/*-
 * Copyright (c) 2002-2007 Neterion, Inc.
 * 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.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, 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 DAMAGE.
 *
 * $FreeBSD: release/9.0.0/sys/dev/nxge/include/xgehal-mm.h 173139 2007-10-29 14:19:32Z rwatson $
 */

#ifndef XGE_HAL_MM_H
#define XGE_HAL_MM_H

#include <dev/nxge/include/xge-os-pal.h>
#include <dev/nxge/include/xge-debug.h>
#include <dev/nxge/include/xgehal-types.h>
#include <dev/nxge/include/xgehal-driver.h>

__EXTERN_BEGIN_DECLS

typedef void* xge_hal_mempool_h;

/*
 * struct xge_hal_mempool_dma_t - Represents DMA objects passed to the
 caller.
 */
typedef struct xge_hal_mempool_dma_t {
	dma_addr_t          addr;
	pci_dma_h           handle;
	pci_dma_acc_h           acc_handle;
} xge_hal_mempool_dma_t;

/*
 * xge_hal_mempool_item_f  - Mempool item alloc/free callback
 * @mempoolh: Memory pool handle.
 * @item: Item that gets allocated or freed.
 * @index: Item's index in the memory pool.
 * @is_last: True, if this item is the last one in the pool; false - otherwise.
 * userdat: Per-pool user context.
 *
 * Memory pool allocation/deallocation callback.
 */
typedef xge_hal_status_e (*xge_hal_mempool_item_f) (xge_hal_mempool_h mempoolh,
	            void *memblock, int memblock_index,
	            xge_hal_mempool_dma_t *dma_object, void *item,
	            int index, int is_last, void *userdata);

/*
 * struct xge_hal_mempool_t - Memory pool.
 */
typedef struct xge_hal_mempool_t {
	xge_hal_mempool_item_f      item_func_alloc;
	xge_hal_mempool_item_f      item_func_free;
	void                *userdata;
	void                **memblocks_arr;
	void                **memblocks_priv_arr;
	xge_hal_mempool_dma_t       *memblocks_dma_arr;
	pci_dev_h           pdev;
	int             memblock_size;
	int             memblocks_max;
	int             memblocks_allocated;
	int             item_size;
	int             items_max;
	int             items_initial;
	int             items_current;
	int             items_per_memblock;
	void                **items_arr;
	void                **shadow_items_arr;
	int             items_priv_size;
} xge_hal_mempool_t;

/*
 * __hal_mempool_item - Returns pointer to the item in the mempool
 * items array.
 */
static inline void*
__hal_mempool_item(xge_hal_mempool_t *mempool, int index)
{
	return mempool->items_arr[index];
}

/*
 * __hal_mempool_item_priv - will return pointer on per item private space
 */
static inline void*
__hal_mempool_item_priv(xge_hal_mempool_t *mempool, int memblock_idx,
	        void *item, int *memblock_item_idx)
{
	ptrdiff_t offset;
	void *memblock = mempool->memblocks_arr[memblock_idx];

	xge_assert(memblock);

	offset = (int)((char * )item - (char *)memblock);
	xge_assert(offset >= 0 && offset < mempool->memblock_size);

	(*memblock_item_idx) = (int) offset / mempool->item_size;
	xge_assert((*memblock_item_idx) < mempool->items_per_memblock);

	return (char*)mempool->memblocks_priv_arr[memblock_idx] +
	            (*memblock_item_idx) * mempool->items_priv_size;
}

/*
 * __hal_mempool_items_arr - will return pointer to the items array in the
 *  mempool.
 */
static inline void*
__hal_mempool_items_arr(xge_hal_mempool_t *mempool)
{
	return mempool->items_arr;
}

/*
 * __hal_mempool_memblock - will return pointer to the memblock in the
 *  mempool memblocks array.
 */
static inline void*
__hal_mempool_memblock(xge_hal_mempool_t *mempool, int memblock_idx)
{
	xge_assert(mempool->memblocks_arr[memblock_idx]);
	return mempool->memblocks_arr[memblock_idx];
}

/*
 * __hal_mempool_memblock_dma - will return pointer to the dma block
 *  corresponds to the memblock(identified by memblock_idx) in the mempool.
 */
static inline xge_hal_mempool_dma_t*
__hal_mempool_memblock_dma(xge_hal_mempool_t *mempool, int memblock_idx)
{
	return mempool->memblocks_dma_arr + memblock_idx;
}

xge_hal_status_e __hal_mempool_grow(xge_hal_mempool_t *mempool,
	        int num_allocate, int *num_allocated);

xge_hal_mempool_t* __hal_mempool_create(pci_dev_h pdev, int memblock_size,
	        int item_size, int private_size, int items_initial,
	        int items_max, xge_hal_mempool_item_f item_func_alloc,
	        xge_hal_mempool_item_f item_func_free, void *userdata);

void __hal_mempool_destroy(xge_hal_mempool_t *mempool);


__EXTERN_END_DECLS

#endif /* XGE_HAL_MM_H */
