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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [acpi/] [utilities/] [utalloc.c] - Rev 1765
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/****************************************************************************** * * Module Name: utalloc - local cache and memory allocation routines * *****************************************************************************/ /* * Copyright (C) 2000 - 2004, R. Byron Moore * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. */ #include <acpi/acpi.h> #define _COMPONENT ACPI_UTILITIES ACPI_MODULE_NAME ("utalloc") /****************************************************************************** * * FUNCTION: acpi_ut_release_to_cache * * PARAMETERS: list_id - Memory list/cache ID * Object - The object to be released * * RETURN: None * * DESCRIPTION: Release an object to the specified cache. If cache is full, * the object is deleted. * ******************************************************************************/ void acpi_ut_release_to_cache ( u32 list_id, void *object) { struct acpi_memory_list *cache_info; ACPI_FUNCTION_ENTRY (); /* If walk cache is full, just free this wallkstate object */ cache_info = &acpi_gbl_memory_lists[list_id]; if (cache_info->cache_depth >= cache_info->max_cache_depth) { ACPI_MEM_FREE (object); ACPI_MEM_TRACKING (cache_info->total_freed++); } /* Otherwise put this object back into the cache */ else { if (ACPI_FAILURE (acpi_ut_acquire_mutex (ACPI_MTX_CACHES))) { return; } /* Mark the object as cached */ ACPI_MEMSET (object, 0xCA, cache_info->object_size); ACPI_SET_DESCRIPTOR_TYPE (object, ACPI_DESC_TYPE_CACHED); /* Put the object at the head of the cache list */ * (ACPI_CAST_INDIRECT_PTR (char, &(((char *) object)[cache_info->link_offset]))) = cache_info->list_head; cache_info->list_head = object; cache_info->cache_depth++; (void) acpi_ut_release_mutex (ACPI_MTX_CACHES); } } /****************************************************************************** * * FUNCTION: acpi_ut_acquire_from_cache * * PARAMETERS: list_id - Memory list ID * * RETURN: A requested object. NULL if the object could not be * allocated. * * DESCRIPTION: Get an object from the specified cache. If cache is empty, * the object is allocated. * ******************************************************************************/ void * acpi_ut_acquire_from_cache ( u32 list_id) { struct acpi_memory_list *cache_info; void *object; ACPI_FUNCTION_NAME ("ut_acquire_from_cache"); cache_info = &acpi_gbl_memory_lists[list_id]; if (ACPI_FAILURE (acpi_ut_acquire_mutex (ACPI_MTX_CACHES))) { return (NULL); } ACPI_MEM_TRACKING (cache_info->cache_requests++); /* Check the cache first */ if (cache_info->list_head) { /* There is an object available, use it */ object = cache_info->list_head; cache_info->list_head = *(ACPI_CAST_INDIRECT_PTR (char, &(((char *) object)[cache_info->link_offset]))); ACPI_MEM_TRACKING (cache_info->cache_hits++); cache_info->cache_depth--; #ifdef ACPI_DBG_TRACK_ALLOCATIONS ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Object %p from %s\n", object, acpi_gbl_memory_lists[list_id].list_name)); #endif if (ACPI_FAILURE (acpi_ut_release_mutex (ACPI_MTX_CACHES))) { return (NULL); } /* Clear (zero) the previously used Object */ ACPI_MEMSET (object, 0, cache_info->object_size); } else { /* The cache is empty, create a new object */ /* Avoid deadlock with ACPI_MEM_CALLOCATE */ if (ACPI_FAILURE (acpi_ut_release_mutex (ACPI_MTX_CACHES))) { return (NULL); } object = ACPI_MEM_CALLOCATE (cache_info->object_size); ACPI_MEM_TRACKING (cache_info->total_allocated++); } return (object); } /****************************************************************************** * * FUNCTION: acpi_ut_delete_generic_cache * * PARAMETERS: list_id - Memory list ID * * RETURN: None * * DESCRIPTION: Free all objects within the requested cache. * ******************************************************************************/ void acpi_ut_delete_generic_cache ( u32 list_id) { struct acpi_memory_list *cache_info; char *next; ACPI_FUNCTION_ENTRY (); cache_info = &acpi_gbl_memory_lists[list_id]; while (cache_info->list_head) { /* Delete one cached state object */ next = *(ACPI_CAST_INDIRECT_PTR (char, &(((char *) cache_info->list_head)[cache_info->link_offset]))); ACPI_MEM_FREE (cache_info->list_head); cache_info->list_head = next; cache_info->cache_depth--; } } /******************************************************************************* * * 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: required_length - Length needed * Buffer - Buffer to be validated * * RETURN: Status * * DESCRIPTION: Validate that the buffer is of the required length or * allocate a new buffer. * ******************************************************************************/ acpi_status acpi_ut_initialize_buffer ( struct acpi_buffer *buffer, acpi_size required_length) { acpi_status status = AE_OK; switch (buffer->length) { case ACPI_NO_BUFFER: /* Set the exception and returned the required length */ status = AE_BUFFER_OVERFLOW; break; case ACPI_ALLOCATE_BUFFER: /* Allocate a new buffer */ buffer->pointer = acpi_os_allocate (required_length); if (!buffer->pointer) { return (AE_NO_MEMORY); } /* Clear the buffer */ ACPI_MEMSET (buffer->pointer, 0, required_length); break; case ACPI_ALLOCATE_LOCAL_BUFFER: /* Allocate a new buffer with local interface to allow tracking */ buffer->pointer = ACPI_MEM_ALLOCATE (required_length); if (!buffer->pointer) { return (AE_NO_MEMORY); } /* Clear the buffer */ ACPI_MEMSET (buffer->pointer, 0, required_length); break; default: /* Validate the size of the buffer */ if (buffer->length < required_length) { status = AE_BUFFER_OVERFLOW; } break; } buffer->length = required_length; return (status); } /******************************************************************************* * * FUNCTION: acpi_ut_allocate * * PARAMETERS: Size - Size of the allocation * Component - Component type of caller * Module - Source file name of caller * Line - Line number of caller * * RETURN: Address of the allocated memory on success, NULL on failure. * * DESCRIPTION: The subsystem's equivalent of malloc. * ******************************************************************************/ void * acpi_ut_allocate ( acpi_size size, u32 component, char *module, u32 line) { void *allocation; ACPI_FUNCTION_TRACE_U32 ("ut_allocate", size); /* Check for an inadvertent size of zero bytes */ if (!size) { _ACPI_REPORT_ERROR (module, line, component, ("ut_allocate: Attempt to allocate zero bytes\n")); size = 1; } allocation = acpi_os_allocate (size); if (!allocation) { /* Report allocation error */ _ACPI_REPORT_ERROR (module, line, component, ("ut_allocate: Could not allocate size %X\n", (u32) size)); return_PTR (NULL); } return_PTR (allocation); } /******************************************************************************* * * FUNCTION: acpi_ut_callocate * * PARAMETERS: Size - Size of the allocation * Component - Component type of caller * Module - Source file name of caller * Line - Line number of caller * * RETURN: Address of the allocated memory on success, NULL on failure. * * DESCRIPTION: Subsystem equivalent of calloc. * ******************************************************************************/ void * acpi_ut_callocate ( acpi_size size, u32 component, char *module, u32 line) { void *allocation; ACPI_FUNCTION_TRACE_U32 ("ut_callocate", size); /* Check for an inadvertent size of zero bytes */ if (!size) { _ACPI_REPORT_ERROR (module, line, component, ("ut_callocate: Attempt to allocate zero bytes\n")); return_PTR (NULL); } allocation = acpi_os_allocate (size); if (!allocation) { /* Report allocation error */ _ACPI_REPORT_ERROR (module, line, component, ("ut_callocate: Could not allocate size %X\n", (u32) size)); return_PTR (NULL); } /* Clear the memory block */ ACPI_MEMSET (allocation, 0, size); return_PTR (allocation); } #ifdef ACPI_DBG_TRACK_ALLOCATIONS /* * These procedures are used for tracking memory leaks in the subsystem, and * they get compiled out when the ACPI_DBG_TRACK_ALLOCATIONS is not set. * * Each memory allocation is tracked via a doubly linked list. Each * element