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_DESTROY_BY_RCU (1 << 1) 83 #define SLAB_RECLAIM_ACCOUNT (1 << 2) 84 85 static inline gfp_t 86 linux_check_m_flags(gfp_t flags) 87 { 88 const gfp_t m = M_NOWAIT | M_WAITOK; 89 90 /* make sure either M_NOWAIT or M_WAITOK is set */ 91 if ((flags & m) == 0) 92 flags |= M_NOWAIT; 93 else if ((flags & m) == m) 94 flags &= ~M_WAITOK; 95 96 /* mask away LinuxKPI specific flags */ 97 return (flags & GFP_NATIVE_MASK); 98 } 99 100 static inline void * 101 kmalloc(size_t size, gfp_t flags) 102 { 103 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags))); 104 } 105 106 static inline void * 107 kcalloc(size_t n, size_t size, gfp_t flags) 108 { 109 flags |= __GFP_ZERO; 110 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 111 } 112 113 static inline void * 114 __vmalloc(size_t size, gfp_t flags, int other) 115 { 116 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags))); 117 } 118 119 static inline void * 120 vmalloc_32(size_t size) 121 { 122 return (contigmalloc(size, M_KMALLOC, M_WAITOK, 0, UINT_MAX, 1, 1)); 123 } 124 125 static inline void * 126 kmalloc_array(size_t n, size_t size, gfp_t flags) 127 { 128 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 129 } 130 131 static inline void * 132 krealloc(void *ptr, size_t size, gfp_t flags) 133 { 134 return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags))); 135 } 136 137 static inline void 138 kfree(const void *ptr) 139 { 140 free(__DECONST(void *, ptr), M_KMALLOC); 141 } 142 143 extern struct linux_kmem_cache *linux_kmem_cache_create(const char *name, 144 size_t size, size_t align, unsigned flags, linux_kmem_ctor_t *ctor); 145 146 static inline void * 147 linux_kmem_cache_alloc(struct linux_kmem_cache *c, gfp_t flags) 148 { 149 return (uma_zalloc_arg(c->cache_zone, c, 150 linux_check_m_flags(flags))); 151 } 152 153 static inline void * 154 kmem_cache_zalloc(struct linux_kmem_cache *c, gfp_t flags) 155 { 156 return (uma_zalloc_arg(c->cache_zone, c, 157 linux_check_m_flags(flags | M_ZERO))); 158 } 159 160 extern void linux_kmem_cache_free_rcu(struct linux_kmem_cache *, void *); 161 162 static inline void 163 linux_kmem_cache_free(struct linux_kmem_cache *c, void *m) 164 { 165 if (unlikely(c->cache_flags & SLAB_DESTROY_BY_RCU)) 166 linux_kmem_cache_free_rcu(c, m); 167 else 168 uma_zfree(c->cache_zone, m); 169 } 170 171 extern void linux_kmem_cache_destroy(struct linux_kmem_cache *); 172 173 #endif /* _LINUX_SLAB_H_ */ 174