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 * $FreeBSD$ 30 */ 31 #ifndef _LINUXKPI_LINUX_GFP_H_ 32 #define _LINUXKPI_LINUX_GFP_H_ 33 34 #include <sys/cdefs.h> 35 #include <sys/types.h> 36 #include <sys/systm.h> 37 #include <sys/malloc.h> 38 39 #include <linux/page.h> 40 41 #include <vm/vm_param.h> 42 #include <vm/vm_object.h> 43 #include <vm/vm_extern.h> 44 #include <vm/vm_kern.h> 45 46 #define __GFP_NOWARN 0 47 #define __GFP_HIGHMEM 0 48 #define __GFP_ZERO M_ZERO 49 #define __GFP_NORETRY 0 50 #define __GFP_NOMEMALLOC 0 51 #define __GFP_RECLAIM 0 52 #define __GFP_RECLAIMABLE 0 53 #define __GFP_RETRY_MAYFAIL 0 54 #define __GFP_MOVABLE 0 55 #define __GFP_COMP 0 56 #define __GFP_KSWAPD_RECLAIM 0 57 58 #define __GFP_IO 0 59 #define __GFP_NO_KSWAPD 0 60 #define __GFP_KSWAPD_RECLAIM 0 61 #define __GFP_WAIT M_WAITOK 62 #define __GFP_DMA32 (1U << 24) /* LinuxKPI only */ 63 #define __GFP_BITS_SHIFT 25 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_USER M_WAITOK 71 #define GFP_HIGHUSER M_WAITOK 72 #define GFP_HIGHUSER_MOVABLE M_WAITOK 73 #define GFP_IOFS M_NOWAIT 74 #define GFP_NOIO M_NOWAIT 75 #define GFP_NOFS M_NOWAIT 76 #define GFP_DMA32 __GFP_DMA32 77 #define GFP_TEMPORARY M_NOWAIT 78 #define GFP_NATIVE_MASK (M_NOWAIT | M_WAITOK | M_USE_RESERVE | M_ZERO) 79 #define GFP_TRANSHUGE 0 80 #define GFP_TRANSHUGE_LIGHT 0 81 82 CTASSERT((__GFP_DMA32 & GFP_NATIVE_MASK) == 0); 83 CTASSERT((__GFP_BITS_MASK & GFP_NATIVE_MASK) == GFP_NATIVE_MASK); 84 85 struct page_frag_cache { 86 void *va; 87 int pagecnt_bias; 88 }; 89 90 /* 91 * Resolve a page into a virtual address: 92 * 93 * NOTE: This function only works for pages allocated by the kernel. 94 */ 95 extern void *linux_page_address(struct page *); 96 97 #define page_address(page) linux_page_address(page) 98 99 /* 100 * Page management for unmapped pages: 101 */ 102 extern struct page *linux_alloc_pages(gfp_t flags, unsigned int order); 103 extern void linux_free_pages(struct page *page, unsigned int order); 104 void *linuxkpi_page_frag_alloc(struct page_frag_cache *, size_t, gfp_t); 105 void linuxkpi_page_frag_free(void *); 106 void linuxkpi__page_frag_cache_drain(struct page *, size_t); 107 108 static inline struct page * 109 alloc_page(gfp_t flags) 110 { 111 112 return (linux_alloc_pages(flags, 0)); 113 } 114 115 static inline struct page * 116 alloc_pages(gfp_t flags, unsigned int order) 117 { 118 119 return (linux_alloc_pages(flags, order)); 120 } 121 122 static inline struct page * 123 alloc_pages_node(int node_id, gfp_t flags, unsigned int order) 124 { 125 126 return (linux_alloc_pages(flags, order)); 127 } 128 129 static inline void 130 __free_pages(struct page *page, unsigned int order) 131 { 132 133 linux_free_pages(page, order); 134 } 135 136 static inline void 137 __free_page(struct page *page) 138 { 139 140 linux_free_pages(page, 0); 141 } 142 143 /* 144 * Page management for mapped pages: 145 */ 146 extern vm_offset_t linux_alloc_kmem(gfp_t flags, unsigned int order); 147 extern 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