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 static inline gfp_t 89 linux_check_m_flags(gfp_t flags) 90 { 91 const gfp_t m = M_NOWAIT | M_WAITOK; 92 93 /* make sure either M_NOWAIT or M_WAITOK is set */ 94 if ((flags & m) == 0) 95 flags |= M_NOWAIT; 96 else if ((flags & m) == m) 97 flags &= ~M_WAITOK; 98 99 /* mask away LinuxKPI specific flags */ 100 return (flags & GFP_NATIVE_MASK); 101 } 102 103 static inline void * 104 kmalloc(size_t size, gfp_t flags) 105 { 106 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags))); 107 } 108 109 static inline void * 110 kcalloc(size_t n, size_t size, gfp_t flags) 111 { 112 flags |= __GFP_ZERO; 113 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 114 } 115 116 static inline void * 117 __vmalloc(size_t size, gfp_t flags, int other) 118 { 119 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags))); 120 } 121 122 static inline void * 123 vmalloc_32(size_t size) 124 { 125 return (contigmalloc(size, M_KMALLOC, M_WAITOK, 0, UINT_MAX, 1, 1)); 126 } 127 128 static inline void * 129 kmalloc_array(size_t n, size_t size, gfp_t flags) 130 { 131 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 132 } 133 134 static inline void * 135 krealloc(void *ptr, size_t size, gfp_t flags) 136 { 137 return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags))); 138 } 139 140 static inline void 141 kfree(const void *ptr) 142 { 143 free(__DECONST(void *, ptr), M_KMALLOC); 144 } 145 146 extern struct linux_kmem_cache *linux_kmem_cache_create(const char *name, 147 size_t size, size_t align, unsigned flags, linux_kmem_ctor_t *ctor); 148 149 static inline void * 150 linux_kmem_cache_alloc(struct linux_kmem_cache *c, gfp_t flags) 151 { 152 return (uma_zalloc_arg(c->cache_zone, c, 153 linux_check_m_flags(flags))); 154 } 155 156 static inline void * 157 kmem_cache_zalloc(struct linux_kmem_cache *c, gfp_t flags) 158 { 159 return (uma_zalloc_arg(c->cache_zone, c, 160 linux_check_m_flags(flags | M_ZERO))); 161 } 162 163 extern void linux_kmem_cache_free_rcu(struct linux_kmem_cache *, void *); 164 165 static inline void 166 linux_kmem_cache_free(struct linux_kmem_cache *c, void *m) 167 { 168 if (unlikely(c->cache_flags & SLAB_TYPESAFE_BY_RCU)) 169 linux_kmem_cache_free_rcu(c, m); 170 else 171 uma_zfree(c->cache_zone, m); 172 } 173 174 extern void linux_kmem_cache_destroy(struct linux_kmem_cache *); 175 176 #endif /* _LINUX_SLAB_H_ */ 177