slab.h revision 310247 
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 310247 2016-12-19 09:42:43Z 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
58
59/*
60 * Prefix some functions with linux_ to avoid namespace conflict
61 * with the OpenSolaris code in the kernel.
62 */
63#define	kmem_cache		linux_kmem_cache
64#define	kmem_cache_create(...)	linux_kmem_cache_create(__VA_ARGS__)
65#define	kmem_cache_alloc(...)	linux_kmem_cache_alloc(__VA_ARGS__)
66#define	kmem_cache_free(...) 	linux_kmem_cache_free(__VA_ARGS__)
67#define	kmem_cache_destroy(...) linux_kmem_cache_destroy(__VA_ARGS__)
68
69struct linux_kmem_cache {
70	uma_zone_t	cache_zone;
71	void		(*cache_ctor)(void *);
72};
73
74#define	SLAB_HWCACHE_ALIGN	0x0001
75
76static inline int
77linux_kmem_ctor(void *mem, int size, void *arg, int flags)
78{
79	void (*ctor)(void *);
80
81	ctor = arg;
82	ctor(mem);
83
84	return (0);
85}
86
87static inline struct kmem_cache *
88linux_kmem_cache_create(char *name, size_t size, size_t align, u_long flags,
89    void (*ctor)(void *))
90{
91	struct kmem_cache *c;
92
93	c = malloc(sizeof(*c), M_KMALLOC, M_WAITOK);
94	if (align)
95		align--;
96	if (flags & SLAB_HWCACHE_ALIGN)
97		align = UMA_ALIGN_CACHE;
98	c->cache_zone = uma_zcreate(name, size, ctor ? linux_kmem_ctor : NULL,
99	    NULL, NULL, NULL, align, 0);
100	c->cache_ctor = ctor;
101
102	return c;
103}
104
105static inline void *
106linux_kmem_cache_alloc(struct kmem_cache *c, int flags)
107{
108	return uma_zalloc_arg(c->cache_zone, c->cache_ctor, flags);
109}
110
111static inline void
112linux_kmem_cache_free(struct kmem_cache *c, void *m)
113{
114	uma_zfree(c->cache_zone, m);
115}
116
117static inline void
118linux_kmem_cache_destroy(struct kmem_cache *c)
119{
120	uma_zdestroy(c->cache_zone);
121	free(c, M_KMALLOC);
122}
123
124#endif	/* _LINUX_SLAB_H_ */
125