contains the caller's component, module name, function name, and * line number. acpi_ut_allocate and acpi_ut_callocate call * acpi_ut_track_allocation to add an element to the list; deletion * occurs in the body of acpi_ut_free. */ /******************************************************************************* * * FUNCTION: acpi_ut_allocate_and_track * * PARAMETERS: Size - Size of the allocation * Component - Component type of caller * Module - Source file name of caller * Line - Line number of caller * * RETURN: Address of the allocated memory on success, NULL on failure. * * DESCRIPTION: The subsystem's equivalent of malloc. * ******************************************************************************/ void * acpi_ut_allocate_and_track ( acpi_size size, u32 component, char *module, u32 line) { struct acpi_debug_mem_block *allocation; acpi_status status; allocation = acpi_ut_allocate (size + sizeof (struct acpi_debug_mem_block), component, module, line); if (!allocation) { return (NULL); } status = acpi_ut_track_allocation (ACPI_MEM_LIST_GLOBAL, allocation, size, ACPI_MEM_MALLOC, component, module, line); if (ACPI_FAILURE (status)) { acpi_os_free (allocation); return (NULL); } acpi_gbl_memory_lists[ACPI_MEM_LIST_GLOBAL].total_allocated++; acpi_gbl_memory_lists[ACPI_MEM_LIST_GLOBAL].current_total_size += (u32) size; return ((void *) &allocation->user_space); } /******************************************************************************* * * FUNCTION: acpi_ut_callocate_and_track * * PARAMETERS: Size - Size of the allocation * Component - Component type of caller * Module - Source file name of caller * Line - Line number of caller * * RETURN: Address of the allocated memory on success, NULL on failure. * * DESCRIPTION: Subsystem equivalent of calloc. * ******************************************************************************/ void * acpi_ut_callocate_and_track ( acpi_size size, u32 component, char *module, u32 line) { struct acpi_debug_mem_block *allocation; acpi_status status; allocation = acpi_ut_callocate (size + sizeof (struct acpi_debug_mem_block), component, module, line); if (!allocation) { /* Report allocation error */ _ACPI_REPORT_ERROR (module, line, component, ("ut_callocate: Could not allocate size %X\n", (u32) size)); return (NULL); } status = acpi_ut_track_allocation (ACPI_MEM_LIST_GLOBAL, allocation, size, ACPI_MEM_CALLOC, component, module, line); if (ACPI_FAILURE (status)) { acpi_os_free (allocation); return (NULL); } acpi_gbl_memory_lists[ACPI_MEM_LIST_GLOBAL].total_allocated++; acpi_gbl_memory_lists[ACPI_MEM_LIST_GLOBAL].current_total_size += (u32) size; return ((void *) &allocation->user_space); } /******************************************************************************* * * FUNCTION: acpi_ut_free_and_track * * PARAMETERS: Allocation - Address of the memory to deallocate * Component - Component type of caller * Module - Source file name of caller * Line - Line number of caller * * RETURN: None * * DESCRIPTION: Frees the memory at Allocation * ******************************************************************************/ void acpi_ut_free_and_track ( void *allocation, u32 component, char *module, u32 line) { struct acpi_debug_mem_block *debug_block; acpi_status status; ACPI_FUNCTION_TRACE_PTR ("ut_free", allocation); if (NULL == allocation) { _ACPI_REPORT_ERROR (module, line, component, ("acpi_ut_free: Attempt to delete a NULL address\n")); return_VOID; } debug_block = ACPI_CAST_PTR (struct acpi_debug_mem_block, (((char *) allocation) - sizeof (struct acpi_debug_mem_header))); acpi_gbl_memory_lists[ACPI_MEM_LIST_GLOBAL].total_freed++; acpi_gbl_memory_lists[ACPI_MEM_LIST_GLOBAL].current_total_size -= debug_block->size; status = acpi_ut_remove_allocation (ACPI_MEM_LIST_GLOBAL, debug_block, component, module, line); if (ACPI_FAILURE (status)) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not free memory, %s\n", acpi_format_exception (status))); } acpi_os_free (debug_block); ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "%p