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/*-
* Copyright (c) 2003, 2004 Silicon Graphics International Corp.
* 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.
*
* 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.
*
* $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_mem_pool.h#1 $
* $FreeBSD: release/9.1.0/sys/cam/ctl/ctl_mem_pool.h 229997 2012-01-12 00:34:33Z ken $
*/
/*
* CAM Target Layer memory pool code.
*
* Author: Ken Merry <ken@FreeBSD.org>
*/
#ifndef _CTL_MEMPOOL_H_
#define _CTL_MEMPOOL_H_
typedef enum {
CTL_MEM_POOL_NONE,
CTL_MEM_POOL_PERM_GROW
} ctl_mem_pool_flags;
struct ctl_mem_pool {
ctl_mem_pool_flags flags;
int chunk_size;
int grow_inc;
struct mtx lock;
struct cv wait_mem;
STAILQ_HEAD(, ctl_mem_element) free_mem_list;
};
typedef enum {
CTL_MEM_ELEMENT_NONE,
CTL_MEM_ELEMENT_PREALLOC
} ctl_mem_element_flags;
struct ctl_mem_element {
ctl_mem_element_flags flags;
struct ctl_mem_pool *pool;
uint8_t *bytes;
STAILQ_ENTRY(ctl_mem_element) links;
};
#ifdef _KERNEL
MALLOC_DECLARE(M_CTL_POOL);
int ctl_init_mem_pool(struct ctl_mem_pool *pool, int chunk_size,
ctl_mem_pool_flags flags, int grow_inc,
int initial_pool_size);
struct ctl_mem_element *ctl_alloc_mem_element(struct ctl_mem_pool *pool,
int can_wait);
void ctl_free_mem_element(struct ctl_mem_element *mem);
int ctl_grow_mem_pool(struct ctl_mem_pool *pool, int count,
int can_wait);
int ctl_shrink_mem_pool(struct ctl_mem_pool *pool);
#endif /* _KERNEL */
#endif /* _CTL_MEMPOOL_H_ */