/* BEGIN_ICS_COPYRIGHT3 ****************************************

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/* [ICS VERSION STRING: unknown] */

#ifndef _IBA_PUBLIC_IHEAP_MANAGER_H

#define _IBA_PUBLIC_IHEAP_MANAGER_H

#include "iba/public/datatypes.h"

#include "iba/public/ispinlock.h"

#include "iba/public/ilist.h"

#if defined(__cplusplus)

extern "C" {

#endif

/* A simple heap is implemented

 * This can be given a range of addresses to manage, such as HFI local memory

 * and will provide allocate and free functions against that memory

 * No pointers are maintained in the memory managed by the heap itself

 * This means the memory can be in a slower access location, such as across

 * PCI without impacting the performance of these functions

 */

#define HEAP_DEBUG 0	/* set to 1 to enable heap debugging */

#define HEAP_MANAGER_DEBUG 0	/* set to 1 to enable heap manager logging */

/* HEAP_OBJECT flags */

#define HEAP_OBJECT_PREALLOCATED 1	/* part of initial sizing, don't release */

#define HEAP_OBJECT_IN_USE		2

#define HEAP_ERROR_RATE_LIMIT (10*60)/* report malloc errors no faster than this */

typedef struct _HEAP_OBJECT

{

	union {

		LIST_ITEM		list_item;	/* for internal use, bucket_lists */

		struct {					/* valid only when allocated */

			uint64 		addr;		/* heap start + offset */

			ATOMIC_UINT	refcount;	/* refcount for shared memory */

		} info;

	} u;

	uint8				flag; 		/* HEAP_OBJECT flags above */

	uint32				size;		/* actual size in bytes */

	uint32				offset;		/* offset from heap start address */

		/* these lists track all blocks */

	struct _HEAP_OBJECT *prev;		/* for internal use, links for buddies */

	struct _HEAP_OBJECT *next;		/* for internal use, links for buddies */

} HEAP_OBJECT;

typedef struct _HEAP_MANAGER

{

	uint32		available_memory;	/* unassigned memory at end of heap */

	uint32		max_memory;			/* total size of heap */

	uint64		start_addr;			/* physical start address of memory */

	uint32		cur_offset;			/* offset of 1st unassigned memory */

	SPIN_LOCK	heap_lock;

	QUICK_LIST	bucket_lists[32];	/* free memory chunck in power of 2 order*/

	uint32		block_size;			/* smallest block size in bytes */

	uint32		water_mark;			/* not used yet */

	uint32		tag;

	HEAP_OBJECT	*heap_object;

	const char	name[100];	

	HEAP_OBJECT *last_obj;			/* all blocks */

	uint32		last_error_time;	/* timestamp when last error reported */

#if HEAP_DEBUG	

	uint32		malloc_count;

#endif	

} HEAP_MANAGER;

typedef struct _HEAP_INIT

{

	uint64		start_addr;				/* initial address of heap */

	uint32		block_size;				/* size of blocks */

	uint32		buck_init_count[32];	/* count of initial assignment of

										 * buffers to each bucket

										 */

	uint32		max_memory;				/* should be power of 2 */

	uint32		water_mark;				/* Minimal amount memory before

										 * rearange from bucket

										 */  	

} HEAP_INIT;	

static __inline void HeapManagerIncBucketInit(HEAP_INIT *heap_init,

											uint32 log2_size)

{

	heap_init->buck_init_count[log2_size]++;

}

void HeapManagerInitState(HEAP_MANAGER *heap_mng);

FSTATUS HeapManagerInit(HEAP_MANAGER* heap_mng, const HEAP_INIT *heap_init,

						const char* name, uint32 tag);

void HeapManagerDestroy(HEAP_MANAGER *heap_mng);

HEAP_OBJECT * HeapManagerAllocate(HEAP_MANAGER *heap_mng, uint32 size);

FSTATUS HeapManagerDeallocate(HEAP_MANAGER *heap_mng, HEAP_OBJECT *heap_obj);

void HeapManagerRelease(HEAP_MANAGER *heap_mng, HEAP_OBJECT *heap_obj);

void HeapManagerPrintSummary(HEAP_MANAGER *heap_mng);

uint32 HeapManagerGetAvailable(HEAP_MANAGER *heap_mng);

uint32 HeapManagerGetUsed(HEAP_MANAGER *heap_mng);

uint32 HeapManagerGetMaxMemory(HEAP_MANAGER *heap_mng);

void HeapManagerIncRefCount(HEAP_MANAGER *heap_mng, HEAP_OBJECT *heap_obj);

void HeapManagerDecRefCount(HEAP_MANAGER *heap_mng, HEAP_OBJECT *heap_obj);

static __inline uint32 HeapManagerGetRefCount(HEAP_OBJECT *heap_obj)

{

	return AtomicRead(&heap_obj->u.info.refcount);

}

static __inline uint64 HeapManagerGetAddr(HEAP_OBJECT *heap_obj)

{

	return heap_obj->u.info.addr;

}

static __inline uint32 HeapManagerGetSize(HEAP_OBJECT *heap_obj)

{

	return heap_obj->size;

}

#if defined(__cplusplus)

}

#endif

#endif /* _IBA_PUBLIC_IHEAP_MANAGER_H */