Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: nsinit - namespace initialization |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | 7784813 | 2012-01-12 13:27:23 +0800 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2012, Intel Corp. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <acpi/acpi.h> |
Len Brown | e2f7a77 | 2009-01-09 00:30:03 -0500 | [diff] [blame] | 45 | #include "accommon.h" |
| 46 | #include "acnamesp.h" |
| 47 | #include "acdispat.h" |
| 48 | #include "acinterp.h" |
Ingo Molnar | 5d0e600 | 2007-02-13 13:26:24 +0100 | [diff] [blame] | 49 | #include <linux/nmi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 51 | #define _COMPONENT ACPI_NAMESPACE |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 52 | ACPI_MODULE_NAME("nsinit") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 54 | /* Local prototypes */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 55 | static acpi_status |
| 56 | acpi_ns_init_one_object(acpi_handle obj_handle, |
| 57 | u32 level, void *context, void **return_value); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 58 | |
| 59 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 60 | acpi_ns_init_one_device(acpi_handle obj_handle, |
| 61 | u32 nesting_level, void *context, void **return_value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 63 | static acpi_status |
| 64 | acpi_ns_find_ini_methods(acpi_handle obj_handle, |
| 65 | u32 nesting_level, void *context, void **return_value); |
| 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | /******************************************************************************* |
| 68 | * |
| 69 | * FUNCTION: acpi_ns_initialize_objects |
| 70 | * |
| 71 | * PARAMETERS: None |
| 72 | * |
| 73 | * RETURN: Status |
| 74 | * |
| 75 | * DESCRIPTION: Walk the entire namespace and perform any necessary |
| 76 | * initialization on the objects found therein |
| 77 | * |
| 78 | ******************************************************************************/ |
| 79 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 80 | acpi_status acpi_ns_initialize_objects(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 82 | acpi_status status; |
| 83 | struct acpi_init_walk_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 85 | ACPI_FUNCTION_TRACE(ns_initialize_objects); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 87 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
| 88 | "**** Starting initialization of namespace objects ****\n")); |
| 89 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
| 90 | "Completing Region/Field/Buffer/Package initialization:")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | /* Set all init info to zero */ |
| 93 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 94 | ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
| 96 | /* Walk entire namespace from the supplied root */ |
| 97 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 98 | status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 99 | ACPI_UINT32_MAX, acpi_ns_init_one_object, NULL, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 100 | &info, NULL); |
| 101 | if (ACPI_FAILURE(status)) { |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 102 | ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | } |
| 104 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 105 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
Alexey Starikovskiy | 96b7b7a | 2010-05-26 11:20:47 +0800 | [diff] [blame] | 106 | "\nInitialized %u/%u Regions %u/%u Fields %u/%u " |
| 107 | "Buffers %u/%u Packages (%u nodes)\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 108 | info.op_region_init, info.op_region_count, |
| 109 | info.field_init, info.field_count, |
| 110 | info.buffer_init, info.buffer_count, |
| 111 | info.package_init, info.package_count, |
| 112 | info.object_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 114 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
Alexey Starikovskiy | 96b7b7a | 2010-05-26 11:20:47 +0800 | [diff] [blame] | 115 | "%u Control Methods found\n", info.method_count)); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 116 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
Alexey Starikovskiy | 96b7b7a | 2010-05-26 11:20:47 +0800 | [diff] [blame] | 117 | "%u Op Regions found\n", info.op_region_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 119 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | } |
| 121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | /******************************************************************************* |
| 123 | * |
| 124 | * FUNCTION: acpi_ns_initialize_devices |
| 125 | * |
