1/*- 2 * Copyright (c) 2003, 2004 Silicon Graphics International Corp. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer, 10 * without modification. 11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 12 * substantially similar to the "NO WARRANTY" disclaimer below 13 * ("Disclaimer") and any redistribution must be conditioned upon 14 * including a substantially similar Disclaimer requirement for further 15 * binary redistribution. 16 * 17 * NO WARRANTY 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 27 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGES. 29 * 30 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_mem_pool.h#1 $ 31 * $FreeBSD$ 32 */ 33/* 34 * CAM Target Layer memory pool code. 35 * 36 * Author: Ken Merry <ken@FreeBSD.org> 37 */ 38 39#ifndef _CTL_MEMPOOL_H_ 40#define _CTL_MEMPOOL_H_ 41 42typedef enum { 43 CTL_MEM_POOL_NONE, 44 CTL_MEM_POOL_PERM_GROW 45} ctl_mem_pool_flags; 46 47struct ctl_mem_pool { 48 ctl_mem_pool_flags flags; 49 int chunk_size; 50 int grow_inc; 51 struct mtx lock; 52 struct cv wait_mem; 53 STAILQ_HEAD(, ctl_mem_element) free_mem_list; 54}; 55 56typedef enum { 57 CTL_MEM_ELEMENT_NONE, 58 CTL_MEM_ELEMENT_PREALLOC 59} ctl_mem_element_flags; 60 61struct ctl_mem_element { 62 ctl_mem_element_flags flags; 63 struct ctl_mem_pool *pool; 64 uint8_t *bytes; 65 STAILQ_ENTRY(ctl_mem_element) links; 66}; 67 68#ifdef _KERNEL 69 70MALLOC_DECLARE(M_CTL_POOL); 71 72int ctl_init_mem_pool(struct ctl_mem_pool *pool, int chunk_size, 73 ctl_mem_pool_flags flags, int grow_inc, 74 int initial_pool_size); 75struct ctl_mem_element *ctl_alloc_mem_element(struct ctl_mem_pool *pool, 76 int can_wait); 77void ctl_free_mem_element(struct ctl_mem_element *mem); 78int ctl_grow_mem_pool(struct ctl_mem_pool *pool, int count, 79 int can_wait); 80int ctl_shrink_mem_pool(struct ctl_mem_pool *pool); 81#endif /* _KERNEL */ 82 83#endif /* _CTL_MEMPOOL_H_ */ 84