1 /****************************************************************************** 2 * 3 * Module Name: utalloc - local memory allocation routines 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2012, Intel Corp. 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 44 #include <acpi/acpi.h> 45 #include "accommon.h" 46 #include "acdebug.h" 47 48 #define _COMPONENT ACPI_UTILITIES 49 ACPI_MODULE_NAME("utalloc") 50 51 /******************************************************************************* 52 * 53 * FUNCTION: acpi_ut_create_caches 54 * 55 * PARAMETERS: None 56 * 57 * RETURN: Status 58 * 59 * DESCRIPTION: Create all local caches 60 * 61 ******************************************************************************/ 62 acpi_status acpi_ut_create_caches(void) 63 { 64 acpi_status status; 65 66 /* Object Caches, for frequently used objects */ 67 68 status = 69 acpi_os_create_cache("Acpi-Namespace", 70 sizeof(struct acpi_namespace_node), 71 ACPI_MAX_NAMESPACE_CACHE_DEPTH, 72 &acpi_gbl_namespace_cache); 73 if (ACPI_FAILURE(status)) { 74 return (status); 75 } 76 77 status = 78 acpi_os_create_cache("Acpi-State", sizeof(union acpi_generic_state), 79 ACPI_MAX_STATE_CACHE_DEPTH, 80 &acpi_gbl_state_cache); 81 if (ACPI_FAILURE(status)) { 82 return (status); 83 } 84 85 status = 86 acpi_os_create_cache("Acpi-Parse", 87 sizeof(struct acpi_parse_obj_common), 88 ACPI_MAX_PARSE_CACHE_DEPTH, 89 &acpi_gbl_ps_node_cache); 90 if (ACPI_FAILURE(status)) { 91 return (status); 92 } 93 94 status = 95 acpi_os_create_cache("Acpi-ParseExt", 96 sizeof(struct acpi_parse_obj_named), 97 ACPI_MAX_EXTPARSE_CACHE_DEPTH, 98 &acpi_gbl_ps_node_ext_cache); 99 if (ACPI_FAILURE(status)) { 100 return (status); 101 } 102 103 status = 104 acpi_os_create_cache("Acpi-Operand", 105 sizeof(union acpi_operand_object), 106 ACPI_MAX_OBJECT_CACHE_DEPTH, 107 &acpi_gbl_operand_cache); 108 if (ACPI_FAILURE(status)) { 109 return (status); 110 } 111 #ifdef ACPI_DBG_TRACK_ALLOCATIONS 112 113 /* Memory allocation lists */ 114 115 status = acpi_ut_create_list("Acpi-Global", 0, &acpi_gbl_global_list); 116 if (ACPI_FAILURE(status)) { 117 return (status); 118 } 119 120 status = 121 acpi_ut_create_list("Acpi-Namespace", 122 sizeof(struct acpi_namespace_node), 123 &acpi_gbl_ns_node_list); 124 if (ACPI_FAILURE(status)) { 125 return (status); 126 } 127 #endif 128 129 return (AE_OK); 130 } 131 132 /******************************************************************************* 133 * 134 * FUNCTION: acpi_ut_delete_caches 135 * 136 * PARAMETERS: None 137 * 138 * RETURN: Status 139 * 140 * DESCRIPTION: Purge and delete all local caches 141 * 142 ******************************************************************************/ 143 144 acpi_status acpi_ut_delete_caches(void) 145 { 146 #ifdef ACPI_DBG_TRACK_ALLOCATIONS 147 char buffer[7]; 148 149 if (acpi_gbl_display_final_mem_stats) { 150 ACPI_STRCPY(buffer, "MEMORY"); 151 (void)acpi_db_display_statistics(buffer); 152 } 153 #endif 154 155 (void)acpi_os_delete_cache(acpi_gbl_namespace_cache); 156 acpi_gbl_namespace_cache = NULL; 157 158 (void)acpi_os_delete_cache(acpi_gbl_state_cache); 159 acpi_gbl_state_cache = NULL; 160 161 (void)acpi_os_delete_cache(acpi_gbl_operand_cache); 162 acpi_gbl_operand_cache = NULL; 163 164 (void)acpi_os_delete_cache(acpi_gbl_ps_node_cache); 165 acpi_gbl_ps_node_cache = NULL; 166 167 (void)acpi_os_delete_cache(acpi_gbl_ps_node_ext_cache); 168 acpi_gbl_ps_node_ext_cache = NULL; 169 170 #ifdef ACPI_DBG_TRACK_ALLOCATIONS 171 172 /* Debug only - display leftover memory allocation, if any */ 173 174 acpi_ut_dump_allocations(ACPI_UINT32_MAX, NULL); 175 176 /* Free memory lists */ 177 178 ACPI_FREE(acpi_gbl_global_list); 179 acpi_gbl_global_list = NULL; 180 181 ACPI_FREE(acpi_gbl_ns_node_list); 182 acpi_gbl_ns_node_list = NULL; 183 #endif 184 185 return (AE_OK); 186 } 187 188 /******************************************************************************* 189 * 190 * FUNCTION: acpi_ut_validate_buffer 191 * 192 * PARAMETERS: buffer - Buffer descriptor to be validated 193 * 194 * RETURN: Status 195 * 196 * DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer 197 * 198 ******************************************************************************/ 199 200 acpi_status acpi_ut_validate_buffer(struct acpi_buffer * buffer) 201 { 202 203 /* Obviously, the structure pointer must be valid */ 204 205 if (!buffer) { 206 return (AE_BAD_PARAMETER); 207 } 208 209 /* Special semantics for the length */ 210 211 if ((buffer->length == ACPI_NO_BUFFER) || 212 (buffer->length == ACPI_ALLOCATE_BUFFER) || 213 (buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) { 214 return (AE_OK); 215 } 216 217 /* Length is valid, the buffer pointer must be also */ 218 219 if (!buffer->pointer) { 220 return (AE_BAD_PARAMETER); 221 } 222 223 return (AE_OK); 224 } 225 226 /******************************************************************************* 227 * 228 * FUNCTION: acpi_ut_initialize_buffer 229 * 230 * PARAMETERS: buffer - Buffer to be validated 231 * required_length - Length needed 232 * 233 * RETURN: Status 234 * 235 * DESCRIPTION: Validate that the buffer is of the required length or 236 * allocate a new buffer. Returned buffer is always zeroed. 237 * 238 ******************************************************************************/ 239 240 acpi_status 241 acpi_ut_initialize_buffer(struct acpi_buffer * buffer, 242 acpi_size required_length) 243 { 244 acpi_size input_buffer_length; 245 246 /* Parameter validation */ 247 248 if (!buffer || !required_length) { 249 return (AE_BAD_PARAMETER); 250 } 251 252 /* 253 * Buffer->Length is used as both an input and output parameter. Get the 254 * input actual length and set the output required buffer length. 255 */ 256 input_buffer_length = buffer->length; 257 buffer->length = required_length; 258 259 /* 260 * The input buffer length contains the actual buffer length, or the type 261 * of buffer to be allocated by this routine. 262 */ 263 switch (input_buffer_length) { 264 case ACPI_NO_BUFFER: 265 266 /* Return the exception (and the required buffer length) */ 267 268 return (AE_BUFFER_OVERFLOW); 269 270 case ACPI_ALLOCATE_BUFFER: 271 272 /* Allocate a new buffer */ 273 274 buffer->pointer = acpi_os_allocate(required_length); 275 break; 276 277 case ACPI_ALLOCATE_LOCAL_BUFFER: 278 279 /* Allocate a new buffer with local interface to allow tracking */ 280 281 buffer->pointer = ACPI_ALLOCATE(required_length); 282 break; 283 284 default: 285 286 /* Existing buffer: Validate the size of the buffer */ 287 288 if (input_buffer_length < required_length) { 289 return (AE_BUFFER_OVERFLOW); 290 } 291 break; 292 } 293 294 /* Validate allocation from above or input buffer pointer */ 295 296 if (!buffer->pointer) { 297 return (AE_NO_MEMORY); 298 } 299 300 /* Have a valid buffer, clear it */ 301 302 ACPI_MEMSET(buffer->pointer, 0, required_length); 303 return (AE_OK); 304 } 305 306 #ifdef NOT_USED_BY_LINUX 307 /******************************************************************************* 308 * 309 * FUNCTION: acpi_ut_allocate 310 * 311 * PARAMETERS: size - Size of the allocation 312 * component - Component type of caller 313 * module - Source file name of caller 314 * line - Line number of caller 315 * 316 * RETURN: Address of the allocated memory on success, NULL on failure. 317 * 318 * DESCRIPTION: Subsystem equivalent of malloc. 319 * 320 ******************************************************************************/ 321 322 void *acpi_ut_allocate(acpi_size size, 323 u32 component, const char *module, u32 line) 324 { 325 void *allocation; 326 327 ACPI_FUNCTION_TRACE_U32(ut_allocate, size); 328 329 /* Check for an inadvertent size of zero bytes */ 330 331 if (!size) { 332 ACPI_WARNING((module, line, 333 "Attempt to allocate zero bytes, allocating 1 byte")); 334 size = 1; 335 } 336 337 allocation = acpi_os_allocate(size); 338 if (!allocation) { 339 340 /* Report allocation error */ 341 342 ACPI_WARNING((module, line, 343 "Could not allocate size %u", (u32) size)); 344 345 return_PTR(NULL); 346 } 347 348 return_PTR(allocation); 349 } 350 351 /******************************************************************************* 352 * 353 * FUNCTION: acpi_ut_allocate_zeroed 354 * 355 * PARAMETERS: size - Size of the allocation 356 * component - Component type of caller 357 * module - Source file name of caller 358 * line - Line number of caller 359 * 360 * RETURN: Address of the allocated memory on success, NULL on failure. 361 * 362 * DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory. 363 * 364 ******************************************************************************/ 365 366 void *acpi_ut_allocate_zeroed(acpi_size size, 367 u32 component, const char *module, u32 line) 368 { 369 void *allocation; 370 371 ACPI_FUNCTION_ENTRY(); 372 373 allocation = acpi_ut_allocate(size, component, module, line); 374 if (allocation) { 375 376 /* Clear the memory block */ 377 378 ACPI_MEMSET(allocation, 0, size); 379 } 380 381 return (allocation); 382 } 383 #endif 384