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 _LINUX_GFP_H_ 32 #define _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_RECLAIM 0 51 #define __GFP_RECLAIMABLE 0 52 #define __GFP_RETRY_MAYFAIL 0 53 #define __GFP_MOVABLE 0 54 #define __GFP_COMP 0 55 #define __GFP_KSWAPD_RECLAIM 0 56 57 #define __GFP_IO 0 58 #define __GFP_NO_KSWAPD 0 59 #define __GFP_WAIT M_WAITOK 60 #define __GFP_DMA32 (1U << 24) /* LinuxKPI only */ 61 #define __GFP_BITS_SHIFT 25 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_DMA32 __GFP_DMA32 74 #define GFP_TEMPORARY M_NOWAIT 75 #define GFP_NATIVE_MASK (M_NOWAIT | M_WAITOK | M_USE_RESERVE | M_ZERO) 76 #define GFP_TRANSHUGE 0 77 #define GFP_TRANSHUGE_LIGHT 0 78 79 CTASSERT((__GFP_DMA32 & GFP_NATIVE_MASK) == 0); 80 CTASSERT((__GFP_BITS_MASK & GFP_NATIVE_MASK) == GFP_NATIVE_MASK); 81 82 /* 83 * Resolve a page into a virtual address: 84 * 85 * NOTE: This function only works for pages allocated by the kernel. 86 */ 87 extern void *linux_page_address(struct page *); 88 89 #define page_address(page) linux_page_address(page) 90 91 /* 92 * Page management for unmapped pages: 93 */ 94 extern vm_page_t linux_alloc_pages(gfp_t flags, unsigned int order); 95 extern void linux_free_pages(vm_page_t page, unsigned int order); 96 97 static inline struct page * 98 alloc_page(gfp_t flags) 99 { 100 101 return (linux_alloc_pages(flags, 0)); 102 } 103 104 static inline struct page * 105 alloc_pages(gfp_t flags, unsigned int order) 106 { 107 108 return (linux_alloc_pages(flags, order)); 109 } 110 111 static inline struct page * 112 alloc_pages_node(int node_id, gfp_t flags, unsigned int order) 113 { 114 115 return (linux_alloc_pages(flags, order)); 116 } 117 118 static inline void 119 __free_pages(struct page *page, unsigned int order) 120 { 121 122 linux_free_pages(page, order); 123 } 124 125 static inline void 126 __free_page(struct page *page) 127 { 128 129 linux_free_pages(page, 0); 130 } 131 132 /* 133 * Page management for mapped pages: 134 */ 135 extern vm_offset_t linux_alloc_kmem(gfp_t flags, unsigned int order); 136 extern void linux_free_kmem(vm_offset_t, unsigned int order); 137 138 static inline vm_offset_t 139 get_zeroed_page(gfp_t flags) 140 { 141 142 return (linux_alloc_kmem(flags | __GFP_ZERO, 0)); 143 } 144 145 static inline vm_offset_t 146 __get_free_page(gfp_t flags) 147 { 148 149 return (linux_alloc_kmem(flags, 0)); 150 } 151 152 static inline vm_offset_t 153 __get_free_pages(gfp_t flags, unsigned int order) 154 { 155 156 return (linux_alloc_kmem(flags, order)); 157 } 158 159 static inline void 160 free_pages(uintptr_t addr, unsigned int order) 161 { 162 if (addr == 0) 163 return; 164 165 linux_free_kmem(addr, order); 166 } 167 168 static inline void 169 free_page(uintptr_t addr) 170 { 171 if (addr == 0) 172 return; 173 174 linux_free_kmem(addr, 0); 175 } 176 177 static inline bool 178 gfpflags_allow_blocking(const gfp_t gfp_flags) 179 { 180 return ((gfp_flags & (M_WAITOK | M_NOWAIT)) == M_WAITOK); 181 } 182 183 #define SetPageReserved(page) do { } while (0) /* NOP */ 184 #define ClearPageReserved(page) do { } while (0) /* NOP */ 185 186 #endif /* _LINUX_GFP_H_ */ 187