Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Module Name: utdelete - object deletion and reference count utilities |
| 4 | * |
| 5 | ******************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame^] | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
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> |
| 45 | #include <acpi/acinterp.h> |
| 46 | #include <acpi/acnamesp.h> |
| 47 | #include <acpi/acevents.h> |
| 48 | #include <acpi/amlcode.h> |
| 49 | |
| 50 | #define _COMPONENT ACPI_UTILITIES |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 51 | ACPI_MODULE_NAME("utdelete") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 53 | /* Local prototypes */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 54 | static void acpi_ut_delete_internal_obj(union acpi_operand_object *object); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 55 | |
| 56 | static void |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 57 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | /******************************************************************************* |
| 60 | * |
| 61 | * FUNCTION: acpi_ut_delete_internal_obj |
| 62 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 63 | * PARAMETERS: Object - Object to be deleted |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | * |
| 65 | * RETURN: None |
| 66 | * |
| 67 | * DESCRIPTION: Low level object deletion, after reference counts have been |
| 68 | * updated (All reference counts, including sub-objects!) |
| 69 | * |
| 70 | ******************************************************************************/ |
| 71 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 72 | static void acpi_ut_delete_internal_obj(union acpi_operand_object *object) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 74 | void *obj_pointer = NULL; |
| 75 | union acpi_operand_object *handler_desc; |
| 76 | union acpi_operand_object *second_desc; |
| 77 | union acpi_operand_object *next_desc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 79 | ACPI_FUNCTION_TRACE_PTR("ut_delete_internal_obj", object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
| 81 | if (!object) { |
| 82 | return_VOID; |
| 83 | } |
| 84 | |
| 85 | /* |
| 86 | * Must delete or free any pointers within the object that are not |
| 87 | * actual ACPI objects (for example, a raw buffer pointer). |
| 88 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 89 | switch (ACPI_GET_OBJECT_TYPE(object)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | case ACPI_TYPE_STRING: |
| 91 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 92 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 93 | "**** String %p, ptr %p\n", object, |
| 94 | object->string.pointer)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
| 96 | /* Free the actual string buffer */ |
| 97 | |
| 98 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { |
| 99 | /* But only if it is NOT a pointer into an ACPI table */ |
| 100 | |
| 101 | obj_pointer = object->string.pointer; |
| 102 | } |
| 103 | break; |
| 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | case ACPI_TYPE_BUFFER: |
| 106 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 107 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 108 | "**** Buffer %p, ptr %p\n", object, |
| 109 | object->buffer.pointer)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
| 111 | /* Free the actual buffer */ |
| 112 | |
| 113 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { |
| 114 | /* But only if it is NOT a pointer into an ACPI table */ |
| 115 | |
| 116 | obj_pointer = object->buffer.pointer; |
| 117 | } |
| 118 | break; |
| 119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | case ACPI_TYPE_PACKAGE: |
| 121 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 122 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 123 | " **** Package of count %X\n", |
| 124 | object->package.count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
| 126 | /* |
| 127 | * Elements of the package are not handled here, they are deleted |
| 128 | * separately |
| 129 | */ |
| 130 | |
| 131 | /* Free the (variable length) element pointer array */ |
| 132 | |
| 133 | obj_pointer = object->package.elements; |
| 134 | break; |
| 135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | case ACPI_TYPE_DEVICE: |
| 137 | |
| 138 | if (object->device.gpe_block) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 139 | (void)acpi_ev_delete_gpe_block(object->device. |
| 140 | gpe_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | /* Walk the handler list for this device */ |
| 144 | |
| 145 | handler_desc = object->device.handler; |
| 146 | while (handler_desc) { |
| 147 | next_desc = handler_desc->address_space.next; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 148 | acpi_ut_remove_reference(handler_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | handler_desc = next_desc; |
| 150 | } |
| 151 | break; |
| 152 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | case ACPI_TYPE_MUTEX: |
| 154 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 155 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 156 | "***** Mutex %p, Semaphore %p\n", |
| 157 | object, object->mutex.semaphore)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 159 | acpi_ex_unlink_mutex(object); |
| 160 | (void)acpi_os_delete_semaphore(object->mutex.semaphore); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | break; |
| 162 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | case ACPI_TYPE_EVENT: |
| 164 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 165 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 166 | "***** Event %p, Semaphore %p\n", |
| 167 | object, object->event.semaphore)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 169 | (void)acpi_os_delete_semaphore(object->event.semaphore); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | object->event.semaphore = NULL; |
| 171 | break; |
| 172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | case ACPI_TYPE_METHOD: |
| 174 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 175 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 176 | "***** Method %p\n", object)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
| 178 | /* Delete the method semaphore if it exists */ |
| 179 | |
| 180 | if (object->method.semaphore) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 181 | (void)acpi_os_delete_semaphore(object->method. |
| 182 | semaphore); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | object->method.semaphore = NULL; |
| 184 | } |
| 185 | break; |
| 186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | case ACPI_TYPE_REGION: |