| 126 | * PARAMETERS: None |
| 127 | * |
| 128 | * RETURN: acpi_status |
| 129 | * |
| 130 | * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. |
| 131 | * This means running _INI on all present devices. |
| 132 | * |
| 133 | * Note: We install PCI config space handler on region access, |
| 134 | * not here. |
| 135 | * |
| 136 | ******************************************************************************/ |
| 137 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 138 | acpi_status acpi_ns_initialize_devices(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 140 | acpi_status status; |
| 141 | struct acpi_device_walk_info info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 143 | ACPI_FUNCTION_TRACE(ns_initialize_devices); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
| 145 | /* Init counters */ |
| 146 | |
| 147 | info.device_count = 0; |
| 148 | info.num_STA = 0; |
| 149 | info.num_INI = 0; |
| 150 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 151 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
Bob Moore | d4913dc | 2009-03-06 10:05:18 +0800 | [diff] [blame] | 152 | "Initializing Device/Processor/Thermal objects " |
| 153 | "by executing _INI methods:")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 155 | /* Tree analysis: find all subtrees that contain _INI methods */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 157 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 158 | ACPI_UINT32_MAX, FALSE, |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 159 | acpi_ns_find_ini_methods, NULL, &info, |
| 160 | NULL); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 161 | if (ACPI_FAILURE(status)) { |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 162 | goto error_exit; |
| 163 | } |
| 164 | |
| 165 | /* Allocate the evaluation information block */ |
| 166 | |
| 167 | info.evaluate_info = |
| 168 | ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); |
| 169 | if (!info.evaluate_info) { |
| 170 | status = AE_NO_MEMORY; |
| 171 | goto error_exit; |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 172 | } |
| 173 | |
Bob Moore | 9e64155 | 2009-09-03 10:21:03 +0800 | [diff] [blame] | 174 | /* |
| 175 | * Execute the "global" _INI method that may appear at the root. This |
| 176 | * support is provided for Windows compatibility (Vista+) and is not |
| 177 | * part of the ACPI specification. |
| 178 | */ |
| 179 | info.evaluate_info->prefix_node = acpi_gbl_root_node; |
| 180 | info.evaluate_info->pathname = METHOD_NAME__INI; |
| 181 | info.evaluate_info->parameters = NULL; |
| 182 | info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE; |
| 183 | |
| 184 | status = acpi_ns_evaluate(info.evaluate_info); |
| 185 | if (ACPI_SUCCESS(status)) { |
| 186 | info.num_INI++; |
| 187 | } |
| 188 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 189 | /* Walk namespace to execute all _INIs on present devices */ |
| 190 | |
| 191 | status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, |
| 192 | ACPI_UINT32_MAX, FALSE, |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 193 | acpi_ns_init_one_device, NULL, &info, |
| 194 | NULL); |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 195 | |
Matthew Garrett | b681f7d | 2010-05-26 11:50:48 +0800 | [diff] [blame] | 196 | /* |
| 197 | * Any _OSI requests should be completed by now. If the BIOS has |
| 198 | * requested any Windows OSI strings, we will always truncate |
| 199 | * I/O addresses to 16 bits -- for Windows compatibility. |
| 200 | */ |
| 201 | if (acpi_gbl_osi_data >= ACPI_OSI_WIN_2000) { |
| 202 | acpi_gbl_truncate_io_addresses = TRUE; |
| 203 | } |
| 204 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 205 | ACPI_FREE(info.evaluate_info); |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 206 | if (ACPI_FAILURE(status)) { |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 207 | goto error_exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | } |
| 209 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 210 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, |
Bob Moore | 5821f75 | 2010-05-26 11:48:22 +0800 | [diff] [blame] | 211 | "\nExecuted %u _INI methods requiring %u _STA executions " |
| 212 | "(examined %u objects)\n", |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 213 | info.num_INI, info.num_STA, info.device_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 215 | return_ACPI_STATUS(status); |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 216 | |
| 217 | error_exit: |
| 218 | ACPI_EXCEPTION((AE_INFO, status, "During device initialization")); |
| 219 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } |
