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_HIGH 0 51 #define __GFP_RETRY_MAYFAIL 0 52 #define __GFP_MOVABLE 0 53 #define __GFP_COMP 0 54 #define __GFP_KSWAPD_RECLAIM 0 55 56 #define __GFP_IO 0 57 #define __GFP_NO_KSWAPD 0 58 #define __GFP_KSWAPD_RECLAIM 0 59 #define __GFP_ACCOUNT 0 60 #define __GFP_WAIT M_WAITOK 61 #define __GFP_DMA32 (1U << 24) /* LinuxKPI only */ 62 #define __GFP_NORETRY (1U << 25) /* LinuxKPI only */ 63 #define __GFP_THISNODE (1U << 26) 64 #define __GFP_BITS_SHIFT 27 65 #define __GFP_BITS_MASK ((1 << __GFP_BITS_SHIFT) - 1) 66 #define __GFP_NOFAIL M_WAITOK 67 68 #define GFP_NOWAIT M_NOWAIT 69 #define GFP_ATOMIC (M_NOWAIT | M_USE_RESERVE) 70 #define GFP_KERNEL M_WAITOK 71 #define GFP_KERNEL_ACCOUNT (GFP_KERNEL | __GFP_ACCOUNT) 72 #define GFP_USER M_WAITOK 73 #define GFP_HIGHUSER M_WAITOK 74 #define GFP_HIGHUSER_MOVABLE M_WAITOK 75 #define GFP_IOFS M_NOWAIT 76 #define GFP_NOIO M_NOWAIT 77 #define GFP_NOFS M_NOWAIT 78 #define GFP_DMA32 __GFP_DMA32 79 #define GFP_TEMPORARY M_NOWAIT 80 #define GFP_NATIVE_MASK (M_NOWAIT | M_WAITOK | M_USE_RESERVE | M_ZERO) 81 #define GFP_TRANSHUGE 0 82 #define GFP_TRANSHUGE_LIGHT 0 83 84 CTASSERT((__GFP_DMA32 & GFP_NATIVE_MASK) == 0); 85 CTASSERT((__GFP_BITS_MASK & GFP_NATIVE_MASK) == GFP_NATIVE_MASK); 86 87 #define __default_gfp(_discard, _arg_or_default, ...) _arg_or_default 88 #define default_gfp(...) __default_gfp(, ##__VA_ARGS__, GFP_KERNEL) 89 90 struct page_frag_cache { 91 void *va; 92 int pagecnt_bias; 93 }; 94 95 /* 96 * Page management for unmapped pages: 97 */ 98 struct page *linux_alloc_pages(gfp_t flags, unsigned int order); 99 void linux_free_pages(struct page *page, unsigned int order); 100 void *linuxkpi_page_frag_alloc(struct page_frag_cache *, size_t, gfp_t); 101 void linuxkpi_page_frag_free(void *); 102 void linuxkpi__page_frag_cache_drain(struct page *, size_t); 103 104 static inline struct page * 105 alloc_page(gfp_t flags) 106 { 107 108 return (linux_alloc_pages(flags, 0)); 109 } 110 111 static inline struct page * 112 alloc_pages(gfp_t flags, unsigned int order) 113 { 114 115 return (linux_alloc_pages(flags, order)); 116 } 117 118 static inline struct page * 119 alloc_pages_node(int node_id, gfp_t flags, unsigned int order) 120 { 121 122 return (linux_alloc_pages(flags, order)); 123 } 124 125 static inline void 126 __free_pages(struct page *page, unsigned int order) 127 { 128 129 linux_free_pages(page, order); 130 } 131 132 static inline void 133 __free_page(struct page *page) 134 { 135 136 linux_free_pages(page, 0); 137 } 138 139 static inline struct page * 140 dev_alloc_pages(unsigned int order) 141 { 142 return (linux_alloc_pages(GFP_ATOMIC, order)); 143 } 144 145 struct folio *folio_alloc(gfp_t gfp, unsigned int order); 146 147 /* 148 * Page management for mapped pages: 149 */ 150 vm_offset_t linux_alloc_kmem(gfp_t flags, unsigned int order); 151 void linux_free_kmem(vm_offset_t, unsigned int order); 152 153 static inline vm_offset_t 154 get_zeroed_page(gfp_t flags) 155 { 156 157 return (linux_alloc_kmem(flags | __GFP_ZERO, 0)); 158 } 159 160 static inline vm_offset_t 161 __get_free_page(gfp_t flags) 162 { 163 164 return (linux_alloc_kmem(flags, 0)); 165 } 166 167 static inline vm_offset_t 168 __get_free_pages(gfp_t flags, unsigned int order) 169 { 170 171 return (linux_alloc_kmem(flags, order)); 172 } 173 174 static inline void 175 free_pages(uintptr_t addr, unsigned int order) 176 { 177 if (addr == 0) 178 return; 179 180 linux_free_kmem(addr, order); 181 } 182 183 static inline void 184 free_page(uintptr_t addr) 185 { 186 if (addr == 0) 187 return; 188 189 linux_free_kmem(addr, 0); 190 } 191 192 static inline void * 193 page_frag_alloc(struct page_frag_cache *pfc, size_t fragsz, gfp_t gfp) 194 { 195 196 return (linuxkpi_page_frag_alloc(pfc, fragsz, gfp)); 197 } 198 199 static inline void 200 page_frag_free(void *addr) 201 { 202 203 linuxkpi_page_frag_free(addr); 204 } 205 206 static inline void 207 __page_frag_cache_drain(struct page *page, size_t count) 208 { 209 210 linuxkpi__page_frag_cache_drain(page, count); 211 } 212 213 static inline bool 214 gfpflags_allow_blocking(const gfp_t gfp_flags) 215 { 216 return ((gfp_flags & (M_WAITOK | M_NOWAIT)) == M_WAITOK); 217 } 218 219 #define SetPageReserved(page) do { } while (0) /* NOP */ 220 #define ClearPageReserved(page) do { } while (0) /* NOP */ 221 222 #endif /* _LINUXKPI_LINUX_GFP_H_ */ 223