freed\n", allocation)); return_VOID; } /******************************************************************************* * * FUNCTION: acpi_ut_find_allocation * * PARAMETERS: Allocation - Address of allocated memory * * RETURN: A list element if found; NULL otherwise. * * DESCRIPTION: Searches for an element in the global allocation tracking list. * ******************************************************************************/ struct acpi_debug_mem_block * acpi_ut_find_allocation ( u32 list_id, void *allocation) { struct acpi_debug_mem_block *element; ACPI_FUNCTION_ENTRY (); if (list_id > ACPI_MEM_LIST_MAX) { return (NULL); } element = acpi_gbl_memory_lists[list_id].list_head; /* Search for the address. */ while (element) { if (element == allocation) { return (element); } element = element->next; } return (NULL); } /******************************************************************************* * * FUNCTION: acpi_ut_track_allocation * * PARAMETERS: Allocation - Address of allocated memory * Size - Size of the allocation * alloc_type - MEM_MALLOC or MEM_CALLOC * Component - Component type of caller * Module - Source file name of caller * Line - Line number of caller * * RETURN: None. * * DESCRIPTION: Inserts an element into the global allocation tracking list. * ******************************************************************************/ acpi_status acpi_ut_track_allocation ( u32 list_id, struct acpi_debug_mem_block *allocation, acpi_size size, u8 alloc_type, u32 component, char *module, u32 line) { struct acpi_memory_list *mem_list; struct acpi_debug_mem_block *element; acpi_status status = AE_OK; ACPI_FUNCTION_TRACE_PTR ("ut_track_allocation", allocation); if (list_id > ACPI_MEM_LIST_MAX) { return_ACPI_STATUS (AE_BAD_PARAMETER); } mem_list = &acpi_gbl_memory_lists[list_id]; status = acpi_ut_acquire_mutex (ACPI_MTX_MEMORY); if (ACPI_FAILURE (status)) { return_ACPI_STATUS (status); } /* * Search list for this address to make sure it is not already on the list. * This will catch several kinds of problems. */ element = acpi_ut_find_allocation (list_id, allocation); if (element) { ACPI_REPORT_ERROR (("ut_track_allocation: Allocation already present in list! (%p)\n", allocation)); ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Element %p Address %p\n", element, allocation)); goto unlock_and_exit; } /* Fill in the instance data. */ allocation->size = (u32) size; allocation->alloc_type = alloc_type; allocation->component = component; allocation->line = line; ACPI_STRNCPY (allocation->module, module, ACPI_MAX_MODULE_NAME); /* Insert at list head */ if (mem_list->list_head) { ((struct acpi_debug_mem_block *)(mem_list->list_head))->previous = allocation; } allocation->next = mem_list->list_head; allocation->previous = NULL; mem_list->list_head = allocation; unlock_and_exit: status = acpi_ut_release_mutex (ACPI_MTX_MEMORY); return_ACPI_STATUS (status); } /******************************************************************************* * * FUNCTION: acpi_ut_remove_allocation * * PARAMETERS: Allocation - Address of allocated memory * Component - Component type of caller * Module - Source file name of caller * Line - Line number of caller * * RETURN: * * DESCRIPTION: Deletes an element from the global allocation tracking list. * ******************************************************************************/ acpi_status acpi_ut_remove_allocation ( u32 list_id, struct acpi_debug_mem_block *allocation, u32 component, char *module, u32 line) { struct acpi_memory_list *mem_list; acpi_status status; ACPI_FUNCTION_TRACE ("ut_remove_allocation"); if (list_id > ACPI_MEM_LIST_MAX) { return_ACPI_STATUS (AE_BAD_PARAMETER); } mem_list = &acpi_gbl_memory_lists[list_id]; if (NULL == mem_list->list_head) { /* No allocations! */ _ACPI_REPORT_ERROR (module, line, component, ("ut_remove_allocation: Empty allocation list, nothing to free!