/*
* Memory pools library, Public interface
*
* API Overview
*
* This package provides a memory allocation subsystem based on pools of
* homogenous objects.
*
* Instrumentation is available for reporting memory utilization both
* on a per-data-structure basis and system wide.
*
* There are two main types defined in this API.
*
* pool manager: A singleton object that acts as a factory for
* pool allocators. It also is used for global
* instrumentation, such as reporting all blocks
* in use across all data structures. The pool manager
* creates and provides individual memory pools
* upon request to application code.
*
* memory pool: An object for allocating homogenous memory blocks.
*
* Global identifiers in this module use the following prefixes:
* bcm_mpm_* Memory pool manager
* bcm_mp_* Memory pool
*
* There are two main types of memory pools:
*
* prealloc: The contiguous memory block of objects can either be supplied
* by the client or malloc'ed by the memory manager. The objects are
* allocated out of a block of memory and freed back to the block.
*
* heap: The memory pool allocator uses the heap (malloc/free) for memory.
* In this case, the pool allocator is just providing statistics
* and instrumentation on top of the heap, without modifying the heap
* allocation implementation.
*
* Copyright (C) 1999-2012, Broadcom Corporation
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2 (the "GPL"),
* available at http://www.broadcom.com/licenses/GPLv2.php, with the
* following added to such license:
*
* As a special exception, the copyright holders of this software give you
* permission to link this software with independent modules, and to copy and
* distribute the resulting executable under terms of your choice, provided that
* you also meet, for each linked independent module, the terms and conditions of
* the license of that module. An independent module is a module which is not
* derived from this software. The special exception does not apply to any
* modifications of the software.
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a license
* other than the GPL, without Broadcom's express prior written consent.
*
* $Id$
*/
#ifndef _BCM_MPOOL_PUB_H
#define _BCM_MPOOL_PUB_H 1
#include <typedefs.h> /* needed for uint16 */
/*
**************************************************************************
*
* Type definitions, handles
*
**************************************************************************
*/
/* Forward declaration of OSL handle. */
struct osl_info;
/* Forward declaration of string buffer. */
struct bcmstrbuf;
/*
* Opaque type definition for the pool manager handle. This object is used for global
* memory pool operations such as obtaining a new pool, deleting a pool, iterating and
* instrumentation/debugging.
*/
struct bcm_mpm_mgr;
typedef struct bcm_mpm_mgr *bcm_mpm_mgr_h;
/*
* Opaque type definition for an instance of a pool. This handle is used for allocating
* and freeing memory through the pool, as well as management/instrumentation on this
* specific pool.
*/
struct bcm_mp_pool;
typedef struct bcm_mp_pool *bcm_mp_pool_h;
/*
* To make instrumentation more readable, every memory
* pool must have a readable name. Pool names are up to
* 8 bytes including '\0' termination. (7 printable characters.)
*/
#define BCM_MP_NAMELEN 8
/*
* Type definition for pool statistics.
*/
typedef struct bcm_mp_stats {
char name[BCM_MP_NAMELEN]; /* Name of this pool. */
unsigned int objsz; /* Object size allocated in this pool */
uint16 nobj; /* Total number of objects in this pool */
uint16 num_alloc; /* Number of objects currently allocated */
uint16 high_water; /* Max number of allocated objects. */
uint16 failed_alloc; /* Failed allocations. */
} bcm_mp_stats_t;
/*
**************************************************************************
*
* API Routines on the pool manager.
*
**************************************************************************
*/
/*
* bcm_mpm_init() - initialize the whole memory pool system.
*
* Parameters:
* osh: INPUT Operating system handle. Needed for heap memory allocation.
* max_pools: INPUT Maximum number of mempools supported.
* mgr: OUTPUT The handle is written with the new pools manager object/handle.
*
* Returns:
* BCME_OK Object initialized successfully. May be used.
* BCME_NOMEM Initialization failed due to no memory. Object must not be used.
*/
int bcm_mpm_init(struct osl_info *osh, int max_pools, bcm_mpm_mgr_h *mgrp);
/*
* bcm_mpm_deinit() - de-initialize the whole memory pool system.
*
* Parameters:
* mgr: INPUT Pointer to pool manager handle.
*
* Returns:
* BCME_OK Memory pool manager successfully de-initialized.
* other Indicated error occured during de-initialization.
*/
int bcm_mpm_deinit(bcm_mpm_mgr_h *mgrp);
/*
* bcm_mpm_create_prealloc_pool() - Create a new pool for fixed size objects. The
* pool uses a contiguous block of pre-alloced
* memory. The memory block may either be provided
* by the client or dynamically allocated by the
* pool manager.
*
* Parameters:
* mgr: INPUT The handle to the pool manager
* obj_sz: INPUT Size of objects that will be allocated by the new pool
* Must be >= sizeof(void *).
* nobj: INPUT Maximum number of concurrently existing objects to support
* memstart INPUT Pointer to the memory to use, or NULL to malloc()
* memsize INPUT Number of bytes referenced from memstart (for error checking).
* Must be 0 if 'memstart' is NULL.
* poolname INPUT For instrumentation, the name of the pool
* newp: OUTPUT The handle for the new pool, if creation is successful
*
* Returns:
* BCME_OK Pool created ok.
* other Pool not created due to indicated error. newpoolp set to NULL.
