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 #ifndef _LINUXKPI_LINUX_SLAB_H_ 30 #define _LINUXKPI_LINUX_SLAB_H_ 31 32 #include <sys/types.h> 33 #include <sys/malloc.h> 34 #include <sys/limits.h> 35 36 #include <linux/compat.h> 37 #include <linux/types.h> 38 #include <linux/gfp.h> 39 #include <linux/llist.h> 40 #include <linux/overflow.h> 41 42 MALLOC_DECLARE(M_KMALLOC); 43 44 #define kmalloc(size, flags) lkpi_kmalloc(size, flags) 45 #define kvmalloc(size, flags) kmalloc(size, flags) 46 #define kvzalloc(size, flags) kmalloc(size, (flags) | __GFP_ZERO) 47 #define kvcalloc(n, size, flags) kvmalloc_array(n, size, (flags) | __GFP_ZERO) 48 #define kzalloc(size, flags) kmalloc(size, (flags) | __GFP_ZERO) 49 #define kzalloc_node(size, flags, node) kmalloc_node(size, (flags) | __GFP_ZERO, node) 50 #define kfree_const(ptr) kfree(ptr) 51 #define vzalloc(size) __vmalloc(size, GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO, 0) 52 #define vfree(arg) kfree(arg) 53 #define kvfree(arg) kfree(arg) 54 #define vmalloc_node(size, node) __vmalloc_node(size, GFP_KERNEL, node) 55 #define vmalloc_user(size) __vmalloc(size, GFP_KERNEL | __GFP_ZERO, 0) 56 #define vmalloc(size) __vmalloc(size, GFP_KERNEL, 0) 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(...) lkpi_kmem_cache_alloc(__VA_ARGS__) 65 #define kmem_cache_zalloc(...) lkpi_kmem_cache_zalloc(__VA_ARGS__) 66 #define kmem_cache_free(...) lkpi_kmem_cache_free(__VA_ARGS__) 67 #define kmem_cache_destroy(...) linux_kmem_cache_destroy(__VA_ARGS__) 68 #define kmem_cache_shrink(x) (0) 69 70 #define KMEM_CACHE(__struct, flags) \ 71 linux_kmem_cache_create(#__struct, sizeof(struct __struct), \ 72 __alignof(struct __struct), (flags), NULL) 73 74 typedef void linux_kmem_ctor_t (void *); 75 76 struct linux_kmem_cache; 77 78 #define SLAB_HWCACHE_ALIGN (1 << 0) 79 #define SLAB_TYPESAFE_BY_RCU (1 << 1) 80 #define SLAB_RECLAIM_ACCOUNT (1 << 2) 81 82 #define SLAB_DESTROY_BY_RCU \ 83 SLAB_TYPESAFE_BY_RCU 84 85 #define ARCH_KMALLOC_MINALIGN \ 86 __alignof(unsigned long long) 87 88 /* drm-kmod 5.4 compat */ 89 #define kfree_async(ptr) kfree(ptr); 90 91 #define ZERO_SIZE_PTR ((void *)16) 92 #define ZERO_OR_NULL_PTR(x) ((x) == NULL || (x) == ZERO_SIZE_PTR) 93 94 static inline gfp_t 95 linux_check_m_flags(gfp_t flags) 96 { 97 const gfp_t m = M_NOWAIT | M_WAITOK; 98 99 /* make sure either M_NOWAIT or M_WAITOK is set */ 100 if ((flags & m) == 0) 101 flags |= M_NOWAIT; 102 else if ((flags & m) == m) 103 flags &= ~M_WAITOK; 104 105 /* mask away LinuxKPI specific flags */ 106 return (flags & GFP_NATIVE_MASK); 107 } 108 109 static inline void * 110 __kmalloc(size_t size, gfp_t flags) 111 { 112 return (malloc(MAX(size, sizeof(struct llist_node)), M_KMALLOC, 113 linux_check_m_flags(flags))); 114 } 115 116 static inline void * 117 kmalloc_node(size_t size, gfp_t flags, int node) 118 { 119 return (malloc_domainset(size, M_KMALLOC, 120 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 121 } 122 123 static inline void * 124 kcalloc(size_t n, size_t size, gfp_t flags) 125 { 126 flags |= __GFP_ZERO; 127 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 128 } 129 130 static inline void * 131 kcalloc_node(size_t n, size_t size, gfp_t flags, int node) 132 { 133 flags |= __GFP_ZERO; 134 return (mallocarray_domainset(n, size, M_KMALLOC, 135 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 136 } 137 138 static inline void * 139 __vmalloc(size_t size, gfp_t flags, int other) 140 { 141 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags))); 142 } 143 144 static inline void * 145 __vmalloc_node(size_t size, gfp_t flags, int node) 146 { 147 return (malloc_domainset(size, M_KMALLOC, 148 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 149 } 150 151 static inline void * 152 vmalloc_32(size_t size) 153 { 154 return (contigmalloc(size, M_KMALLOC, M_WAITOK, 0, UINT_MAX, 1, 1)); 155 } 156 157 static inline void * 158 kmalloc_array(size_t n, size_t size, gfp_t flags) 159 { 160 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 161 } 162 163 static inline void * 164 kmalloc_array_node(size_t n, size_t size, gfp_t flags, int node) 165 { 166 return (mallocarray_domainset(n, size, M_KMALLOC, 167 linux_get_vm_domain_set(node), linux_check_m_flags(flags))); 168 } 169 170 static inline void * 171 kvmalloc_array(size_t n, size_t size, gfp_t flags) 172 { 173 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 174 } 175 176 static inline void * 177 krealloc(void *ptr, size_t size, gfp_t flags) 178 { 179 return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags))); 180 } 181 182 static inline void * 183 krealloc_array(void *ptr, size_t n, size_t size, gfp_t flags) 184 { 185 if (WOULD_OVERFLOW(n, size)) { 186 return NULL; 187 } 188 189 return (realloc(ptr, n * size, M_KMALLOC, linux_check_m_flags(flags))); 190 } 191 192 extern void linux_kfree_async(void *); 193 194 static inline void 195 kfree(const void *ptr) 196 { 197 if (ZERO_OR_NULL_PTR(ptr)) 198 return; 199 200 if (curthread->td_critnest != 0) 201 linux_kfree_async(__DECONST(void *, ptr)); 202 else 203 free(__DECONST(void *, ptr), M_KMALLOC); 204 } 205 206 static __inline void 207 kfree_sensitive(const void *ptr) 208 { 209 if (ZERO_OR_NULL_PTR(ptr)) 210 return; 211 212 zfree(__DECONST(void *, ptr), M_KMALLOC); 213 } 214 215 static inline size_t 216 ksize(const void *ptr) 217 { 218 return (malloc_usable_size(ptr)); 219 } 220 221 extern void *lkpi_kmalloc(size_t size, gfp_t flags); 222 extern struct linux_kmem_cache *linux_kmem_cache_create(const char *name, 223 size_t size, size_t align, unsigned flags, linux_kmem_ctor_t *ctor); 224 extern void *lkpi_kmem_cache_alloc(struct linux_kmem_cache *, gfp_t); 225 extern void *lkpi_kmem_cache_zalloc(struct linux_kmem_cache *, gfp_t); 226 extern void lkpi_kmem_cache_free(struct linux_kmem_cache *, void *); 227 extern void linux_kmem_cache_destroy(struct linux_kmem_cache *); 228 229 #endif /* _LINUXKPI_LINUX_SLAB_H_ */ 230