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 53 #define __GFP_IO 0 54 #define __GFP_NO_KSWAPD 0 55 #define __GFP_WAIT M_WAITOK 56 #define __GFP_DMA32 (1U << 24) /* LinuxKPI only */ 57 58 #define GFP_NOWAIT M_NOWAIT 59 #define GFP_ATOMIC (M_NOWAIT | M_USE_RESERVE) 60 #define GFP_KERNEL M_WAITOK 61 #define GFP_USER M_WAITOK 62 #define GFP_HIGHUSER M_WAITOK 63 #define GFP_HIGHUSER_MOVABLE M_WAITOK 64 #define GFP_IOFS M_NOWAIT 65 #define GFP_NOIO M_NOWAIT 66 #define GFP_DMA32 __GFP_DMA32 67 #define GFP_TEMPORARY M_NOWAIT 68 #define GFP_NATIVE_MASK (M_NOWAIT | M_WAITOK | M_USE_RESERVE | M_ZERO) 69 70 /* 71 * Resolve a page into a virtual address: 72 * 73 * NOTE: This function only works for pages allocated by the kernel. 74 */ 75 extern void *linux_page_address(struct page *); 76 77 #define page_address(page) linux_page_address(page) 78 79 /* 80 * Page management for unmapped pages: 81 */ 82 extern vm_page_t linux_alloc_pages(gfp_t flags, unsigned int order); 83 extern void linux_free_pages(vm_page_t page, unsigned int order); 84 85 static inline struct page * 86 alloc_page(gfp_t flags) 87 { 88 89 return (linux_alloc_pages(flags, 0)); 90 } 91 92 static inline struct page * 93 alloc_pages(gfp_t flags, unsigned int order) 94 { 95 96 return (linux_alloc_pages(flags, order)); 97 } 98 99 static inline struct page * 100 alloc_pages_node(int node_id, gfp_t flags, unsigned int order) 101 { 102 103 return (linux_alloc_pages(flags, order)); 104 } 105 106 static inline void 107 __free_pages(struct page *page, unsigned int order) 108 { 109 110 linux_free_pages(page, order); 111 } 112 113 static inline void 114 __free_page(struct page *page) 115 { 116 117 linux_free_pages(page, 0); 118 } 119 120 /* 121 * Page management for mapped pages: 122 */ 123 extern vm_offset_t linux_alloc_kmem(gfp_t flags, unsigned int order); 124 extern void linux_free_kmem(vm_offset_t, unsigned int order); 125 126 static inline vm_offset_t 127 get_zeroed_page(gfp_t flags) 128 { 129 130 return (linux_alloc_kmem(flags | __GFP_ZERO, 0)); 131 } 132 133 static inline vm_offset_t 134 __get_free_page(gfp_t flags) 135 { 136 137 return (linux_alloc_kmem(flags, 0)); 138 } 139 140 static inline vm_offset_t 141 __get_free_pages(gfp_t flags, unsigned int order) 142 { 143 144 return (linux_alloc_kmem(flags, order)); 145 } 146 147 static inline void 148 free_pages(uintptr_t addr, unsigned int order) 149 { 150 if (addr == 0) 151 return; 152 153 linux_free_kmem(addr, order); 154 } 155 156 static inline void 157 free_page(uintptr_t addr) 158 { 159 if (addr == 0) 160 return; 161 162 linux_free_kmem(addr, 0); 163 } 164 165 static inline bool 166 gfpflags_allow_blocking(const gfp_t gfp_flags) 167 { 168 return ((gfp_flags & (M_WAITOK | M_NOWAIT)) == M_WAITOK); 169 } 170 171 #define kmalloc_node(chunk, mask, node) kmalloc(chunk, mask) 172 173 #define SetPageReserved(page) do { } while (0) /* NOP */ 174 #define ClearPageReserved(page) do { } while (0) /* NOP */ 175 176 #endif /* _LINUX_GFP_H_ */ 177