| 188 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 189 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 190 | "***** Region %p\n", object)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 192 | second_desc = acpi_ns_get_secondary_object(object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | if (second_desc) { |
| 194 | /* |
| 195 | * Free the region_context if and only if the handler is one of the |
| 196 | * default handlers -- and therefore, we created the context object |
| 197 | * locally, it was not created by an external caller. |
| 198 | */ |
| 199 | handler_desc = object->region.handler; |
| 200 | if (handler_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 201 | if (handler_desc->address_space. |
| 202 | hflags & |
| 203 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) { |
| 204 | obj_pointer = |
| 205 | second_desc->extra.region_context; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | } |
| 207 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 208 | acpi_ut_remove_reference(handler_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | /* Now we can free the Extra object */ |
| 212 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 213 | acpi_ut_delete_object_desc(second_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | } |
| 215 | break; |
| 216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | case ACPI_TYPE_BUFFER_FIELD: |
| 218 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 219 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 220 | "***** Buffer Field %p\n", object)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 222 | second_desc = acpi_ns_get_secondary_object(object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | if (second_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 224 | acpi_ut_delete_object_desc(second_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | } |
| 226 | break; |
| 227 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | default: |
| 229 | break; |
| 230 | } |
| 231 | |
| 232 | /* Free any allocated memory (pointer within the object) found above */ |
| 233 | |
| 234 | if (obj_pointer) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 235 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 236 | "Deleting Object Subptr %p\n", obj_pointer)); |
| 237 | ACPI_MEM_FREE(obj_pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | /* Now the object can be safely deleted */ |
| 241 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 242 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n", |
| 243 | object, acpi_ut_get_object_type_name(object))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 245 | acpi_ut_delete_object_desc(object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | return_VOID; |
| 247 | } |
| 248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | /******************************************************************************* |
| 250 | * |
| 251 | * FUNCTION: acpi_ut_delete_internal_object_list |
| 252 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 253 | * PARAMETERS: obj_list - Pointer to the list to be deleted |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | * |
| 255 | * RETURN: None |
| 256 | * |
| 257 | * DESCRIPTION: This function deletes an internal object list, including both |
| 258 | * simple objects and package objects |
| 259 | * |
| 260 | ******************************************************************************/ |
| 261 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 262 | void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 264 | union acpi_operand_object **internal_obj; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 266 | ACPI_FUNCTION_TRACE("ut_delete_internal_object_list"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
| 268 | /* Walk the null-terminated internal list */ |
| 269 | |
| 270 | for (internal_obj = obj_list; *internal_obj; internal_obj++) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 271 | acpi_ut_remove_reference(*internal_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | /* Free the combined parameter pointer list and object array */ |
| 275 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 276 | ACPI_MEM_FREE(obj_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | return_VOID; |
| 278 | } |
| 279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | /******************************************************************************* |
| 281 | * |
| 282 | * FUNCTION: acpi_ut_update_ref_count |
| 283 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 284 | * PARAMETERS: Object - Object whose ref count is to be updated |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | * Action - What to do |
| 286 | * |
| 287 | * RETURN: New ref count |
| 288 | * |
| 289 | * DESCRIPTION: Modify the ref count and return it. |
| 290 | * |
| 291 | ******************************************************************************/ |
| 292 | |
| 293 | static void |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 294 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 296 | u16 count; |
| 297 | u16 new_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 299 | ACPI_FUNCTION_NAME("ut_update_ref_count"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
| 301 | if (!object) { |
| 302 | return; |
| 303 | } |
| 304 | |
| 305 | count = object->common.reference_count; |
| 306 | new_count = count; |
| 307 | |
| 308 | /* |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 309 | * Perform the reference count action |
| 310 | * (increment, decrement, or force delete) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | */ |
| 312 | switch (action) { |
| 313 | |
| 314 | case REF_INCREMENT: |
| 315 | |
| 316 | new_count++; |
| 317 | object->common.reference_count = new_count; |
| 318 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 319 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 320 | "Obj %p Refs=%X, [Incremented]\n", |
| 321 | object, new_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | break; |
| 323 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | case REF_DECREMENT: |
| 325 | |
| 326 | if (count < 1) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 327 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 328 | "Obj %p Refs=%X, can't decrement! (Set to 0)\n", |
| 329 | object, new_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | |
| 331 | new_count = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 332 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | new_count--; |
| 334 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 335 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 336 | "Obj %p Refs=%X, [Decremented]\n", |
| 337 | object, new_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | } |
| 339 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 340 | if (ACPI_GET_OBJECT_TYPE(object) == ACPI_TYPE_METHOD) { |
| 341 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 342 | "Method Obj %p Refs=%X, [Decremented]\n", |
| 343 | object, new_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | } |
| 345 | |
| 346 | object->common.reference_count = new_count; |
| 347 | if (new_count == 0) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 348 | acpi_ut_delete_internal_obj(object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | break; |
| 352 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | case REF_FORCE_DELETE: |
| 354 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 355 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 356 | "Obj %p Refs=%X, Force delete! (Set to 0)\n", |
| 357 | object, count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | |
| 359 | new_count = 0; |
| 360 | object->common.reference_count = new_count; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 361 | acpi_ut_delete_internal_obj(object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | break; |
| 363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | default: |
| 365 | |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame^] | 366 | ACPI_REPORT_ERROR(("Unknown action (%X)\n", action)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | break; |
| 368 | } |
| 369 | |
| 370 | /* |
| 371 | * Sanity check the reference count, for debug purposes only. |
| 372 | * (A deleted object will have a huge reference count) |
| 373 | */ |
| 374 | if (count > ACPI_MAX_REFERENCE_COUNT) { |
| 375 | |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame^] | 376 | ACPI_REPORT_WARNING(("Large Reference Count (%X) in object %p\n\n", count, object)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | } |
| 378 | |
| 379 | return; |
| 380 | } |
| 381 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | /******************************************************************************* |
| 383 | * |
| 384 | * FUNCTION: acpi_ut_update_object_reference |
| 385 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 386 | * PARAMETERS: Object - Increment ref count for this object |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | * and all sub-objects |
| 388 | * Action - Either REF_INCREMENT or REF_DECREMENT or |
| 389 | * REF_FORCE_DELETE |
| 390 | * |
| 391 | * RETURN: Status |
| 392 | * |
| 393 | * DESCRIPTION: Increment the object reference count |
| 394 | * |
| 395 | * Object references are incremented when: |
| 396 | * 1) An object is attached to a Node (namespace object) |
| 397 | * 2) An object is copied (all subobjects must be incremented) |
| 398 | * |
| 399 | * Object references are decremented when: |
| 400 | * 1) An object is detached from an Node |
| 401 | * |
| 402 | ******************************************************************************/ |
| 403 | |
| 404 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 405 | acpi_ut_update_object_reference(union acpi_operand_object * object, u16 action) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 407 | acpi_status status = AE_OK; |
| 408 | union acpi_generic_state *state_list = NULL; |
| 409 | union acpi_operand_object *next_object = NULL; |
| 410 | union acpi_generic_state *state; |
| 411 | acpi_native_uint i; |
David Shaohua Li | 4c3ffbd | 2005-07-14 00:00:00 -0400 | [diff] [blame] | 412 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 413 | ACPI_FUNCTION_TRACE_PTR("ut_update_object_reference", object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 415 | while (object) { |
| 416 | /* Make sure that this isn't a namespace handle */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 418 | if (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) { |
| 419 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 420 | "Object %p is NS handle\n", object)); |
| 421 | return_ACPI_STATUS(AE_OK); |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 422 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
| 424 | /* |
| 425 | * All sub-objects must have their reference count incremented also. |
| 426 | * Different object types have different subobjects. |
| 427 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 428 | switch (ACPI_GET_OBJECT_TYPE(object)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | case ACPI_TYPE_DEVICE: |
| 430 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 431 | acpi_ut_update_ref_count(object->device.system_notify, |
| 432 | action); |
| 433 | acpi_ut_update_ref_count(object->device.device_notify, |
| 434 | action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | break; |
| 436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | case ACPI_TYPE_PACKAGE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | /* |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 439 | * We must update all the sub-objects of the package, |
| 440 | * each of whom may have their own sub-objects. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | */ |
| 442 | for (i = 0; i < object->package.count; i++) { |
| 443 | /* |
| 444 | * Push each element onto the stack for later processing. |
| 445 | * Note: There can be null elements within the package, |
| 446 | * these are simply ignored |
| 447 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 448 | status = |
| 449 | acpi_ut_create_update_state_and_push |
| 450 | (object->package.elements[i], action, |
| 451 | &state_list); |
| 452 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | goto error_exit; |
| 454 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | } |
| 456 | break; |
| 457 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | case ACPI_TYPE_BUFFER_FIELD: |
| 459 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 460 | next_object = object->buffer_field.buffer_obj; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | break; |
| 462 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
| 464 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 465 | next_object = object->field.region_obj; |
| 466 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
| 468 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 469 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 470 | next_object = object->bank_field.bank_obj; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 471 | status = |
| 472 | acpi_ut_create_update_state_and_push(object-> |
| 473 | bank_field. |
| 474 | region_obj, |
| 475 | action, |
| 476 | &state_list); |
| 477 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | goto error_exit; |
| 479 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | break; |
| 481 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
