| // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
| /****************************************************************************** |
| * |
| * Module Name: utalloc - local memory allocation routines |
| * |
| * Copyright (C) 2000 - 2018, 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); |
| } |