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 #ifndef _LINUXKPI_LINUX_GFP_H_ 30 #define _LINUXKPI_LINUX_GFP_H_ 31 32 #include <sys/types.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 36 #include <linux/page.h> 37 #include <linux/topology.h> 38 39 #include <vm/vm_param.h> 40 #include <vm/vm_object.h> 41 #include <vm/vm_extern.h> 42 #include <vm/vm_kern.h> 43 44 #define __GFP_NOWARN 0 45 #define __GFP_HIGHMEM 0 46 #define __GFP_ZERO M_ZERO 47 #define __GFP_NOMEMALLOC 0 48 #define __GFP_RECLAIM 0 49 #define __GFP_RECLAIMABLE 0 50 #define __GFP_RETRY_MAYFAIL 0 51 #define __GFP_MOVABLE 0 52 #define __GFP_COMP 0 53 #define __GFP_KSWAPD_RECLAIM 0 54 55 #define __GFP_IO 0 56 #define __GFP_NO_KSWAPD 0 57 #define __GFP_KSWAPD_RECLAIM 0 58 #define __GFP_WAIT M_WAITOK 59 #define __GFP_DMA32 (1U << 24) /* LinuxKPI only */ 60 #define __GFP_NORETRY (1U << 25) /* LinuxKPI only */ 61 #define __GFP_BITS_SHIFT 26 62 #define __GFP_BITS_MASK ((1 << __GFP_BITS_SHIFT) - 1) 63 #define __GFP_NOFAIL M_WAITOK 64 65 #define GFP_NOWAIT M_NOWAIT 66 #define GFP_ATOMIC (M_NOWAIT | M_USE_RESERVE) 67 #define GFP_KERNEL M_WAITOK 68 #define GFP_USER M_WAITOK 69 #define GFP_HIGHUSER M_WAITOK 70 #define GFP_HIGHUSER_MOVABLE M_WAITOK 71 #define GFP_IOFS M_NOWAIT 72 #define GFP_NOIO M_NOWAIT 73 #define GFP_NOFS M_NOWAIT 74 #define GFP_DMA32 __GFP_DMA32 75 #define GFP_TEMPORARY M_NOWAIT 76 #define GFP_NATIVE_MASK (M_NOWAIT | M_WAITOK | M_USE_RESERVE | M_ZERO) 77 #define GFP_TRANSHUGE 0 78 #define GFP_TRANSHUGE_LIGHT 0 79 80 CTASSERT((__GFP_DMA32 & GFP_NATIVE_MASK) == 0); 81 CTASSERT((__GFP_BITS_MASK & GFP_NATIVE_MASK) == GFP_NATIVE_MASK); 82 83 #define __default_gfp(_discard, _arg_or_default, ...) _arg_or_default 84 #define default_gfp(...) __default_gfp(, ##__VA_ARGS__, GFP_KERNEL) 85 86 struct page_frag_cache { 87 void *va; 88 int pagecnt_bias; 89 }; 90 91 /* 92 * Page management for unmapped pages: 93 */ 94 struct page *linux_alloc_pages(gfp_t flags, unsigned int order); 95 void linux_free_pages(struct page *page, unsigned int order); 96 void *linuxkpi_page_frag_alloc(struct page_frag_cache *, size_t, gfp_t); 97 void linuxkpi_page_frag_free(void *); 98 void linuxkpi__page_frag_cache_drain(struct page *, size_t); 99 100 static inline struct page * 101 alloc_page(gfp_t flags) 102 { 103 104 return (linux_alloc_pages(flags, 0)); 105 } 106 107 static inline struct page * 108 alloc_pages(gfp_t flags, unsigned int order) 109 { 110 111 return (linux_alloc_pages(flags, order)); 112 } 113 114 static inline struct page * 115 alloc_pages_node(int node_id, gfp_t flags, unsigned int order) 116 { 117 118 return (linux_alloc_pages(flags, order)); 119 } 120 121 static inline void 122 __free_pages(struct page *page, unsigned int order) 123 { 124 125 linux_free_pages(page, order); 126 } 127 128 static inline void 129 __free_page(struct page *page) 130 { 131 132 linux_free_pages(page, 0); 133 } 134 135 static inline struct page * 136 dev_alloc_pages(unsigned int order) 137 { 138 return (linux_alloc_pages(GFP_ATOMIC, order)); 139 } 140 141 struct folio *folio_alloc(gfp_t gfp, unsigned int order); 142 143 /* 144 * Page management for mapped pages: 145 */ 146 vm_offset_t linux_alloc_kmem(gfp_t flags, unsigned int order); 147 void linux_free_kmem(vm_offset_t, unsigned int order); 148 149 static inline vm_offset_t 150 get_zeroed_page(gfp_t flags) 151 { 152 153 return (linux_alloc_kmem(flags | __GFP_ZERO, 0)); 154 } 155 156 static inline vm_offset_t 157 __get_free_page(gfp_t flags) 158 { 159 160 return (linux_alloc_kmem(flags, 0)); 161 } 162 163 static inline vm_offset_t 164 __get_free_pages(gfp_t flags, unsigned int order) 165 { 166 167 return (linux_alloc_kmem(flags, order)); 168 } 169 170 static inline void 171 free_pages(uintptr_t addr, unsigned int order) 172 { 173 if (addr == 0) 174 return; 175 176 linux_free_kmem(addr, order); 177 } 178 179 static inline void 180 free_page(uintptr_t addr) 181 { 182 if (addr == 0) 183 return; 184 185 linux_free_kmem(addr, 0); 186 } 187 188 static inline void * 189 page_frag_alloc(struct page_frag_cache *pfc, size_t fragsz, gfp_t gfp) 190 { 191 192 return (linuxkpi_page_frag_alloc(pfc, fragsz, gfp)); 193 } 194 195 static inline void 196 page_frag_free(void *addr) 197 { 198 199 linuxkpi_page_frag_free(addr); 200 } 201 202 static inline void 203 __page_frag_cache_drain(struct page *page, size_t count) 204 { 205 206 linuxkpi__page_frag_cache_drain(page, count); 207 } 208 209 static inline bool 210 gfpflags_allow_blocking(const gfp_t gfp_flags) 211 { 212 return ((gfp_flags & (M_WAITOK | M_NOWAIT)) == M_WAITOK); 213 } 214 215 #define SetPageReserved(page) do { } while (0) /* NOP */ 216 #define ClearPageReserved(page) do { } while (0) /* NOP */ 217 218 #endif /* _LINUXKPI_LINUX_GFP_H_ */ 219