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 <sys/proc.h> 39 #include <vm/uma.h> 40 41 #include <linux/types.h> 42 #include <linux/gfp.h> 43 #include <linux/llist.h> 44 45 MALLOC_DECLARE(M_KMALLOC); 46 47 #define kvmalloc(size, flags) kmalloc(size, flags) 48 #define kvzalloc(size, flags) kmalloc(size, (flags) | __GFP_ZERO) 49 #define kvcalloc(n, size, flags) kvmalloc_array(n, size, (flags) | __GFP_ZERO) 50 #define kzalloc(size, flags) kmalloc(size, (flags) | __GFP_ZERO) 51 #define kzalloc_node(size, flags, node) kmalloc(size, (flags) | __GFP_ZERO) 52 #define kfree_const(ptr) kfree(ptr) 53 #define vzalloc(size) __vmalloc(size, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO, 0) 54 #define vfree(arg) kfree(arg) 55 #define kvfree(arg) kfree(arg) 56 #define vmalloc_node(size, node) __vmalloc(size, GFP_KERNEL, 0) 57 #define vmalloc_user(size) __vmalloc(size, GFP_KERNEL | __GFP_ZERO, 0) 58 #define vmalloc(size) __vmalloc(size, GFP_KERNEL, 0) 59 #define __kmalloc(...) kmalloc(__VA_ARGS__) 60 #define kmalloc_node(chunk, flags, n) kmalloc(chunk, flags) 61 62 /* 63 * Prefix some functions with linux_ to avoid namespace conflict 64 * with the OpenSolaris code in the kernel. 65 */ 66 #define kmem_cache linux_kmem_cache 67 #define kmem_cache_create(...) linux_kmem_cache_create(__VA_ARGS__) 68 #define kmem_cache_alloc(...) linux_kmem_cache_alloc(__VA_ARGS__) 69 #define kmem_cache_free(...) linux_kmem_cache_free(__VA_ARGS__) 70 #define kmem_cache_destroy(...) linux_kmem_cache_destroy(__VA_ARGS__) 71 72 #define KMEM_CACHE(__struct, flags) \ 73 linux_kmem_cache_create(#__struct, sizeof(struct __struct), \ 74 __alignof(struct __struct), (flags), NULL) 75 76 typedef void linux_kmem_ctor_t (void *); 77 78 struct linux_kmem_cache { 79 uma_zone_t cache_zone; 80 linux_kmem_ctor_t *cache_ctor; 81 unsigned cache_flags; 82 unsigned cache_size; 83 }; 84 85 #define SLAB_HWCACHE_ALIGN (1 << 0) 86 #define SLAB_TYPESAFE_BY_RCU (1 << 1) 87 #define SLAB_RECLAIM_ACCOUNT (1 << 2) 88 89 #define SLAB_DESTROY_BY_RCU \ 90 SLAB_TYPESAFE_BY_RCU 91 92 #define ARCH_KMALLOC_MINALIGN \ 93 __alignof(unsigned long long) 94 95 /* 96 * Critical section-friendly version of kfree(). 97 * Requires knowledge of the allocation size at build time. 98 */ 99 #define kfree_async(ptr) do { \ 100 _Static_assert(sizeof(*(ptr)) >= sizeof(struct llist_node), \ 101 "Size of object to free is unknown or too small"); \ 102 if (curthread->td_critnest != 0) \ 103 linux_kfree_async(ptr); \ 104 else \ 105 kfree(ptr); \ 106 } while (0) 107 108 static inline gfp_t 109 linux_check_m_flags(gfp_t flags) 110 { 111 const gfp_t m = M_NOWAIT | M_WAITOK; 112 113 /* make sure either M_NOWAIT or M_WAITOK is set */ 114 if ((flags & m) == 0) 115 flags |= M_NOWAIT; 116 else if ((flags & m) == m) 117 flags &= ~M_WAITOK; 118 119 /* mask away LinuxKPI specific flags */ 120 return (flags & GFP_NATIVE_MASK); 121 } 122 123 static inline void * 124 kmalloc(size_t size, gfp_t flags) 125 { 126 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags))); 127 } 128 129 static inline void * 130 kcalloc(size_t n, size_t size, gfp_t flags) 131 { 132 flags |= __GFP_ZERO; 133 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 134 } 135 136 static inline void * 137 __vmalloc(size_t size, gfp_t flags, int other) 138 { 139 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags))); 140 } 141 142 static inline void * 143 vmalloc_32(size_t size) 144 { 145 return (contigmalloc(size, M_KMALLOC, M_WAITOK, 0, UINT_MAX, 1, 1)); 146 } 147 148 static inline void * 149 kmalloc_array(size_t n, size_t size, gfp_t flags) 150 { 151 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 152 } 153 154 static inline void * 155 kvmalloc_array(size_t n, size_t size, gfp_t flags) 156 { 157 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 158 } 159 160 static inline void * 161 krealloc(void *ptr, size_t size, gfp_t flags) 162 { 163 return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags))); 164 } 165 166 static inline void 167 kfree(const void *ptr) 168 { 169 free(__DECONST(void *, ptr), M_KMALLOC); 170 } 171 172 static inline size_t 173 ksize(const void *ptr) 174 { 175 return (malloc_usable_size(ptr)); 176 } 177 178 extern struct linux_kmem_cache *linux_kmem_cache_create(const char *name, 179 size_t size, size_t align, unsigned flags, linux_kmem_ctor_t *ctor); 180 181 static inline void * 182 linux_kmem_cache_alloc(struct linux_kmem_cache *c, gfp_t flags) 183 { 184 return (uma_zalloc_arg(c->cache_zone, c, 185 linux_check_m_flags(flags))); 186 } 187 188 static inline void * 189 kmem_cache_zalloc(struct linux_kmem_cache *c, gfp_t flags) 190 { 191 return (uma_zalloc_arg(c->cache_zone, c, 192 linux_check_m_flags(flags | M_ZERO))); 193 } 194 195 extern void linux_kmem_cache_free_rcu(struct linux_kmem_cache *, void *); 196 197 static inline void 198 linux_kmem_cache_free(struct linux_kmem_cache *c, void *m) 199 { 200 if (unlikely(c->cache_flags & SLAB_TYPESAFE_BY_RCU)) 201 linux_kmem_cache_free_rcu(c, m); 202 else 203 uma_zfree(c->cache_zone, m); 204 } 205 206 extern void linux_kmem_cache_destroy(struct linux_kmem_cache *); 207 void linux_kfree_async(void *); 208 209 #endif /* _LINUX_SLAB_H_ */ 210