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_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_KSWAPD_RECLAIM 0 60 #define __GFP_WAIT M_WAITOK 61 #define __GFP_DMA32 (1U << 24) /* LinuxKPI only */ 62 #define __GFP_BITS_SHIFT 25 63 #define __GFP_BITS_MASK ((1 << __GFP_BITS_SHIFT) - 1) 64 #define __GFP_NOFAIL M_WAITOK 65 66 #define GFP_NOWAIT M_NOWAIT 67 #define GFP_ATOMIC (M_NOWAIT | M_USE_RESERVE) 68 #define GFP_KERNEL M_WAITOK 69 #define GFP_USER M_WAITOK 70 #define GFP_HIGHUSER M_WAITOK 71 #define GFP_HIGHUSER_MOVABLE M_WAITOK 72 #define GFP_IOFS M_NOWAIT 73 #define GFP_NOIO M_NOWAIT 74 #define GFP_DMA32 __GFP_DMA32 75 #define GFP_TEMPORARY M_NOWAIT 76 #define GFP_NATIVE_MASK (M_NOWAIT | M_WAITOK | M_USE_RESERVE | M_ZERO) 77 #define GFP_TRANSHUGE 0 78 #define GFP_TRANSHUGE_LIGHT 0 79 80 CTASSERT((__GFP_DMA32 & GFP_NATIVE_MASK) == 0); 81 CTASSERT((__GFP_BITS_MASK & GFP_NATIVE_MASK) == GFP_NATIVE_MASK); 82 83 /* 84 * Resolve a page into a virtual address: 85 * 86 * NOTE: This function only works for pages allocated by the kernel. 87 */ 88 extern void *linux_page_address(struct page *); 89 90 #define page_address(page) linux_page_address(page) 91 92 /* 93 * Page management for unmapped pages: 94 */ 95 extern vm_page_t linux_alloc_pages(gfp_t flags, unsigned int order); 96 extern void linux_free_pages(vm_page_t page, unsigned int order); 97 98 static inline struct page * 99 alloc_page(gfp_t flags) 100 { 101 102 return (linux_alloc_pages(flags, 0)); 103 } 104 105 static inline struct page * 106 alloc_pages(gfp_t flags, unsigned int order) 107 { 108 109 return (linux_alloc_pages(flags, order)); 110 } 111 112 static inline struct page * 113 alloc_pages_node(int node_id, gfp_t flags, unsigned int order) 114 { 115 116 return (linux_alloc_pages(flags, order)); 117 } 118 119 static inline void 120 __free_pages(struct page *page, unsigned int order) 121 { 122 123 linux_free_pages(page, order); 124 } 125 126 static inline void 127 __free_page(struct page *page) 128 { 129 130 linux_free_pages(page, 0); 131 } 132 133 /* 134 * Page management for mapped pages: 135 */ 136 extern vm_offset_t linux_alloc_kmem(gfp_t flags, unsigned int order); 137 extern void linux_free_kmem(vm_offset_t, unsigned int order); 138 139 static inline vm_offset_t 140 get_zeroed_page(gfp_t flags) 141 { 142 143 return (linux_alloc_kmem(flags | __GFP_ZERO, 0)); 144 } 145 146 static inline vm_offset_t 147 __get_free_page(gfp_t flags) 148 { 149 150 return (linux_alloc_kmem(flags, 0)); 151 } 152 153 static inline vm_offset_t 154 __get_free_pages(gfp_t flags, unsigned int order) 155 { 156 157 return (linux_alloc_kmem(flags, order)); 158 } 159 160 static inline void 161 free_pages(uintptr_t addr, unsigned int order) 162 { 163 if (addr == 0) 164 return; 165 166 linux_free_kmem(addr, order); 167 } 168 169 static inline void 170 free_page(uintptr_t addr) 171 { 172 if (addr == 0) 173 return; 174 175 linux_free_kmem(addr, 0); 176 } 177 178 static inline bool 179 gfpflags_allow_blocking(const gfp_t gfp_flags) 180 { 181 return ((gfp_flags & (M_WAITOK | M_NOWAIT)) == M_WAITOK); 182 } 183 184 #define SetPageReserved(page) do { } while (0) /* NOP */ 185 #define ClearPageReserved(page) do { } while (0) /* NOP */ 186 187 #endif /* _LINUXKPI_LINUX_GFP_H_ */ 188