1 /*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2017 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 * $FreeBSD$
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 <sys/limits.h>
38 #include <vm/uma.h>
39
40 #include <linux/types.h>
41 #include <linux/gfp.h>
42
43 MALLOC_DECLARE(M_KMALLOC);
44
45 #define kvmalloc(size, flags) kmalloc(size, flags)
46 #define kvzalloc(size, flags) kmalloc(size, (flags) | __GFP_ZERO)
47 #define kvcalloc(n, size, flags) kvmalloc_array(n, size, (flags) | __GFP_ZERO)
48 #define kzalloc(size, flags) kmalloc(size, (flags) | __GFP_ZERO)
49 #define kzalloc_node(size, flags, node) kmalloc(size, (flags) | __GFP_ZERO)
50 #define kfree_const(ptr) kfree(ptr)
51 #define vzalloc(size) __vmalloc(size, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO, 0)
52 #define vfree(arg) kfree(arg)
53 #define kvfree(arg) kfree(arg)
54 #define vmalloc_node(size, node) __vmalloc(size, GFP_KERNEL, 0)
55 #define vmalloc_user(size) __vmalloc(size, GFP_KERNEL | __GFP_ZERO, 0)
56 #define vmalloc(size) __vmalloc(size, GFP_KERNEL, 0)
57 #define __kmalloc(...) kmalloc(__VA_ARGS__)
58 #define kmalloc_node(chunk, flags, n) kmalloc(chunk, flags)
59
60 /*
61 * Prefix some functions with linux_ to avoid namespace conflict
62 * with the OpenSolaris code in the kernel.
63 */
64 #define kmem_cache linux_kmem_cache
65 #define kmem_cache_create(...) linux_kmem_cache_create(__VA_ARGS__)
66 #define kmem_cache_alloc(...) linux_kmem_cache_alloc(__VA_ARGS__)
67 #define kmem_cache_free(...) linux_kmem_cache_free(__VA_ARGS__)
68 #define kmem_cache_destroy(...) linux_kmem_cache_destroy(__VA_ARGS__)
69
70 #define KMEM_CACHE(__struct, flags) \
71 linux_kmem_cache_create(#__struct, sizeof(struct __struct), \
72 __alignof(struct __struct), (flags), NULL)
73
74 typedef void linux_kmem_ctor_t (void *);
75
76 struct linux_kmem_cache {
77 uma_zone_t cache_zone;
78 linux_kmem_ctor_t *cache_ctor;
79 unsigned cache_flags;
80 unsigned cache_size;
81 };
82
83 #define SLAB_HWCACHE_ALIGN (1 << 0)
84 #define SLAB_TYPESAFE_BY_RCU (1 << 1)
85 #define SLAB_RECLAIM_ACCOUNT (1 << 2)
86
87 #define SLAB_DESTROY_BY_RCU \
88 SLAB_TYPESAFE_BY_RCU
89
90 #define ARCH_KMALLOC_MINALIGN \
91 __alignof(unsigned long long)
92
93 static inline gfp_t
linux_check_m_flags(gfp_t flags)94 linux_check_m_flags(gfp_t flags)
95 {
96 const gfp_t m = M_NOWAIT | M_WAITOK;
97
98 /* make sure either M_NOWAIT or M_WAITOK is set */
99 if ((flags & m) == 0)
100 flags |= M_NOWAIT;
101 else if ((flags & m) == m)
102 flags &= ~M_WAITOK;
103
104 /* mask away LinuxKPI specific flags */
105 return (flags & GFP_NATIVE_MASK);
106 }
107
108 static inline void *
kmalloc(size_t size,gfp_t flags)109 kmalloc(size_t size, gfp_t flags)
110 {
111 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags)));
112 }
113
114 static inline void *
kcalloc(size_t n,size_t size,gfp_t flags)115 kcalloc(size_t n, size_t size, gfp_t flags)
116 {
117 flags |= __GFP_ZERO;
118 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags)));
119 }
120
121 static inline void *
__vmalloc(size_t size,gfp_t flags,int other)122 __vmalloc(size_t size, gfp_t flags, int other)
123 {
124 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags)));
125 }
126
127 static inline void *
vmalloc_32(size_t size)128 vmalloc_32(size_t size)
129 {
130 return (contigmalloc(size, M_KMALLOC, M_WAITOK, 0, UINT_MAX, 1, 1));
131 }
132
133 static inline void *
kmalloc_array(size_t n,size_t size,gfp_t flags)134 kmalloc_array(size_t n, size_t size, gfp_t flags)
135 {
136 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags)));
137 }
138
139 static inline void *
kvmalloc_array(size_t n,size_t size,gfp_t flags)140 kvmalloc_array(size_t n, size_t size, gfp_t flags)
141 {
142 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags)));
143 }
144
145 static inline void *
krealloc(void * ptr,size_t size,gfp_t flags)146 krealloc(void *ptr, size_t size, gfp_t flags)
147 {
148 return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags)));
149 }
150
151 static inline void
kfree(const void * ptr)152 kfree(const void *ptr)
153 {
154 free(__DECONST(void *, ptr), M_KMALLOC);
155 }
156
157 extern struct linux_kmem_cache *linux_kmem_cache_create(const char *name,
158 size_t size, size_t align, unsigned flags, linux_kmem_ctor_t *ctor);
159
160 static inline void *
linux_kmem_cache_alloc(struct linux_kmem_cache * c,gfp_t flags)161 linux_kmem_cache_alloc(struct linux_kmem_cache *c, gfp_t flags)
162 {
163 return (uma_zalloc_arg(c->cache_zone, c,
164 linux_check_m_flags(flags)));
165 }
166
167 static inline void *
kmem_cache_zalloc(struct linux_kmem_cache * c,gfp_t flags)168 kmem_cache_zalloc(struct linux_kmem_cache *c, gfp_t flags)
169 {
170 return (uma_zalloc_arg(c->cache_zone, c,
171 linux_check_m_flags(flags | M_ZERO)));
172 }
173
174 extern void linux_kmem_cache_free_rcu(struct linux_kmem_cache *, void *);
175
176 static inline void
linux_kmem_cache_free(struct linux_kmem_cache * c,void * m)177 linux_kmem_cache_free(struct linux_kmem_cache *c, void *m)
178 {
179 if (unlikely(c->cache_flags & SLAB_TYPESAFE_BY_RCU))
180 linux_kmem_cache_free_rcu(c, m);
181 else
182 uma_zfree(c->cache_zone, m);
183 }
184
185 extern void linux_kmem_cache_destroy(struct linux_kmem_cache *);
186
187 #endif /* _LINUX_SLAB_H_ */
188