| 221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | /******************************************************************************* |
| 223 | * |
| 224 | * FUNCTION: acpi_ns_init_one_object |
| 225 | * |
| 226 | * PARAMETERS: obj_handle - Node |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 227 | * level - Current nesting level |
| 228 | * context - Points to a init info struct |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | * return_value - Not used |
| 230 | * |
| 231 | * RETURN: Status |
| 232 | * |
| 233 | * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object |
| 234 | * within the namespace. |
| 235 | * |
| 236 | * Currently, the only objects that require initialization are: |
| 237 | * 1) Methods |
| 238 | * 2) Op Regions |
| 239 | * |
| 240 | ******************************************************************************/ |
| 241 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 242 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 243 | acpi_ns_init_one_object(acpi_handle obj_handle, |
| 244 | u32 level, void *context, void **return_value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 246 | acpi_object_type type; |
Len Brown | 4d2acd9 | 2007-05-09 22:56:38 -0400 | [diff] [blame] | 247 | acpi_status status = AE_OK; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 248 | struct acpi_init_walk_info *info = |
| 249 | (struct acpi_init_walk_info *)context; |
| 250 | struct acpi_namespace_node *node = |
| 251 | (struct acpi_namespace_node *)obj_handle; |
| 252 | union acpi_operand_object *obj_desc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 254 | ACPI_FUNCTION_NAME(ns_init_one_object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
| 256 | info->object_count++; |
| 257 | |
| 258 | /* And even then, we are only interested in a few object types */ |
| 259 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 260 | type = acpi_ns_get_type(obj_handle); |
| 261 | obj_desc = acpi_ns_get_attached_object(node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | if (!obj_desc) { |
| 263 | return (AE_OK); |
| 264 | } |
| 265 | |
| 266 | /* Increment counters for object types we are looking for */ |
| 267 | |
| 268 | switch (type) { |
| 269 | case ACPI_TYPE_REGION: |
| 270 | info->op_region_count++; |
| 271 | break; |
| 272 | |
| 273 | case ACPI_TYPE_BUFFER_FIELD: |
| 274 | info->field_count++; |
| 275 | break; |
| 276 | |
Lin Ming | ef805d9 | 2008-04-10 19:06:41 +0400 | [diff] [blame] | 277 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 278 | info->field_count++; |
| 279 | break; |
| 280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | case ACPI_TYPE_BUFFER: |
| 282 | info->buffer_count++; |
| 283 | break; |
| 284 | |
| 285 | case ACPI_TYPE_PACKAGE: |
| 286 | info->package_count++; |
| 287 | break; |
| 288 | |
| 289 | default: |
| 290 | |
| 291 | /* No init required, just exit now */ |
| 292 | return (AE_OK); |
| 293 | } |
| 294 | |
Bob Moore | d4913dc | 2009-03-06 10:05:18 +0800 | [diff] [blame] | 295 | /* If the object is already initialized, nothing else to do */ |
| 296 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { |
| 298 | return (AE_OK); |
| 299 | } |
| 300 | |
Bob Moore | d4913dc | 2009-03-06 10:05:18 +0800 | [diff] [blame] | 301 | /* Must lock the interpreter before executing AML code */ |
| 302 | |
Len Brown | 4d2acd9 | 2007-05-09 22:56:38 -0400 | [diff] [blame] | 303 | acpi_ex_enter_interpreter(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | |
| 305 | /* |
| 306 | * Each of these types can contain executable AML code within the |
| 307 | * declaration. |
| 308 | */ |
| 309 | switch (type) { |
| 310 | case ACPI_TYPE_REGION: |
| 311 | |
| 312 | info->op_region_init++; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 313 | status = acpi_ds_get_region_arguments(obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | break; |
| 315 | |
| 316 | case ACPI_TYPE_BUFFER_FIELD: |
| 317 | |
| 318 | info->field_init++; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 319 | status = acpi_ds_get_buffer_field_arguments(obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | break; |
| 321 | |
Lin Ming | ef805d9 | 2008-04-10 19:06:41 +0400 | [diff] [blame] | 322 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 323 | |
| 324 | info->field_init++; |
| 325 | status = acpi_ds_get_bank_field_arguments(obj_desc); |
| 326 | break; |
| 327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | case ACPI_TYPE_BUFFER: |
| 329 | |
| 330 | info->buffer_init++; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 331 | status = acpi_ds_get_buffer_arguments(obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | break; |
| 333 | |