*
*
*/
int bcm_mpm_create_prealloc_pool(bcm_mpm_mgr_h mgr,
unsigned int obj_sz,
int nobj,
void *memstart,
unsigned int memsize,
char poolname[BCM_MP_NAMELEN],
bcm_mp_pool_h *newp);
/*
* bcm_mpm_delete_prealloc_pool() - Delete a memory pool. This should only be called after
* all memory objects have been freed back to the pool.
*
* Parameters:
* mgr: INPUT The handle to the pools manager
* pool: INPUT The handle of the pool to delete
*
* Returns:
* BCME_OK Pool deleted ok.
* other Pool not deleted due to indicated error.
*
*/
int bcm_mpm_delete_prealloc_pool(bcm_mpm_mgr_h mgr, bcm_mp_pool_h *poolp);
/*
* bcm_mpm_create_heap_pool() - Create a new pool for fixed size objects. The memory
* pool allocator uses the heap (malloc/free) for memory.
* In this case, the pool allocator is just providing
* statistics and instrumentation on top of the heap,
* without modifying the heap allocation implementation.
*
* Parameters:
* mgr: INPUT The handle to the pool manager
* obj_sz: INPUT Size of objects that will be allocated by the new pool
* poolname INPUT For instrumentation, the name of the pool
* newp: OUTPUT The handle for the new pool, if creation is successful
*
* Returns:
* BCME_OK Pool created ok.
* other Pool not created due to indicated error. newpoolp set to NULL.
*
*
*/
int bcm_mpm_create_heap_pool(bcm_mpm_mgr_h mgr, unsigned int obj_sz,
char poolname[BCM_MP_NAMELEN],
bcm_mp_pool_h *newp);
/*
* bcm_mpm_delete_heap_pool() - Delete a memory pool. This should only be called after
* all memory objects have been freed back to the pool.
*
* Parameters:
* mgr: INPUT The handle to the pools manager
* pool: INPUT The handle of the pool to delete
*
* Returns:
* BCME_OK Pool deleted ok.
* other Pool not deleted due to indicated error.
*
*/
int bcm_mpm_delete_heap_pool(bcm_mpm_mgr_h mgr, bcm_mp_pool_h *poolp);
/*
* bcm_mpm_stats() - Return stats for all pools
*
* Parameters:
* mgr: INPUT The handle to the pools manager
* stats: OUTPUT Array of pool statistics.
* nentries: MOD Max elements in 'stats' array on INPUT. Actual number
* of array elements copied to 'stats' on OUTPUT.
*
* Returns:
* BCME_OK Ok
* other Error getting stats.
*
*/
int bcm_mpm_stats(bcm_mpm_mgr_h mgr, bcm_mp_stats_t *stats, int *nentries);
/*
* bcm_mpm_dump() - Display statistics on all pools
*
* Parameters:
* mgr: INPUT The handle to the pools manager
* b: OUTPUT Output buffer.
*
* Returns:
* BCME_OK Ok
* other Error during dump.
*
*/
int bcm_mpm_dump(bcm_mpm_mgr_h mgr, struct bcmstrbuf *b);
/*
* bcm_mpm_get_obj_size() - The size of memory objects may need to be padded to
* compensate for alignment requirements of the objects.
* This function provides the padded object size. If clients
* pre-allocate a memory slab for a memory pool, the
* padded object size should be used by the client to allocate
* the memory slab (in order to provide sufficent space for
* the maximum number of objects).
*
* Parameters:
* mgr: INPUT The handle to the pools manager.
* obj_sz: INPUT Input object size.
* padded_obj_sz: OUTPUT Padded object size.
*
* Returns:
* BCME_OK Ok
* BCME_BADARG Bad arguments.
*
*/
int bcm_mpm_get_obj_size(bcm_mpm_mgr_h mgr, unsigned int obj_sz, unsigned int *padded_obj_sz);
/*
***************************************************************************
*
* API Routines on a specific pool.
*
***************************************************************************
*/
/*
* bcm_mp_alloc() - Allocate a memory pool object.
*
* Parameters:
* pool: INPUT The handle to the pool.
*
* Returns:
* A pointer to the new object. NULL on error.
*
*/
void* bcm_mp_alloc(bcm_mp_pool_h pool);
/*
* bcm_mp_free() - Free a memory pool object.
*
* Parameters:
* pool: INPUT The handle to the pool.
* objp: INPUT A pointer to the object to free.
*
* Returns:
* BCME_OK Ok
* other Error during free.
*
*/
int bcm_mp_free(bcm_mp_pool_h pool, void *objp);
/*
* bcm_mp_stats() - Return stats for this pool
*
* Parameters:
* pool: INPUT The handle to the pool
* stats: OUTPUT Pool statistics
*
* Returns:
* BCME_OK Ok
* other Error getting statistics.
*
*/
int bcm_mp_stats(bcm_mp_pool_h pool, bcm_mp_stats_t *stats);
/*
* bcm_mp_dump() - Dump a pool
*
* Parameters:
* pool: INPUT The handle to the pool
* b OUTPUT Output buffer
*
* Returns:
* BCME_OK Ok
* other Error during dump.
*
*/
int bcm_mp_dump(bcm_mp_pool_h pool, struct bcmstrbuf *b);
#endif /* _BCM_MPOOL_PUB_H */