Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 3 | * Module Name: utalloc - local memory allocation routines |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
Bob Moore | 25f044e | 2013-01-25 05:38:56 +0000 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2013, 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 "acdebug.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | #define _COMPONENT ACPI_UTILITIES |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 49 | ACPI_MODULE_NAME("utalloc") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Lv Zheng | b3c86c3 | 2013-10-29 09:29:27 +0800 | [diff] [blame^] | 51 | #if !defined (USE_NATIVE_ALLOCATE_ZEROED) |
| 52 | /******************************************************************************* |
| 53 | * |
| 54 | * FUNCTION: acpi_os_allocate_zeroed |
| 55 | * |
| 56 | * PARAMETERS: size - Size of the allocation |
| 57 | * |
| 58 | * RETURN: Address of the allocated memory on success, NULL on failure. |
| 59 | * |
| 60 | * DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory. |
| 61 | * This is the default implementation. Can be overridden via the |
| 62 | * USE_NATIVE_ALLOCATE_ZEROED flag. |
| 63 | * |
| 64 | ******************************************************************************/ |
| 65 | void *acpi_os_allocate_zeroed(acpi_size size) |
| 66 | { |
| 67 | void *allocation; |
| 68 | |
| 69 | ACPI_FUNCTION_ENTRY(); |
| 70 | |
| 71 | allocation = acpi_os_allocate(size); |
| 72 | if (allocation) { |
| 73 | |
| 74 | /* Clear the memory block */ |
| 75 | |
| 76 | ACPI_MEMSET(allocation, 0, size); |
| 77 | } |
| 78 | |
| 79 | return (allocation); |
| 80 | } |
| 81 | |
| 82 | #endif /* !USE_NATIVE_ALLOCATE_ZEROED */ |
| 83 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 84 | /******************************************************************************* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | * |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 86 | * FUNCTION: acpi_ut_create_caches |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | * |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 88 | * PARAMETERS: None |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | * |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 90 | * RETURN: Status |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | * |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 92 | * DESCRIPTION: Create all local caches |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | * |
| 94 | ******************************************************************************/ |
Lv Zheng | b3c86c3 | 2013-10-29 09:29:27 +0800 | [diff] [blame^] | 95 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 96 | acpi_status acpi_ut_create_caches(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 98 | acpi_status status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 100 | /* Object Caches, for frequently used objects */ |
| 101 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 102 | status = |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 103 | acpi_os_create_cache("Acpi-Namespace", |
| 104 | sizeof(struct acpi_namespace_node), |
| 105 | ACPI_MAX_NAMESPACE_CACHE_DEPTH, |
| 106 | &acpi_gbl_namespace_cache); |
| 107 | if (ACPI_FAILURE(status)) { |
| 108 | return (status); |
| 109 | } |
| 110 | |
| 111 | status = |
| 112 | acpi_os_create_cache("Acpi-State", sizeof(union acpi_generic_state), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 113 | ACPI_MAX_STATE_CACHE_DEPTH, |
| 114 | &acpi_gbl_state_cache); |
| 115 | if (ACPI_FAILURE(status)) { |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 116 | return (status); |
| 117 | } |
| 118 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 119 | status = |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 120 | acpi_os_create_cache("Acpi-Parse", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 121 | sizeof(struct acpi_parse_obj_common), |
| 122 | ACPI_MAX_PARSE_CACHE_DEPTH, |
| 123 | &acpi_gbl_ps_node_cache); |
| 124 | if (ACPI_FAILURE(status)) { |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 125 | return (status); |
| 126 | } |
| 127 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 128 | status = |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 129 | acpi_os_create_cache("Acpi-ParseExt", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 130 | sizeof(struct acpi_parse_obj_named), |
| 131 | ACPI_MAX_EXTPARSE_CACHE_DEPTH, |
| 132 | &acpi_gbl_ps_node_ext_cache); |
| 133 | if (ACPI_FAILURE(status)) { |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 134 | return (status); |
| 135 | } |
| 136 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 137 | status = |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 138 | acpi_os_create_cache("Acpi-Operand", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 139 | sizeof(union acpi_operand_object), |
