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