG_PROBE:
127 flags |= ACPIDEV_PROCESS_FLAG_CREATE |
128 ACPIDEV_PROCESS_FLAG_SYNCSTATUS |
129 ACPIDEV_PROCESS_FLAG_HOLDBRANCH;
130 break;
131
132 default:
133 ACPIDEV_DEBUG(CE_WARN,
134 "!acpidev: unknown operation type %u in "
135 "acpi_device_probe().", infop->awi_op_type);
136 rc = AE_BAD_PARAMETER;
137 break;
138 }
139
140 if (rc == AE_OK) {
141 rc = acpidev_process_object(infop, flags);
142 }
143 if (ACPI_FAILURE(rc) && rc != AE_NOT_EXIST && rc != AE_ALREADY_EXISTS) {
144 cmn_err(CE_WARN,
145 "!acpidev: failed to process device object %s.",
146 infop->awi_name);
147 } else {
148 rc = AE_OK;
149 }
150
151 return (rc);
152 }
153
154 static acpidev_filter_result_t
155 acpidev_device_filter(acpidev_walk_info_t *infop, char *devname, int maxlen)
156 {
157 acpidev_filter_result_t res;
158
159 ASSERT(infop != NULL);
160 if (infop->awi_op_type == ACPIDEV_OP_BOOT_PROBE ||
161 infop->awi_op_type == ACPIDEV_OP_BOOT_REPROBE ||
162 infop->awi_op_type == ACPIDEV_OP_HOTPLUG_PROBE) {
163 res = acpidev_filter_device(infop, infop->awi_hdl,
164 ACPIDEV_ARRAY_PARAM(acpidev_device_filters),
165 devname, maxlen);
166 } else {
167 ACPIDEV_DEBUG(CE_WARN, "!acpidev: unknown operation type %u "
168 "in acpidev_device_filter().", infop->awi_op_type);
169 res = ACPIDEV_FILTER_FAILED;
170 }
171
172 return (res);
173 }
174
175 static ACPI_STATUS
176 acpidev_device_init(acpidev_walk_info_t *infop)
177 {
178 char unitaddr[32];
179 char *compatible[] = {
180 ACPIDEV_TYPE_DEVICE,
181 ACPIDEV_HID_VIRTNEX,
182 ACPIDEV_TYPE_VIRTNEX,
183 };
184
185 if (ACPI_FAILURE(acpidev_set_compatible(infop,
186 ACPIDEV_ARRAY_PARAM(compatible)))) {
187 return (AE_ERROR);
188 }
189 (void) snprintf(unitaddr, sizeof (unitaddr), "%u",
190 atomic_inc_32_nv(&acpidev_device_unitaddr) - 1);
191 if (ACPI_FAILURE(acpidev_set_unitaddr(infop, NULL, 0, unitaddr))) {
192 return (AE_ERROR);
193 }
194
195 return (AE_OK);
196 }