| 140 | ACPI_MAX_OBJECT_CACHE_DEPTH, |
| 141 | &acpi_gbl_operand_cache); |
| 142 | if (ACPI_FAILURE(status)) { |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 143 | return (status); |
| 144 | } |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 145 | #ifdef ACPI_DBG_TRACK_ALLOCATIONS |
| 146 | |
| 147 | /* Memory allocation lists */ |
| 148 | |
| 149 | status = acpi_ut_create_list("Acpi-Global", 0, &acpi_gbl_global_list); |
| 150 | if (ACPI_FAILURE(status)) { |
| 151 | return (status); |
| 152 | } |
| 153 | |
| 154 | status = |
| 155 | acpi_ut_create_list("Acpi-Namespace", |
| 156 | sizeof(struct acpi_namespace_node), |
| 157 | &acpi_gbl_ns_node_list); |
| 158 | if (ACPI_FAILURE(status)) { |
| 159 | return (status); |
| 160 | } |
| 161 | #endif |
| 162 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 163 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | } |
| 165 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 166 | /******************************************************************************* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | * |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 168 | * FUNCTION: acpi_ut_delete_caches |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | * |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 170 | * PARAMETERS: None |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | * |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 172 | * RETURN: Status |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | * |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 174 | * DESCRIPTION: Purge and delete all local caches |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | * |
| 176 | ******************************************************************************/ |
| 177 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 178 | acpi_status acpi_ut_delete_caches(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | { |
Bob Moore | d41eb99 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 180 | #ifdef ACPI_DBG_TRACK_ALLOCATIONS |
| 181 | char buffer[7]; |
| 182 | |
| 183 | if (acpi_gbl_display_final_mem_stats) { |
| 184 | ACPI_STRCPY(buffer, "MEMORY"); |
Bob Moore | 1d18c05 | 2008-04-10 19:06:40 +0400 | [diff] [blame] | 185 | (void)acpi_db_display_statistics(buffer); |
Bob Moore | d41eb99 | 2007-02-02 19:48:23 +0300 | [diff] [blame] | 186 | } |
| 187 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 189 | (void)acpi_os_delete_cache(acpi_gbl_namespace_cache); |
| 190 | acpi_gbl_namespace_cache = NULL; |
| 191 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 192 | (void)acpi_os_delete_cache(acpi_gbl_state_cache); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 193 | acpi_gbl_state_cache = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 195 | (void)acpi_os_delete_cache(acpi_gbl_operand_cache); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 196 | acpi_gbl_operand_cache = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 198 | (void)acpi_os_delete_cache(acpi_gbl_ps_node_cache); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 199 | acpi_gbl_ps_node_cache = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 201 | (void)acpi_os_delete_cache(acpi_gbl_ps_node_ext_cache); |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 202 | acpi_gbl_ps_node_ext_cache = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 204 | #ifdef ACPI_DBG_TRACK_ALLOCATIONS |
| 205 | |
| 206 | /* Debug only - display leftover memory allocation, if any */ |
| 207 | |
| 208 | acpi_ut_dump_allocations(ACPI_UINT32_MAX, NULL); |
| 209 | |
| 210 | /* Free memory lists */ |
| 211 | |
Len Brown | 02438d8 | 2006-06-30 03:19:10 -0400 | [diff] [blame] | 212 | ACPI_FREE(acpi_gbl_global_list); |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 213 | acpi_gbl_global_list = NULL; |
| 214 | |
Len Brown | 02438d8 | 2006-06-30 03:19:10 -0400 | [diff] [blame] | 215 | ACPI_FREE(acpi_gbl_ns_node_list); |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 216 | acpi_gbl_ns_node_list = NULL; |
| 217 | #endif |
| 218 | |
Robert Moore | 73459f7 | 2005-06-24 00:00:00 -0400 | [diff] [blame] | 219 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
| 222 | /******************************************************************************* |
| 223 | * |
| 224 | * FUNCTION: acpi_ut_validate_buffer |
| 225 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 226 | * PARAMETERS: buffer - Buffer descriptor to be validated |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | * |
| 228 | * RETURN: Status |
| 229 | * |
| 230 | * DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer |
| 231 | * |
| 232 | ******************************************************************************/ |