| 334 | case ACPI_TYPE_PACKAGE: |
| 335 | |
| 336 | info->package_init++; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 337 | status = acpi_ds_get_package_arguments(obj_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | break; |
| 339 | |
| 340 | default: |
| 341 | /* No other types can get here */ |
| 342 | break; |
| 343 | } |
| 344 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 345 | if (ACPI_FAILURE(status)) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 346 | ACPI_EXCEPTION((AE_INFO, status, |
| 347 | "Could not execute arguments for [%4.4s] (%s)", |
| 348 | acpi_ut_get_node_name(node), |
| 349 | acpi_ut_get_type_name(type))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | /* |
| 353 | * Print a dot for each object unless we are going to print the entire |
| 354 | * pathname |
| 355 | */ |
| 356 | if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 357 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, ".")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | } |
| 359 | |
| 360 | /* |
| 361 | * We ignore errors from above, and always return OK, since we don't want |
| 362 | * to abort the walk on any single error. |
| 363 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 364 | acpi_ex_exit_interpreter(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | return (AE_OK); |
| 366 | } |
| 367 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | /******************************************************************************* |
| 369 | * |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 370 | * FUNCTION: acpi_ns_find_ini_methods |
| 371 | * |
| 372 | * PARAMETERS: acpi_walk_callback |
| 373 | * |
| 374 | * RETURN: acpi_status |
| 375 | * |
| 376 | * DESCRIPTION: Called during namespace walk. Finds objects named _INI under |
| 377 | * device/processor/thermal objects, and marks the entire subtree |
| 378 | * with a SUBTREE_HAS_INI flag. This flag is used during the |
| 379 | * subsequent device initialization walk to avoid entire subtrees |
| 380 | * that do not contain an _INI. |
| 381 | * |
| 382 | ******************************************************************************/ |
| 383 | |
| 384 | static acpi_status |
| 385 | acpi_ns_find_ini_methods(acpi_handle obj_handle, |
| 386 | u32 nesting_level, void *context, void **return_value) |
| 387 | { |
| 388 | struct acpi_device_walk_info *info = |
| 389 | ACPI_CAST_PTR(struct acpi_device_walk_info, context); |
| 390 | struct acpi_namespace_node *node; |
| 391 | struct acpi_namespace_node *parent_node; |
| 392 | |
| 393 | /* Keep count of device/processor/thermal objects */ |
| 394 | |
| 395 | node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); |
| 396 | if ((node->type == ACPI_TYPE_DEVICE) || |
| 397 | (node->type == ACPI_TYPE_PROCESSOR) || |
| 398 | (node->type == ACPI_TYPE_THERMAL)) { |
| 399 | info->device_count++; |
| 400 | return (AE_OK); |
| 401 | } |
| 402 | |
| 403 | /* We are only looking for methods named _INI */ |
| 404 | |
| 405 | if (!ACPI_COMPARE_NAME(node->name.ascii, METHOD_NAME__INI)) { |
| 406 | return (AE_OK); |
| 407 | } |
| 408 | |
| 409 | /* |
| 410 | * The only _INI methods that we care about are those that are |
| 411 | * present under Device, Processor, and Thermal objects. |
| 412 | */ |
Alexey Starikovskiy | c45b5c0 | 2010-05-26 11:53:07 +0800 | [diff] [blame] | 413 | parent_node = node->parent; |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 414 | switch (parent_node->type) { |
| 415 | case ACPI_TYPE_DEVICE: |
| 416 | case ACPI_TYPE_PROCESSOR: |
| 417 | case ACPI_TYPE_THERMAL: |
| 418 | |
| 419 | /* Mark parent and bubble up the INI present flag to the root */ |
| 420 | |
| 421 | while (parent_node) { |
| 422 | parent_node->flags |= ANOBJ_SUBTREE_HAS_INI; |
Alexey Starikovskiy | c45b5c0 | 2010-05-26 11:53:07 +0800 | [diff] [blame] | 423 | parent_node = parent_node->parent; |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 424 | } |
| 425 | break; |
| 426 | |
| 427 | default: |
| 428 | break; |
| 429 | } |
| 430 | |
| 431 | return (AE_OK); |
| 432 | } |
| 433 | |
| 434 | /******************************************************************************* |
| 435 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | * FUNCTION: acpi_ns_init_one_device |
| 437 | * |
| 438 | * PARAMETERS: acpi_walk_callback |
| 439 | * |
| 440 | * RETURN: acpi_status |
| 441 | * |
| 442 | * DESCRIPTION: This is called once per device soon after ACPI is enabled |
| 443 | * to initialize each device. It determines if the device is |
| 444 | * present, and if so, calls _INI. |
| 445 | * |
| 446 | ******************************************************************************/ |
