slab.h revision 310245 
1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice unmodified, this list of conditions, and the following
13 *    disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD: stable/11/sys/compat/linuxkpi/common/include/linux/slab.h 310245 2016-12-19 09:40:29Z hselasky $
30 */
31#ifndef	_LINUX_SLAB_H_
32#define	_LINUX_SLAB_H_
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/malloc.h>
37#include <vm/uma.h>
38
39#include <linux/types.h>
40#include <linux/gfp.h>
41
42MALLOC_DECLARE(M_KMALLOC);
43
44#define	kmalloc(size, flags)		malloc((size), M_KMALLOC, (flags))
45#define	kvmalloc(size)			kmalloc((size), 0)
46#define	kzalloc(size, flags)		kmalloc((size), M_ZERO | ((flags) ? (flags) : M_NOWAIT))
47#define	kzalloc_node(size, flags, node)	kzalloc(size, flags)
48#define	kfree(ptr)			free(__DECONST(void *, (ptr)), M_KMALLOC)
49#define	kfree_const(ptr)		kfree(ptr)
50#define	krealloc(ptr, size, flags)	realloc((ptr), (size), M_KMALLOC, (flags))
51#define	kcalloc(n, size, flags)	        kmalloc((n) * (size), flags | M_ZERO)
52#define	vzalloc(size)			kzalloc(size, GFP_KERNEL | __GFP_NOWARN)
53#define	vfree(arg)			kfree(arg)
54#define	kvfree(arg)			kfree(arg)
55#define	vmalloc(size)                   kmalloc(size, GFP_KERNEL)
56#define	vmalloc_node(size, node)        kmalloc(size, GFP_KERNEL)
57
58struct kmem_cache {
59	uma_zone_t	cache_zone;
60	void		(*cache_ctor)(void *);
61};
62
63#define	SLAB_HWCACHE_ALIGN	0x0001
64
65static inline int
66kmem_ctor(void *mem, int size, void *arg, int flags)
67{
68	void (*ctor)(void *);
69
70	ctor = arg;
71	ctor(mem);
72
73	return (0);
74}
75
76static inline struct kmem_cache *
77kmem_cache_create(char *name, size_t size, size_t align, u_long flags,
78    void (*ctor)(void *))
79{
80	struct kmem_cache *c;
81
82	c = malloc(sizeof(*c), M_KMALLOC, M_WAITOK);
83	if (align)
84		align--;
85	if (flags & SLAB_HWCACHE_ALIGN)
86		align = UMA_ALIGN_CACHE;
87	c->cache_zone = uma_zcreate(name, size, ctor ? kmem_ctor : NULL,
88	    NULL, NULL, NULL, align, 0);
89	c->cache_ctor = ctor;
90
91	return c;
92}
93
94static inline void *
95kmem_cache_alloc(struct kmem_cache *c, int flags)
96{
97	return uma_zalloc_arg(c->cache_zone, c->cache_ctor, flags);
98}
99
100static inline void
101kmem_cache_free(struct kmem_cache *c, void *m)
102{
103	uma_zfree(c->cache_zone, m);
104}
105
106static inline void
107kmem_cache_destroy(struct kmem_cache *c)
108{
109	uma_zdestroy(c->cache_zone);
110	free(c, M_KMALLOC);
111}
112
113#endif	/* _LINUX_SLAB_H_ */
114