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: stable/11/sys/compat/linuxkpi/common/include/linux/slab.h 345930 2019-04-05 11:26:33Z hselasky $ 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 43MALLOC_DECLARE(M_KMALLOC); 44 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(size, (flags) | __GFP_ZERO) 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(size, GFP_KERNEL, 0) 55#define vmalloc_user(size) __vmalloc(size, GFP_KERNEL | __GFP_ZERO, 0) 56#define vmalloc(size) __vmalloc(size, GFP_KERNEL, 0) 57#define __kmalloc(...) kmalloc(__VA_ARGS__) 58#define kmalloc_node(chunk, flags, n) kmalloc(chunk, flags) 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(...) linux_kmem_cache_alloc(__VA_ARGS__) 67#define kmem_cache_free(...) linux_kmem_cache_free(__VA_ARGS__) 68#define kmem_cache_destroy(...) linux_kmem_cache_destroy(__VA_ARGS__) 69 70#define KMEM_CACHE(__struct, flags) \ 71 linux_kmem_cache_create(#__struct, sizeof(struct __struct), \ 72 __alignof(struct __struct), (flags), NULL) 73 74typedef void linux_kmem_ctor_t (void *); 75 76struct linux_kmem_cache { 77 uma_zone_t cache_zone; 78 linux_kmem_ctor_t *cache_ctor; 79 unsigned cache_flags; 80 unsigned cache_size; 81}; 82 83#define SLAB_HWCACHE_ALIGN (1 << 0) 84#define SLAB_TYPESAFE_BY_RCU (1 << 1) 85#define SLAB_RECLAIM_ACCOUNT (1 << 2) 86 87#define SLAB_DESTROY_BY_RCU \ 88 SLAB_TYPESAFE_BY_RCU 89 90#define ARCH_KMALLOC_MINALIGN \ 91 __alignof(unsigned long long) 92 93static inline gfp_t 94linux_check_m_flags(gfp_t flags) 95{ 96 const gfp_t m = M_NOWAIT | M_WAITOK; 97 98 /* make sure either M_NOWAIT or M_WAITOK is set */ 99 if ((flags & m) == 0) 100 flags |= M_NOWAIT; 101 else if ((flags & m) == m) 102 flags &= ~M_WAITOK; 103 104 /* mask away LinuxKPI specific flags */ 105 return (flags & GFP_NATIVE_MASK); 106} 107 108static inline void * 109kmalloc(size_t size, gfp_t flags) 110{ 111 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags))); 112} 113 114static inline void * 115kcalloc(size_t n, size_t size, gfp_t flags) 116{ 117 flags |= __GFP_ZERO; 118 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 119} 120 121static inline void * 122__vmalloc(size_t size, gfp_t flags, int other) 123{ 124 return (malloc(size, M_KMALLOC, linux_check_m_flags(flags))); 125} 126 127static inline void * 128vmalloc_32(size_t size) 129{ 130 return (contigmalloc(size, M_KMALLOC, M_WAITOK, 0, UINT_MAX, 1, 1)); 131} 132 133static inline void * 134kmalloc_array(size_t n, size_t size, gfp_t flags) 135{ 136 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 137} 138 139static inline void * 140kvmalloc_array(size_t n, size_t size, gfp_t flags) 141{ 142 return (mallocarray(n, size, M_KMALLOC, linux_check_m_flags(flags))); 143} 144 145static inline void * 146krealloc(void *ptr, size_t size, gfp_t flags) 147{ 148 return (realloc(ptr, size, M_KMALLOC, linux_check_m_flags(flags))); 149} 150 151static inline void 152kfree(const void *ptr) 153{ 154 free(__DECONST(void *, ptr), M_KMALLOC); 155} 156 157extern struct linux_kmem_cache *linux_kmem_cache_create(const char *name, 158 size_t size, size_t align, unsigned flags, linux_kmem_ctor_t *ctor); 159 160static inline void * 161linux_kmem_cache_alloc(struct linux_kmem_cache *c, gfp_t flags) 162{ 163 return (uma_zalloc_arg(c->cache_zone, c, 164 linux_check_m_flags(flags))); 165} 166 167static inline void * 168kmem_cache_zalloc(struct linux_kmem_cache *c, gfp_t flags) 169{ 170 return (uma_zalloc_arg(c->cache_zone, c, 171 linux_check_m_flags(flags | M_ZERO))); 172} 173 174extern void linux_kmem_cache_free_rcu(struct linux_kmem_cache *, void *); 175 176static inline void 177linux_kmem_cache_free(struct linux_kmem_cache *c, void *m) 178{ 179 if (unlikely(c->cache_flags & SLAB_TYPESAFE_BY_RCU)) 180 linux_kmem_cache_free_rcu(c, m); 181 else 182 uma_zfree(c->cache_zone, m); 183} 184 185extern void linux_kmem_cache_destroy(struct linux_kmem_cache *); 186 187#endif /* _LINUX_SLAB_H_ */ 188