// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: utalloc - local memory allocation routines
*
* Copyright (C) 2000 - 2023, Intel Corp.
*
*****************************************************************************/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acdebug.h"
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME("utalloc")
#if !defined (USE_NATIVE_ALLOCATE_ZEROED)
/*******************************************************************************
*
* FUNCTION: acpi_os_allocate_zeroed
*
* PARAMETERS: size - Size of the allocation
*
* RETURN: Address of the allocated memory on success, NULL on failure.
*
* DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory.
* This is the default implementation. Can be overridden via the
* USE_NATIVE_ALLOCATE_ZEROED flag.
*
******************************************************************************/
void *acpi_os_allocate_zeroed(acpi_size size)
{
void *allocation;
ACPI_FUNCTION_ENTRY();
allocation = acpi_os_allocate(size);
if (allocation) {
/* Clear the memory block */
memset(allocation, 0, size);
}
return (allocation);
}
#endif /* !USE_NATIVE_ALLOCATE_ZEROED */
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_caches
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Create all local caches
*
******************************************************************************/
acpi_status acpi_ut_create_caches(void)
{
acpi_status status;
/* Object Caches, for frequently used objects */
status =
acpi_os_create_cache("Acpi-Namespace",
sizeof(struct acpi_namespace_node),
ACPI_MAX_NAMESPACE_CACHE_DEPTH,
&acpi_gbl_namespace_cache);
if (ACPI_FAILURE(status)) {
return (status);
}
status =
acpi_os_create_cache("Acpi-State", sizeof(union acpi_generic_state),
ACPI_MAX_STATE_CACHE_DEPTH,
&acpi_gbl_state_cache);
if (ACPI_FAILURE(status)) {
return (status);
}
status =
acpi_os_create_cache("Acpi-Parse",
sizeof(struct acpi_parse_obj_common),
ACPI_MAX_PARSE_CACHE_DEPTH,
&acpi_gbl_ps_node_cache);
if (ACPI_FAILURE(status)) {
return (status);
}
status =
acpi_os_create_cache("Acpi-ParseExt",
sizeof(struct acpi_parse_obj_named),
ACPI_MAX_EXTPARSE_CACHE_DEPTH,
&acpi_gbl_ps_node_ext_cache);
if (ACPI_FAILURE(status)) {
return (status);
}
status =
acpi_os_create_cache("Acpi-Operand",
sizeof(union acpi_operand_object),
ACPI_MAX_OBJECT_CACHE_DEPTH,
&acpi_gbl_operand_cache);
if (ACPI_FAILURE(status)) {
return (status);
}
#ifdef ACPI_ASL_COMPILER
/*
* For use with the ASL-/ASL+ option. This cache keeps track of regular
* 0xA9 0x01 comments.
*/
status =
acpi_os_create_cache("Acpi-Comment",
sizeof(struct acpi_comment_node),
ACPI_MAX_COMMENT_CACHE_DEPTH,
&acpi_gbl_reg_comment_cache);
if (ACPI_FAILURE(status)) {
return (status);
}
/*
* This cache keeps track of the starting addresses of where the comments
* lie. This helps prevent duplication of comments.
*/
status =
acpi_os_create_cache("Acpi-Comment-Addr",
sizeof(struct acpi_comment_addr_node),
ACPI_MAX_COMMENT_CACHE_DEPTH,
&acpi_gbl_comment_addr_cache);
if (ACPI_FAILURE(status)) {
return (status);
}
/*
* This cache will be used for nodes that represent files.
*/
status =
acpi_os_create_cache("Acpi-File", sizeof(struct acpi_file_node),
ACPI_MAX_COMMENT_CACHE_DEPTH,
&acpi_gbl_file_cache);
if (ACPI_FAILURE(status)) {
return (status);
}
#endif
#ifdef ACPI_DBG_TRACK_ALLOCATIONS
/* Memory allocation lists */
status = acpi_ut_create_list("Acpi-Global", 0, &acpi_gbl_global_list);
if (ACPI_FAILURE(status)) {
return (status);
}
status =
acpi_ut_create_list("Acpi-Namespace",
sizeof(struct acpi_namespace_node),
&acpi_gbl_ns_node_list);
if (ACPI_FAILURE(status)) {
return (status);
}
#endif
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_delete_caches
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Purge and delete all local caches
*
******************************************************************************/
acpi_status acpi_ut_delete_caches(void)
{
#ifdef ACPI_DBG_TRACK_ALLOCATIONS
char buffer[7];
if (acpi_gbl_display_final_mem_stats) {
strcpy(buffer, "MEMORY");
(void)acpi_db_display_statistics(buffer);
}
#endif
(void)acpi_os_delete_cache(acpi_gbl_namespace_cache);
acpi_gbl_namespace_cache = NULL;
(void)acpi_os_delete_cache(acpi_gbl_state_cache);
acpi_gbl_state_cache = NULL;
(void)acpi_os_delete_cache(acpi_gbl_operand_cache);
acpi_gbl_operand_cache = NULL;
(void)acpi_os_delete_cache(acpi_gbl_ps_node_cache);
acpi_gbl_ps_node_cache = NULL;
(void)acpi_os_delete_cache(acpi_gbl_ps_node_ext_cache);
acpi_gbl_ps_node_ext_cache = NULL;
#ifdef ACPI_ASL_COMPILER
(void)acpi_os_delete_cache(acpi_gbl_reg_comment_cache);
acpi_gbl_reg_comment_cache = NULL;
(void)acpi_os_delete_cache(acpi_gbl_comment_addr_cache);
acpi_gbl_comment_addr_cache = NULL;
(void)acpi_os_delete_cache(acpi_gbl_file_cache);
acpi_gbl_file_cache = NULL;
#endif
#ifdef ACPI_DBG_TRACK_ALLOCATIONS
/* Debug only - display leftover memory allocation, if any */
acpi_ut_dump_allocations(ACPI_UINT32_MAX, NULL);
/* Free memory lists */
acpi_os_free(acpi_gbl_global_list);
acpi_gbl_global_list = NULL;
acpi_os_free(acpi_gbl_ns_node_list);
acpi_gbl_ns_node_list = NULL;
#endif
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_validate_buffer
*
* PARAMETERS: buffer - Buffer descriptor to be validated
*
* RETURN: Status
*
* DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer
*
******************************************************************************/
acpi_status acpi_ut_validate_buffer(struct acpi_buffer *buffer)
{
/* Obviously, the structure pointer must be valid */
if (!buffer) {
return (AE_BAD_PARAMETER);
}
/* Special semantics for the length */
if ((buffer->length == ACPI_NO_BUFFER) ||
(buffer->length == ACPI_ALLOCATE_BUFFER) ||
(buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) {
return (AE_OK);
}
/* Length is valid, the buffer pointer must be also */
if (!buffer->pointer) {
return (AE_BAD_PARAMETER);
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_initialize_buffer
*
* PARAMETERS: buffer - Buffer to be validated
* required_length - Length needed
*
* RETURN: Status
*
* DESCRIPTION: Validate that the buffer is of the required length or
* allocate a new buffer. Returned buffer is always zeroed.
*
******************************************************************************/
acpi_status
acpi_ut_initialize_buffer(struct acpi_buffer *buffer, acpi_size required_length)
{
acpi_size input_buffer_length;
/* Parameter validation */
if (!buffer || !required_length) {
return (AE_BAD_PARAMETER);
}
/*
* Buffer->Length is used as both an input and output parameter. Get the
* input actual length and set the output required buffer length.
*/
input_buffer_length = buffer->length;
buffer->length = required_length;
/*
* The input buffer length contains the actual buffer length, or the type
* of buffer to be allocated by this routine.
*/
switch (input_buffer_length) {
case ACPI_NO_BUFFER:
/* Return the exception (and the required buffer length) */
return (AE_BUFFER_OVERFLOW);
case ACPI_ALLOCATE_BUFFER:
/*
* Allocate a new buffer. We directectly call acpi_os_allocate here to
* purposefully bypass the (optionally enabled) internal allocation
* tracking mechanism since we only want to track internal
* allocations. Note: The caller should use acpi_os_free to free this
* buffer created via ACPI_ALLOCATE_BUFFER.
*/
buffer->pointer = acpi_os_allocate(required_length);
break;
case ACPI_ALLOCATE_LOCAL_BUFFER:
/* Allocate a new buffer with local interface to allow tracking */
buffer->pointer = ACPI_ALLOCATE(required_length);
break;
default:
/* Existing buffer: Validate the size of the buffer */
if (input_buffer_length < required_length) {
return (AE_BUFFER_OVERFLOW);
}
break;
}
/* Validate allocation from above or input buffer pointer */
if (!buffer->pointer) {
return (AE_NO_MEMORY);
}
/* Have a valid buffer, clear it */
memset(buffer->pointer, 0, required_length);
return (AE_OK);
}