| 447 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 448 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 449 | acpi_ns_init_one_device(acpi_handle obj_handle, |
| 450 | u32 nesting_level, void *context, void **return_value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | { |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 452 | struct acpi_device_walk_info *walk_info = |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 453 | ACPI_CAST_PTR(struct acpi_device_walk_info, context); |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 454 | struct acpi_evaluate_info *info = walk_info->evaluate_info; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 455 | u32 flags; |
| 456 | acpi_status status; |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 457 | struct acpi_namespace_node *device_node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 459 | ACPI_FUNCTION_TRACE(ns_init_one_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 461 | /* We are interested in Devices, Processors and thermal_zones only */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 463 | device_node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle); |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 464 | if ((device_node->type != ACPI_TYPE_DEVICE) && |
| 465 | (device_node->type != ACPI_TYPE_PROCESSOR) && |
| 466 | (device_node->type != ACPI_TYPE_THERMAL)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 467 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | } |
| 469 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 470 | /* |
| 471 | * Because of an earlier namespace analysis, all subtrees that contain an |
| 472 | * _INI method are tagged. |
| 473 | * |
| 474 | * If this device subtree does not contain any _INI methods, we |
| 475 | * can exit now and stop traversing this entire subtree. |
| 476 | */ |
| 477 | if (!(device_node->flags & ANOBJ_SUBTREE_HAS_INI)) { |
| 478 | return_ACPI_STATUS(AE_CTRL_DEPTH); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | } |
| 480 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | /* |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 482 | * Run _STA to determine if this device is present and functioning. We |
| 483 | * must know this information for two important reasons (from ACPI spec): |
| 484 | * |
| 485 | * 1) We can only run _INI if the device is present. |
| 486 | * 2) We must abort the device tree walk on this subtree if the device is |
| 487 | * not present and is not functional (we will not examine the children) |
| 488 | * |
| 489 | * The _STA method is not required to be present under the device, we |
| 490 | * assume the device is present if _STA does not exist. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | */ |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 492 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
| 493 | (ACPI_TYPE_METHOD, device_node, METHOD_NAME__STA)); |
| 494 | |
| 495 | status = acpi_ut_execute_STA(device_node, &flags); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 496 | if (ACPI_FAILURE(status)) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 497 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 498 | /* Ignore error and move on to next device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 500 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
| 502 | |
| 503 | /* |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 504 | * Flags == -1 means that _STA was not found. In this case, we assume that |
| 505 | * the device is both present and functional. |
| 506 | * |
| 507 | * From the ACPI spec, description of _STA: |
| 508 | * |
| 509 | * "If a device object (including the processor object) does not have an |
| 510 | * _STA object, then OSPM assumes that all of the above bits are set (in |
| 511 | * other words, the device is present, ..., and functioning)" |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 512 | */ |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 513 | if (flags != ACPI_UINT32_MAX) { |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 514 | walk_info->num_STA++; |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 515 | } |
| 516 | |
| 517 | /* |
| 518 | * Examine the PRESENT and FUNCTIONING status bits |
| 519 | * |
| 520 | * Note: ACPI spec does not seem to specify behavior for the present but |
| 521 | * not functioning case, so we assume functioning if present. |
| 522 | */ |
| 523 | if (!(flags & ACPI_STA_DEVICE_PRESENT)) { |
| 524 | |
| 525 | /* Device is not present, we must examine the Functioning bit */ |
| 526 | |
| 527 | if (flags & ACPI_STA_DEVICE_FUNCTIONING) { |
| 528 | /* |
