1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2021 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 _LINUXKPI_LINUX_SLAB_H_ 32 #define _LINUXKPI_LINUX_SLAB_H_ 33 34 #include <sys/types.h> 35 #include <sys/malloc.h> 36 #include <sys/limits.h> 37 38 #include <linux/compat.h> 39 #include <linux/types.h> 40 #include <linux/gfp.h> 41 #include <linux/llist.h> 42 #include <linux/overflow.h> 43 44 MALLOC_DECLARE(M_KMALLOC); 45 46 #define kvmalloc(size, flags) kmalloc(size, flags) 47 #define kvzalloc(size, flags) kmalloc(size, (flags) | __GFP_ZERO) 48 #define kvcalloc(n, size, flags) kvmalloc_array(n, size, (flags) | __GFP_ZERO) 49 #define kzalloc(size, flags) kmalloc(size, (flags) | __GFP_ZERO) 50 #define kzalloc_node(size, flags, node) kmalloc_node(size, (flags) | __GFP_ZERO, node) 51 #define kfree_const(ptr) kfree(ptr) 52 #define vzalloc(size) __vmalloc(size, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO, 0) 53 #define vfree(arg) kfree(arg) 54 #define kvfree(arg) kfree(arg) 55 #define vmalloc_node(size, node) __vmalloc_node(size, GFP_KERNEL, node) 56 #define vmalloc_user(size) __vmalloc(size, GFP_KERNEL | __GFP_ZERO, 0) 57 #define vmalloc(size) __vmalloc(size, GFP_KERNEL, 0) 58 #define __kmalloc(...) kmalloc(__VA_ARGS__) 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(...) lkpi_kmem_cache_alloc(__VA_ARGS__) 67 #define kmem_cache_zalloc(...) lkpi_kmem_cache_zalloc(__VA_ARGS__) 68 #define kmem_cache_free(...) lkpi_kmem_cache_free(__VA_ARGS__) 69 #define kmem_cache_destroy(...) linux_kmem_cache_destroy(__VA_ARGS__) 70 71 #define KMEM_CACHE(__struct, flags) \ 72 linux_kmem_cache_create(#__struct, sizeof(struct __struct), \ 73 __alignof(struct __struct), (flags), NULL) 74 75 typedef void linux_kmem_ctor_t (void *); 76 77 struct linux_kmem_cache; 78 79 #define SLAB_HWCACHE_ALIGN (1 << 0) 80 #define SLAB_TYPESAFE_BY_RCU (1 << 1) 81 #define SLAB_RECLAIM_ACCOUNT (1 << 2) 82 83 #define SLAB_DESTROY_BY_RCU \ 84 SLAB_TYPESAFE_BY_RCU 85 86 #define ARCH_KMALLOC_MINALIGN \ 87 __alignof(unsigned long long) 88 89 /* drm-kmod 5.4 compat */ 90 #define kfree_async(ptr) kfree(ptr); 91 92 static inline gfp_t 93 linux_check_m_flags(gfp_t flags) 94 { 95 const gfp_t m = M_NOWAIT | M_WAITOK; 96 97 /* make sure either M_NOWAIT or M_WAITOK is set */ 98 if ((flags & m) == 0) 99 flags |= M_NOWAIT; 100 else if ((flags & m) == m) 101 flags &= ~M_WAITOK; 102 103 /* mask away LinuxKPI specific flags */ 104 return (flags & GFP_NATIVE_MASK); 105 } 106 107 static inline void * 108 kmalloc(size_t size, gfp_t flags) 109 { 110 return (malloc(MAX(size, sizeof(struct llist_node)), M_KMALLOC, 111 linux_check_m_flags(flags))); 112 } 113 114 static inline void * 115 kmalloc_node(size_t size, gfp_t flags, int node) 116 { 117 return (malloc_domainset(size, M_KMALLOC, 118 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 119 } 120 121 static inline void * 122 kcalloc(size_t n, size_t size, gfp_t flags) 123 { 124 flags |= __GFP_ZERO; 125 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 126 } 127 128 static inline void * 129 kcalloc_node(size_t n, size_t size, gfp_t flags, int node) 130 { 131 flags |= __GFP_ZERO; 132 return (mallocarray_domainset(n, size, M_KMALLOC, 133 linux_get_vm_domain_set(node), 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_node(size_t size, gfp_t flags, int node) 144 { 145 return (malloc_domainset(size, M_KMALLOC, 146 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 147 } 148 149 static inline void * 150 vmalloc_32(size_t size) 151 { 152 return (contigmalloc(size, M_KMALLOC, M_WAITOK, 0, UINT_MAX, 1, 1)); 153 } 154 155 static inline void * 156 kmalloc_array(size_t n, size_t size, gfp_t flags) 157 { 158 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 159 } 160 161 static inline void * 162 kmalloc_array_node(size_t n, size_t size, gfp_t flags, int node) 163 { 164 return (mallocarray_domainset(n, size, M_KMALLOC, 165 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 166 } 167 168 static inline void * 169 kvmalloc_array(size_t n, size_t size, gfp_t flags) 170 { 171 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 172 } 173 174 static inline void * 175 krealloc(void *ptr, size_t size, gfp_t flags) 176 { 177 return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags))); 178 } 179 180 extern void linux_kfree_async(void *); 181 182 static inline void 183 kfree(const void *ptr) 184 { 185 if (curthread->td_critnest != 0) 186 linux_kfree_async(__DECONST(void *, ptr)); 187 else 188 free(__DECONST(void *, ptr), M_KMALLOC); 189 } 190 191 static __inline void 192 kfree_sensitive(const void *ptr) 193 { 194 zfree(__DECONST(void *, ptr), M_KMALLOC); 195 } 196 197 static inline size_t 198 ksize(const void *ptr) 199 { 200 return (malloc_usable_size(ptr)); 201 } 202 203 extern struct linux_kmem_cache *linux_kmem_cache_create(const char *name, 204 size_t size, size_t align, unsigned flags, linux_kmem_ctor_t *ctor); 205 extern void *lkpi_kmem_cache_alloc(struct linux_kmem_cache *, gfp_t); 206 extern void *lkpi_kmem_cache_zalloc(struct linux_kmem_cache *, gfp_t); 207 extern void lkpi_kmem_cache_free(struct linux_kmem_cache *, void *); 208 extern void linux_kmem_cache_destroy(struct linux_kmem_cache *); 209 210 #endif /* _LINUXKPI_LINUX_SLAB_H_ */ 211