\n")); return_ACPI_STATUS (AE_OK); } status = acpi_ut_acquire_mutex (ACPI_MTX_MEMORY); if (ACPI_FAILURE (status)) { return_ACPI_STATUS (status); } /* Unlink */ if (allocation->previous) { (allocation->previous)->next = allocation->next; } else { mem_list->list_head = allocation->next; } if (allocation->next) { (allocation->next)->previous = allocation->previous; } /* Mark the segment as deleted */ ACPI_MEMSET (&allocation->user_space, 0xEA, allocation->size); ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Freeing size 0%X\n", allocation->size)); status = acpi_ut_release_mutex (ACPI_MTX_MEMORY); return_ACPI_STATUS (status); } /******************************************************************************* * * FUNCTION: acpi_ut_dump_allocation_info * * PARAMETERS: * * RETURN: None * * DESCRIPTION: Print some info about the outstanding allocations. * ******************************************************************************/ void acpi_ut_dump_allocation_info ( void) { /* struct acpi_memory_list *mem_list; */ ACPI_FUNCTION_TRACE ("ut_dump_allocation_info"); /* ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES, ("%30s: %4d (%3d Kb)\n", "Current allocations", mem_list->current_count, ROUND_UP_TO_1K (mem_list->current_size))); ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES, ("%30s: %4d (%3d Kb)\n", "Max concurrent allocations", mem_list->max_concurrent_count, ROUND_UP_TO_1K (mem_list->max_concurrent_size))); ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES, ("%30s: %4d (%3d Kb)\n", "Total (all) internal objects", running_object_count, ROUND_UP_TO_1K (running_object_size))); ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES, ("%30s: %4d (%3d Kb)\n", "Total (all) allocations", running_alloc_count, ROUND_UP_TO_1K (running_alloc_size))); ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES, ("%30s: %4d (%3d Kb)\n", "Current Nodes", acpi_gbl_current_node_count, ROUND_UP_TO_1K (acpi_gbl_current_node_size))); ACPI_DEBUG_PRINT (TRACE_ALLOCATIONS | TRACE_TABLES, ("%30s: %4d (%3d Kb)\n", "Max Nodes", acpi_gbl_max_concurrent_node_count, ROUND_UP_TO_1K ((acpi_gbl_max_concurrent_node_count * sizeof (struct acpi_namespace_node))))); */ return_VOID; } /******************************************************************************* * * FUNCTION: acpi_ut_dump_allocations * * PARAMETERS: Component - Component(s) to dump info for. * Module - Module to dump info for. NULL means all. * * RETURN: None * * DESCRIPTION: Print a list of all outstanding allocations. * ******************************************************************************/ void acpi_ut_dump_allocations ( u32 component, char *module) { struct acpi_debug_mem_block *element; union acpi_descriptor *descriptor; u32 num_outstanding = 0; ACPI_FUNCTION_TRACE ("ut_dump_allocations"); /* * Walk the allocation list. */ if (ACPI_FAILURE (acpi_ut_acquire_mutex (ACPI_MTX_MEMORY))) { return; } element = acpi_gbl_memory_lists[0].list_head; while (element) { if ((element->component & component) && ((module == NULL) || (0 == ACPI_STRCMP (module, element->module)))) { /* Ignore allocated objects that are in a cache */ descriptor = ACPI_CAST_PTR (union acpi_descriptor, &element->user_space); if (descriptor->descriptor_id != ACPI_DESC_TYPE_CACHED) { acpi_os_printf ("%p Len %04X %9.9s-%d [%s] ", descriptor, element->size, element->module, element->line, acpi_ut_get_descriptor_name (descriptor)); /* Most of the elements will be Operand objects. */ switch (ACPI_GET_DESCRIPTOR_TYPE (descriptor)) { case ACPI_DESC_TYPE_OPERAND: acpi_os_printf ("%12.12s R%hd", acpi_ut_get_type_name (descriptor->object.common.type), descriptor->object.common.reference_count); break; case ACPI_DESC_TYPE_PARSER: acpi_os_printf ("aml_opcode %04hX", descriptor->op.asl.aml_opcode); break; case ACPI_DESC_TYPE_NAMED: acpi_os_printf ("%4.4s", acpi_ut_get_node_name (&descriptor->node)); break; default: break; } acpi_os_printf ( "\n"); num_outstanding++; } } element = element->next; } (void) acpi_ut_release_mutex (ACPI_MTX_MEMORY); /* Print summary */ if (!num_outstanding) { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No outstanding allocations.\n")); } else { ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%d(%X) Outstanding allocations\n", num_outstanding, num_outstanding)); } return_VOID; } #endif /* #ifdef ACPI_DBG_TRACK_ALLOCATIONS */