| 529 | * Device is not present but is "functioning". In this case, |
| 530 | * we will not run _INI, but we continue to examine the children |
| 531 | * of this device. |
| 532 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 533 | * From the ACPI spec, description of _STA: (note - no mention |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 534 | * of whether to run _INI or not on the device in question) |
| 535 | * |
| 536 | * "_STA may return bit 0 clear (not present) with bit 3 set |
| 537 | * (device is functional). This case is used to indicate a valid |
| 538 | * device for which no device driver should be loaded (for example, |
| 539 | * a bridge device.) Children of this device may be present and |
| 540 | * valid. OSPM should continue enumeration below a device whose |
| 541 | * _STA returns this bit combination" |
| 542 | */ |
| 543 | return_ACPI_STATUS(AE_OK); |
| 544 | } else { |
| 545 | /* |
| 546 | * Device is not present and is not functioning. We must abort the |
| 547 | * walk of this subtree immediately -- don't look at the children |
| 548 | * of such a device. |
| 549 | * |
| 550 | * From the ACPI spec, description of _INI: |
| 551 | * |
| 552 | * "If the _STA method indicates that the device is not present, |
| 553 | * OSPM will not run the _INI and will not examine the children |
| 554 | * of the device for _INI methods" |
| 555 | */ |
| 556 | return_ACPI_STATUS(AE_CTRL_DEPTH); |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | /* |
| 561 | * The device is present or is assumed present if no _STA exists. |
| 562 | * Run the _INI if it exists (not required to exist) |
| 563 | * |
| 564 | * Note: We know there is an _INI within this subtree, but it may not be |
| 565 | * under this particular device, it may be lower in the branch. |
| 566 | */ |
| 567 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
| 568 | (ACPI_TYPE_METHOD, device_node, METHOD_NAME__INI)); |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 569 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 570 | info->prefix_node = device_node; |
| 571 | info->pathname = METHOD_NAME__INI; |
| 572 | info->parameters = NULL; |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 573 | info->flags = ACPI_IGNORE_RETURN_VALUE; |
Bob Moore | defba1d | 2005-12-16 17:05:00 -0500 | [diff] [blame] | 574 | |
Ingo Molnar | 5d0e600 | 2007-02-13 13:26:24 +0100 | [diff] [blame] | 575 | /* |
| 576 | * Some hardware relies on this being executed as atomically |
| 577 | * as possible (without an NMI being received in the middle of |
| 578 | * this) - so disable NMIs and initialize the device: |
| 579 | */ |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 580 | status = acpi_ns_evaluate(info); |
Ingo Molnar | 5d0e600 | 2007-02-13 13:26:24 +0100 | [diff] [blame] | 581 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 582 | if (ACPI_SUCCESS(status)) { |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 583 | walk_info->num_INI++; |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 584 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 585 | if ((acpi_dbg_level <= ACPI_LV_ALL_EXCEPTIONS) && |
| 586 | (!(acpi_dbg_level & ACPI_LV_INFO))) { |
| 587 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, ".")); |
| 588 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | } |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 590 | #ifdef ACPI_DEBUG_OUTPUT |
| 591 | else if (status != AE_NOT_FOUND) { |
| 592 | |
| 593 | /* Ignore error and move on to next device */ |
| 594 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 595 | char *scope_name = |
| 596 | acpi_ns_get_external_pathname(info->resolved_node); |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 597 | |
| 598 | ACPI_EXCEPTION((AE_INFO, status, "during %s._INI execution", |
| 599 | scope_name)); |
| 600 | ACPI_FREE(scope_name); |
| 601 | } |
| 602 | #endif |
| 603 | |
Bob Moore | 4c90ece | 2006-06-08 16:29:00 -0400 | [diff] [blame] | 604 | /* Ignore errors from above */ |
| 605 | |
| 606 | status = AE_OK; |
| 607 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 608 | /* |
| 609 | * The _INI method has been run if present; call the Global Initialization |
| 610 | * Handler for this device. |
| 611 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | if (acpi_gbl_init_handler) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 613 | status = |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 614 | acpi_gbl_init_handler(device_node, ACPI_INIT_DEVICE_INI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | } |
| 616 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 617 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | } |