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_scope_probe(acpidev_walk_info_t *infop);
36 static acpidev_filter_result_t acpidev_scope_filter(acpidev_walk_info_t *infop,
37 char *devname, int maxlen);
38 static ACPI_STATUS acpidev_scope_init(acpidev_walk_info_t *infop);
39
40 /*
41 * Default class driver for ACPI scope objects.
42 * This class driver is used to handle predefined ACPI SCOPE objects
43 * under the ACPI root object, such as _PR_, _SB_ and _TZ_ etc.
44 * The default policy for ACPI SCOPE objects is SKIP.
45 */
46 acpidev_class_t acpidev_class_scope = {
47 0, /* adc_refcnt */
48 ACPIDEV_CLASS_REV1, /* adc_version */
49 ACPIDEV_CLASS_ID_SCOPE, /* adc_class_id */
50 "ACPI Scope", /* adc_class_name */
51 ACPIDEV_TYPE_SCOPE, /* adc_dev_type */
52 NULL, /* adc_private */
53 NULL, /* adc_pre_probe */
54 NULL, /* adc_post_probe */
55 acpidev_scope_probe, /* adc_probe */
56 acpidev_scope_filter, /* adc_filter */
57 acpidev_scope_init, /* adc_init */
58 NULL, /* adc_fini */
59 };
60
61 acpidev_class_list_t *acpidev_class_list_scope = NULL;
62
63 /*
64 * All SCOPE objects share a global pseudo unit address space across the system.
65 */
66 static uint32_t acpidev_scope_unitaddr = 0;
67
68 /* Filter rule table for ACPI SCOPE objects. */
69 static acpidev_filter_rule_t acpidev_scope_filters[] = {
70 { /* For safety, _SB_ is hardcoded as DEVICE by acpica */
71 NULL,
72 0,
73 ACPIDEV_FILTER_DEFAULT,
74 &acpidev_class_list_device,
75 1,
76 1,
77 ACPIDEV_OBJECT_NAME_SB,
78 ACPIDEV_NODE_NAME_MODULE_SBD,
79 },
80 { /* Handle _PR_ object. */
81 NULL,
82 0,
83 ACPIDEV_FILTER_SCAN,
84 &acpidev_class_list_scope,
85 1,
86 1,
87 ACPIDEV_OBJECT_NAME_PR,
88 ACPIDEV_NODE_NAME_PROCESSOR,
89 },
90 { /* Ignore all other scope objects. */
91 NULL,
92 0,
93 ACPIDEV_FILTER_SKIP,
94 NULL,
95 1,
96 INT_MAX,
97 NULL,
98 NULL,
99 }
100 };
101
102 static ACPI_STATUS
103 acpidev_scope_probe(acpidev_walk_info_t *infop)
104 {
105 ACPI_STATUS rc = AE_OK;
106 int flags;
107
108 ASSERT(infop != NULL);
109 ASSERT(infop->awi_hdl != NULL);
110 ASSERT(infop->awi_info != NULL);
111 if (infop->awi_info->Type != ACPI_TYPE_LOCAL_SCOPE) {
112 return (AE_OK);
113 }
114
115 flags = ACPIDEV_PROCESS_FLAG_SCAN;
116 switch (infop->awi_op_type) {
117 case ACPIDEV_OP_BOOT_PROBE:
118 flags |= ACPIDEV_PROCESS_FLAG_CREATE;
119 break;
120
121 case ACPIDEV_OP_BOOT_REPROBE:
122 break;
123
124 case ACPIDEV_OP_HOTPLUG_PROBE:
125 flags |= ACPIDEV_PROCESS_FLAG_SYNCSTATUS |
126 ACPIDEV_PROCESS_FLAG_HOLDBRANCH;
127 break;
128
129 default:
130 ACPIDEV_DEBUG(CE_WARN, "!acpidev: unknown operation type %u "
131 "in acpidev_scope_probe().", infop->awi_op_type);
132 rc = AE_BAD_PARAMETER;
133 break;
134 }
135
136 if (rc == AE_OK) {
137 rc = acpidev_process_object(infop, flags);
138 }
139 if (ACPI_FAILURE(rc) && rc != AE_NOT_EXIST && rc != AE_ALREADY_EXISTS) {
140 cmn_err(CE_WARN,
141 "!acpidev: failed to process scope object %s.",
142 infop->awi_name);
143 } else {
144 rc = AE_OK;
145 }
146
147 return (rc);
148 }
149
150 static acpidev_filter_result_t
151 acpidev_scope_filter(acpidev_walk_info_t *infop, char *devname, int maxlen)
152 {
153 acpidev_filter_result_t res;
154
155 ASSERT(infop != NULL);
156 if (infop->awi_op_type == ACPIDEV_OP_BOOT_PROBE ||
157 infop->awi_op_type == ACPIDEV_OP_BOOT_REPROBE ||
158 infop->awi_op_type == ACPIDEV_OP_HOTPLUG_PROBE) {
159 res = acpidev_filter_device(infop, infop->awi_hdl,
160 ACPIDEV_ARRAY_PARAM(acpidev_scope_filters),
161 devname, maxlen);
162 } else {
163 ACPIDEV_DEBUG(CE_WARN, "!acpidev: unknown operation type %u "
164 "in acpidev_scope_filter().", infop->awi_op_type);
165 res = ACPIDEV_FILTER_FAILED;
166 }
167
168 return (res);
169 }
170
171 static ACPI_STATUS
172 acpidev_scope_init(acpidev_walk_info_t *infop)
173 {
174 char unitaddr[32];
175 char *compatible[] = {
176 ACPIDEV_HID_SCOPE,
177 ACPIDEV_TYPE_SCOPE,
178 ACPIDEV_HID_VIRTNEX,
179 ACPIDEV_TYPE_VIRTNEX,
180 };
181
182 ASSERT(infop != NULL);
183 ASSERT(infop->awi_hdl != NULL);
184 ASSERT(infop->awi_dip != NULL);
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_scope_unitaddr) - 1);
191 if (ACPI_FAILURE(acpidev_set_unitaddr(infop, NULL, 0, unitaddr))) {
192 return (AE_ERROR);
193 }
194
195 return (AE_OK);
196 }