| 483 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 484 | next_object = object->index_field.index_obj; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 485 | status = |
| 486 | acpi_ut_create_update_state_and_push(object-> |
| 487 | index_field. |
| 488 | data_obj, |
| 489 | action, |
| 490 | &state_list); |
| 491 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | goto error_exit; |
| 493 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | break; |
| 495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | case ACPI_TYPE_LOCAL_REFERENCE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | /* |
| 498 | * The target of an Index (a package, string, or buffer) must track |
| 499 | * changes to the ref count of the index. |
| 500 | */ |
| 501 | if (object->reference.opcode == AML_INDEX_OP) { |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 502 | next_object = object->reference.object; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | } |
| 504 | break; |
| 505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | case ACPI_TYPE_REGION: |
| 507 | default: |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 508 | break; /* No subobjects */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | } |
| 510 | |
| 511 | /* |
| 512 | * Now we can update the count in the main object. This can only |
| 513 | * happen after we update the sub-objects in case this causes the |
| 514 | * main object to be deleted. |
| 515 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 516 | acpi_ut_update_ref_count(object, action); |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 517 | object = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | |
| 519 | /* Move on to the next object to be updated */ |
| 520 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 521 | if (next_object) { |
| 522 | object = next_object; |
| 523 | next_object = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 524 | } else if (state_list) { |
| 525 | state = acpi_ut_pop_generic_state(&state_list); |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 526 | object = state->update.object; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 527 | acpi_ut_delete_generic_state(state); |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 528 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | } |
| 530 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 531 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 533 | error_exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 535 | ACPI_REPORT_ERROR(("Could not update object reference count, %s\n", |
| 536 | acpi_format_exception(status))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 538 | return_ACPI_STATUS(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | } |
| 540 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | /******************************************************************************* |
| 542 | * |
| 543 | * FUNCTION: acpi_ut_add_reference |
| 544 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 545 | * PARAMETERS: Object - Object whose reference count is to be |
| 546 | * incremented |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | * |
| 548 | * RETURN: None |
| 549 | * |
| 550 | * DESCRIPTION: Add one reference to an ACPI object |
| 551 | * |
| 552 | ******************************************************************************/ |
| 553 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 554 | void acpi_ut_add_reference(union acpi_operand_object *object) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | { |
| 556 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 557 | ACPI_FUNCTION_TRACE_PTR("ut_add_reference", object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | |
| 559 | /* Ensure that we have a valid object */ |
| 560 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 561 | if (!acpi_ut_valid_internal_object(object)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | return_VOID; |
| 563 | } |
| 564 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 565 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 566 | "Obj %p Current Refs=%X [To Be Incremented]\n", |
| 567 | object, object->common.reference_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
| 569 | /* Increment the reference count */ |
| 570 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 571 | (void)acpi_ut_update_object_reference(object, REF_INCREMENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | return_VOID; |
| 573 | } |
| 574 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | /******************************************************************************* |
| 576 | * |
| 577 | * FUNCTION: acpi_ut_remove_reference |
| 578 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 579 | * PARAMETERS: Object - Object whose ref count will be decremented |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | * |
| 581 | * RETURN: None |
| 582 | * |
| 583 | * DESCRIPTION: Decrement the reference count of an ACPI internal object |
| 584 | * |
| 585 | ******************************************************************************/ |
| 586 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 587 | void acpi_ut_remove_reference(union acpi_operand_object *object) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | { |
| 589 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 590 | ACPI_FUNCTION_TRACE_PTR("ut_remove_reference", object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | |
| 592 | /* |
| 593 | * Allow a NULL pointer to be passed in, just ignore it. This saves |
| 594 | * each caller from having to check. Also, ignore NS nodes. |
| 595 | * |
| 596 | */ |
| 597 | if (!object || |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 598 | (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | return_VOID; |
| 600 | } |
| 601 | |
| 602 | /* Ensure that we have a valid object */ |
| 603 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 604 | if (!acpi_ut_valid_internal_object(object)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | return_VOID; |
| 606 | } |
| 607 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 608 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 609 | "Obj %p Current Refs=%X [To Be Decremented]\n", |
| 610 | object, object->common.reference_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | |
| 612 | /* |
| 613 | * Decrement the reference count, and only actually delete the object |
| 614 | * if the reference count becomes 0. (Must also decrement the ref count |
| 615 | * of all subobjects!) |
| 616 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 617 | (void)acpi_ut_update_object_reference(object, REF_DECREMENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | return_VOID; |
| 619 | } |