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_DMA32 __GFP_DMA32 76 #define GFP_TEMPORARY M_NOWAIT 77 #define GFP_NATIVE_MASK (M_NOWAIT | M_WAITOK | M_USE_RESERVE | M_ZERO) 78 #define GFP_TRANSHUGE 0 79 #define GFP_TRANSHUGE_LIGHT 0 80 81 CTASSERT((__GFP_DMA32 & GFP_NATIVE_MASK) == 0); 82 CTASSERT((__GFP_BITS_MASK & GFP_NATIVE_MASK) == GFP_NATIVE_MASK); 83 84 struct page_frag_cache { 85 void *va; 86 int pagecnt_bias; 87 }; 88 89 /* 90 * Resolve a page into a virtual address: 91 * 92 * NOTE: This function only works for pages allocated by the kernel. 93 */ 94 extern void *linux_page_address(struct page *); 95 96 #define page_address(page) linux_page_address(page) 97 98 /* 99 * Page management for unmapped pages: 100 */ 101 extern vm_page_t linux_alloc_pages(gfp_t flags, unsigned int order); 102 extern void linux_free_pages(vm_page_t page, unsigned int order); 103 void *linuxkpi_page_frag_alloc(struct page_frag_cache *, size_t, gfp_t); 104 void linuxkpi_page_frag_free(void *); 105 void linuxkpi__page_frag_cache_drain(struct page *, size_t); 106 107 static inline struct page * 108 alloc_page(gfp_t flags) 109 { 110 111 return (linux_alloc_pages(flags, 0)); 112 } 113 114 static inline struct page * 115 alloc_pages(gfp_t flags, unsigned int order) 116 { 117 118 return (linux_alloc_pages(flags, order)); 119 } 120 121 static inline struct page * 122 alloc_pages_node(int node_id, gfp_t flags, unsigned int order) 123 { 124 125 return (linux_alloc_pages(flags, order)); 126 } 127 128 static inline void 129 __free_pages(struct page *page, unsigned int order) 130 { 131 132 linux_free_pages(page, order); 133 } 134 135 static inline void 136 __free_page(struct page *page) 137 { 138 139 linux_free_pages(page, 0); 140 } 141 142 /* 143 * Page management for mapped pages: 144 */ 145 extern vm_offset_t linux_alloc_kmem(gfp_t flags, unsigned int order); 146 extern void linux_free_kmem(vm_offset_t, unsigned int order); 147 148 static inline vm_offset_t 149 get_zeroed_page(gfp_t flags) 150 { 151 152 return (linux_alloc_kmem(flags | __GFP_ZERO, 0)); 153 } 154 155 static inline vm_offset_t 156 __get_free_page(gfp_t flags) 157 { 158 159 return (linux_alloc_kmem(flags, 0)); 160 } 161 162 static inline vm_offset_t 163 __get_free_pages(gfp_t flags, unsigned int order) 164 { 165 166 return (linux_alloc_kmem(flags, order)); 167 } 168 169 static inline void 170 free_pages(uintptr_t addr, unsigned int order) 171 { 172 if (addr == 0) 173 return; 174 175 linux_free_kmem(addr, order); 176 } 177 178 static inline void 179 free_page(uintptr_t addr) 180 { 181 if (addr == 0) 182 return; 183 184 linux_free_kmem(addr, 0); 185 } 186 187 static inline void * 188 page_frag_alloc(struct page_frag_cache *pfc, size_t fragsz, gfp_t gfp) 189 { 190 191 return (linuxkpi_page_frag_alloc(pfc, fragsz, gfp)); 192 } 193 194 static inline void 195 page_frag_free(void *addr) 196 { 197 198 linuxkpi_page_frag_free(addr); 199 } 200 201 static inline void 202 __page_frag_cache_drain(struct page *page, size_t count) 203 { 204 205 linuxkpi__page_frag_cache_drain(page, count); 206 } 207 208 static inline bool 209 gfpflags_allow_blocking(const gfp_t gfp_flags) 210 { 211 return ((gfp_flags & (M_WAITOK | M_NOWAIT)) == M_WAITOK); 212 } 213 214 #define SetPageReserved(page) do { } while (0) /* NOP */ 215 #define ClearPageReserved(page) do { } while (0) /* NOP */ 216 217 #endif /* _LINUXKPI_LINUX_GFP_H_ */ 218