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