| 233 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 234 | acpi_status acpi_ut_validate_buffer(struct acpi_buffer * buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | { |
| 236 | |
| 237 | /* Obviously, the structure pointer must be valid */ |
| 238 | |
| 239 | if (!buffer) { |
| 240 | return (AE_BAD_PARAMETER); |
| 241 | } |
| 242 | |
| 243 | /* Special semantics for the length */ |
| 244 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 245 | if ((buffer->length == ACPI_NO_BUFFER) || |
| 246 | (buffer->length == ACPI_ALLOCATE_BUFFER) || |
| 247 | (buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | return (AE_OK); |
| 249 | } |
| 250 | |
| 251 | /* Length is valid, the buffer pointer must be also */ |
| 252 | |
| 253 | if (!buffer->pointer) { |
| 254 | return (AE_BAD_PARAMETER); |
| 255 | } |
| 256 | |
| 257 | return (AE_OK); |
| 258 | } |
| 259 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | /******************************************************************************* |
| 261 | * |
| 262 | * FUNCTION: acpi_ut_initialize_buffer |
| 263 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 264 | * PARAMETERS: buffer - Buffer to be validated |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | * required_length - Length needed |
| 266 | * |
| 267 | * RETURN: Status |
| 268 | * |
| 269 | * DESCRIPTION: Validate that the buffer is of the required length or |
Bob Moore | 68e125c | 2008-09-27 11:34:48 +0800 | [diff] [blame] | 270 | * allocate a new buffer. Returned buffer is always zeroed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | * |
| 272 | ******************************************************************************/ |
| 273 | |
| 274 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 275 | acpi_ut_initialize_buffer(struct acpi_buffer * buffer, |
| 276 | acpi_size required_length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | { |
Bob Moore | 68e125c | 2008-09-27 11:34:48 +0800 | [diff] [blame] | 278 | acpi_size input_buffer_length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
Bob Moore | 3c7db22 | 2008-08-04 11:13:01 +0800 | [diff] [blame] | 280 | /* Parameter validation */ |
| 281 | |
| 282 | if (!buffer || !required_length) { |
| 283 | return (AE_BAD_PARAMETER); |
Ingo Molnar | f88133d | 2008-07-21 15:57:45 +0200 | [diff] [blame] | 284 | } |
Bob Moore | 3c7db22 | 2008-08-04 11:13:01 +0800 | [diff] [blame] | 285 | |
Bob Moore | 68e125c | 2008-09-27 11:34:48 +0800 | [diff] [blame] | 286 | /* |
| 287 | * Buffer->Length is used as both an input and output parameter. Get the |
| 288 | * input actual length and set the output required buffer length. |
| 289 | */ |
| 290 | input_buffer_length = buffer->length; |
| 291 | buffer->length = required_length; |
| 292 | |
| 293 | /* |
| 294 | * The input buffer length contains the actual buffer length, or the type |
| 295 | * of buffer to be allocated by this routine. |
| 296 | */ |
| 297 | switch (input_buffer_length) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | case ACPI_NO_BUFFER: |
| 299 | |
Bob Moore | 68e125c | 2008-09-27 11:34:48 +0800 | [diff] [blame] | 300 | /* Return the exception (and the required buffer length) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
Bob Moore | 68e125c | 2008-09-27 11:34:48 +0800 | [diff] [blame] | 302 | return (AE_BUFFER_OVERFLOW); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | case ACPI_ALLOCATE_BUFFER: |
| 305 | |
| 306 | /* Allocate a new buffer */ |
| 307 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 308 | buffer->pointer = acpi_os_allocate(required_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | break; |
| 310 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | case ACPI_ALLOCATE_LOCAL_BUFFER: |
| 312 | |
| 313 | /* Allocate a new buffer with local interface to allow tracking */ |
| 314 | |
Bob Moore | 68e125c | 2008-09-27 11:34:48 +0800 | [diff] [blame] | 315 | buffer->pointer = ACPI_ALLOCATE(required_length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | break; |
| 317 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | default: |
| 319 | |
| 320 | /* Existing buffer: Validate the size of the buffer */ |
| 321 | |
Bob Moore | 68e125c | 2008-09-27 11:34:48 +0800 | [diff] [blame] | 322 | if (input_buffer_length < required_length) { |
| 323 | return (AE_BUFFER_OVERFLOW); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | break; |
| 326 | } |
| 327 | |
Bob Moore | 68e125c | 2008-09-27 11:34:48 +0800 | [diff] [blame] | 328 | /* Validate allocation from above or input buffer pointer */ |
| 329 | |
| 330 | if (!buffer->pointer) { |
| 331 | return (AE_NO_MEMORY); |
| 332 | } |
| 333 | |
| 334 | /* Have a valid buffer, clear it */ |
| 335 | |
| 336 | ACPI_MEMSET(buffer->pointer, 0, required_length); |
| 337 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | } |