358 lines
8.7 KiB
C
358 lines
8.7 KiB
C
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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: utalloc - local memory allocation routines
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*
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* Copyright (C) 2000 - 2019, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acdebug.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME("utalloc")
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#if !defined (USE_NATIVE_ALLOCATE_ZEROED)
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/*******************************************************************************
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*
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* FUNCTION: acpi_os_allocate_zeroed
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*
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* PARAMETERS: size - Size of the allocation
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*
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* RETURN: Address of the allocated memory on success, NULL on failure.
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*
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* DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory.
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* This is the default implementation. Can be overridden via the
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* USE_NATIVE_ALLOCATE_ZEROED flag.
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*
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******************************************************************************/
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void *acpi_os_allocate_zeroed(acpi_size size)
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{
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void *allocation;
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ACPI_FUNCTION_ENTRY();
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allocation = acpi_os_allocate(size);
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if (allocation) {
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/* Clear the memory block */
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memset(allocation, 0, size);
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}
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return (allocation);
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}
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#endif /* !USE_NATIVE_ALLOCATE_ZEROED */
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_create_caches
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create all local caches
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*
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******************************************************************************/
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acpi_status acpi_ut_create_caches(void)
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{
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acpi_status status;
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/* Object Caches, for frequently used objects */
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status =
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acpi_os_create_cache("Acpi-Namespace",
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sizeof(struct acpi_namespace_node),
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ACPI_MAX_NAMESPACE_CACHE_DEPTH,
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&acpi_gbl_namespace_cache);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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status =
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acpi_os_create_cache("Acpi-State", sizeof(union acpi_generic_state),
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ACPI_MAX_STATE_CACHE_DEPTH,
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&acpi_gbl_state_cache);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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status =
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acpi_os_create_cache("Acpi-Parse",
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sizeof(struct acpi_parse_obj_common),
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ACPI_MAX_PARSE_CACHE_DEPTH,
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&acpi_gbl_ps_node_cache);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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status =
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acpi_os_create_cache("Acpi-ParseExt",
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sizeof(struct acpi_parse_obj_named),
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ACPI_MAX_EXTPARSE_CACHE_DEPTH,
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&acpi_gbl_ps_node_ext_cache);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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status =
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acpi_os_create_cache("Acpi-Operand",
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sizeof(union acpi_operand_object),
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ACPI_MAX_OBJECT_CACHE_DEPTH,
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&acpi_gbl_operand_cache);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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#ifdef ACPI_ASL_COMPILER
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/*
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* For use with the ASL-/ASL+ option. This cache keeps track of regular
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* 0xA9 0x01 comments.
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*/
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status =
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acpi_os_create_cache("Acpi-Comment",
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sizeof(struct acpi_comment_node),
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ACPI_MAX_COMMENT_CACHE_DEPTH,
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&acpi_gbl_reg_comment_cache);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/*
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* This cache keeps track of the starting addresses of where the comments
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* lie. This helps prevent duplication of comments.
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*/
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status =
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acpi_os_create_cache("Acpi-Comment-Addr",
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sizeof(struct acpi_comment_addr_node),
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ACPI_MAX_COMMENT_CACHE_DEPTH,
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&acpi_gbl_comment_addr_cache);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/*
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* This cache will be used for nodes that represent files.
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*/
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status =
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acpi_os_create_cache("Acpi-File", sizeof(struct acpi_file_node),
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ACPI_MAX_COMMENT_CACHE_DEPTH,
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&acpi_gbl_file_cache);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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#endif
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#ifdef ACPI_DBG_TRACK_ALLOCATIONS
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/* Memory allocation lists */
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status = acpi_ut_create_list("Acpi-Global", 0, &acpi_gbl_global_list);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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status =
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acpi_ut_create_list("Acpi-Namespace",
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sizeof(struct acpi_namespace_node),
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&acpi_gbl_ns_node_list);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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#endif
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_delete_caches
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Purge and delete all local caches
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*
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******************************************************************************/
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acpi_status acpi_ut_delete_caches(void)
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{
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#ifdef ACPI_DBG_TRACK_ALLOCATIONS
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char buffer[7];
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if (acpi_gbl_display_final_mem_stats) {
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strcpy(buffer, "MEMORY");
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(void)acpi_db_display_statistics(buffer);
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}
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#endif
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(void)acpi_os_delete_cache(acpi_gbl_namespace_cache);
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acpi_gbl_namespace_cache = NULL;
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(void)acpi_os_delete_cache(acpi_gbl_state_cache);
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acpi_gbl_state_cache = NULL;
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(void)acpi_os_delete_cache(acpi_gbl_operand_cache);
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acpi_gbl_operand_cache = NULL;
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(void)acpi_os_delete_cache(acpi_gbl_ps_node_cache);
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acpi_gbl_ps_node_cache = NULL;
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(void)acpi_os_delete_cache(acpi_gbl_ps_node_ext_cache);
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acpi_gbl_ps_node_ext_cache = NULL;
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#ifdef ACPI_ASL_COMPILER
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(void)acpi_os_delete_cache(acpi_gbl_reg_comment_cache);
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acpi_gbl_reg_comment_cache = NULL;
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(void)acpi_os_delete_cache(acpi_gbl_comment_addr_cache);
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acpi_gbl_comment_addr_cache = NULL;
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(void)acpi_os_delete_cache(acpi_gbl_file_cache);
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acpi_gbl_file_cache = NULL;
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#endif
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#ifdef ACPI_DBG_TRACK_ALLOCATIONS
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/* Debug only - display leftover memory allocation, if any */
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acpi_ut_dump_allocations(ACPI_UINT32_MAX, NULL);
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/* Free memory lists */
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acpi_os_free(acpi_gbl_global_list);
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acpi_gbl_global_list = NULL;
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acpi_os_free(acpi_gbl_ns_node_list);
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acpi_gbl_ns_node_list = NULL;
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#endif
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_validate_buffer
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*
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* PARAMETERS: buffer - Buffer descriptor to be validated
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*
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* RETURN: Status
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*
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* DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer
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*
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******************************************************************************/
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acpi_status acpi_ut_validate_buffer(struct acpi_buffer *buffer)
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{
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/* Obviously, the structure pointer must be valid */
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if (!buffer) {
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return (AE_BAD_PARAMETER);
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}
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/* Special semantics for the length */
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if ((buffer->length == ACPI_NO_BUFFER) ||
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(buffer->length == ACPI_ALLOCATE_BUFFER) ||
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(buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) {
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return (AE_OK);
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}
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/* Length is valid, the buffer pointer must be also */
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if (!buffer->pointer) {
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return (AE_BAD_PARAMETER);
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_initialize_buffer
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*
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* PARAMETERS: buffer - Buffer to be validated
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* required_length - Length needed
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*
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* RETURN: Status
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*
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* DESCRIPTION: Validate that the buffer is of the required length or
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* allocate a new buffer. Returned buffer is always zeroed.
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*
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******************************************************************************/
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acpi_status
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acpi_ut_initialize_buffer(struct acpi_buffer *buffer, acpi_size required_length)
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{
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acpi_size input_buffer_length;
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/* Parameter validation */
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if (!buffer || !required_length) {
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return (AE_BAD_PARAMETER);
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}
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/*
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* Buffer->Length is used as both an input and output parameter. Get the
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* input actual length and set the output required buffer length.
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*/
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input_buffer_length = buffer->length;
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buffer->length = required_length;
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/*
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* The input buffer length contains the actual buffer length, or the type
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* of buffer to be allocated by this routine.
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*/
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switch (input_buffer_length) {
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case ACPI_NO_BUFFER:
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/* Return the exception (and the required buffer length) */
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return (AE_BUFFER_OVERFLOW);
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case ACPI_ALLOCATE_BUFFER:
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/*
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* Allocate a new buffer. We directectly call acpi_os_allocate here to
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* purposefully bypass the (optionally enabled) internal allocation
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* tracking mechanism since we only want to track internal
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* allocations. Note: The caller should use acpi_os_free to free this
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* buffer created via ACPI_ALLOCATE_BUFFER.
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*/
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buffer->pointer = acpi_os_allocate(required_length);
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break;
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case ACPI_ALLOCATE_LOCAL_BUFFER:
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/* Allocate a new buffer with local interface to allow tracking */
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buffer->pointer = ACPI_ALLOCATE(required_length);
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break;
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default:
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/* Existing buffer: Validate the size of the buffer */
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if (input_buffer_length < required_length) {
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return (AE_BUFFER_OVERFLOW);
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}
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break;
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}
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/* Validate allocation from above or input buffer pointer */
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if (!buffer->pointer) {
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return (AE_NO_MEMORY);
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}
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/* Have a valid buffer, clear it */
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memset(buffer->pointer, 0, required_length);
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return (AE_OK);
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}
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