1 /* 2 * Copyright (c) 2015-2020 François Tigeot <ftigeot@wolfpond.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _LINUX_SLAB_H_ 28 #define _LINUX_SLAB_H_ 29 30 #include <linux/gfp.h> 31 #include <linux/types.h> 32 33 MALLOC_DECLARE(M_DRM); 34 35 #define kzalloc(size, flags) kmalloc(size, M_DRM, flags | M_ZERO) 36 37 #undef kfree 38 #define kfree(ptr) do { \ 39 if (ptr != NULL) \ 40 _kfree((void *)ptr, M_DRM); \ 41 } while (0) 42 43 #define kcalloc(n, size, flags) kzalloc((n) * (size), flags) 44 45 static inline void * 46 kmalloc_array(size_t n, size_t size, gfp_t flags) 47 { 48 return kmalloc(n * size, M_DRM, flags); 49 } 50 51 #include <linux/kasan.h> 52 53 struct kmem_cache { 54 unsigned int size; 55 }; 56 57 #define SLAB_HWCACHE_ALIGN 0x01UL 58 #define SLAB_RECLAIM_ACCOUNT 0x02UL 59 #define SLAB_TYPESAFE_BY_RCU 0x04UL 60 61 #define KMEM_CACHE(__struct, flags) \ 62 kmem_cache_create(#__struct, sizeof(struct __struct), \ 63 __alignof(struct __struct), (flags), NULL) 64 65 static inline struct kmem_cache * 66 kmem_cache_create(const char *name, size_t size, size_t align, 67 unsigned long flags, void (*ctor)(void *)) 68 { 69 struct kmem_cache *kc; 70 71 kc = kzalloc(sizeof(struct kmem_cache), flags); 72 kc->size = size; 73 74 return kc; 75 } 76 77 static inline void 78 kmem_cache_destroy(struct kmem_cache *kc) 79 { 80 kfree(kc); 81 } 82 83 static inline void * 84 kmem_cache_alloc(struct kmem_cache *kc, gfp_t flags) 85 { 86 return kmalloc(kc->size, M_DRM, flags); 87 } 88 89 static inline void * 90 kmem_cache_zalloc(struct kmem_cache *kc, gfp_t flags) 91 { 92 return kzalloc(kc->size, flags); 93 } 94 95 static inline void 96 kmem_cache_free(struct kmem_cache *kc, void *ptr) 97 { 98 kfree(ptr); 99 } 100 101 #endif /* _LINUX_SLAB_H_ */ 102