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 #ifndef _LINUXKPI_LINUX_GFP_H_ 30 #define _LINUXKPI_LINUX_GFP_H_ 31 32 #include <sys/cdefs.h> 33 #include <sys/types.h> 34 #include <sys/systm.h> 35 #include <sys/malloc.h> 36 37 #include <linux/page.h> 38 39 #include <vm/vm_param.h> 40 #include <vm/vm_object.h> 41 #include <vm/vm_extern.h> 42 #include <vm/vm_kern.h> 43 44 #define __GFP_NOWARN 0 45 #define __GFP_HIGHMEM 0 46 #define __GFP_ZERO M_ZERO 47 #define __GFP_NORETRY 0 48 #define __GFP_NOMEMALLOC 0 49 #define __GFP_RECLAIM 0 50 #define __GFP_RECLAIMABLE 0 51 #define __GFP_RETRY_MAYFAIL 0 52 #define __GFP_MOVABLE 0 53 #define __GFP_COMP 0 54 #define __GFP_KSWAPD_RECLAIM 0 55 56 #define __GFP_IO 0 57 #define __GFP_NO_KSWAPD 0 58 #define __GFP_KSWAPD_RECLAIM 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_NOWAIT 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_NOFS 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 struct page_frag_cache { 84 void *va; 85 int pagecnt_bias; 86 }; 87 88 /* 89 * Resolve a page into a virtual address: 90 * 91 * NOTE: This function only works for pages allocated by the kernel. 92 */ 93 extern void *linux_page_address(struct page *); 94 95 #define page_address(page) linux_page_address(page) 96 97 /* 98 * Page management for unmapped pages: 99 */ 100 extern struct page *linux_alloc_pages(gfp_t flags, unsigned int order); 101 extern void linux_free_pages(struct page *page, unsigned int order); 102 void *linuxkpi_page_frag_alloc(struct page_frag_cache *, size_t, gfp_t); 103 void linuxkpi_page_frag_free(void *); 104 void linuxkpi__page_frag_cache_drain(struct page *, size_t); 105 106 static inline struct page * 107 alloc_page(gfp_t flags) 108 { 109 110 return (linux_alloc_pages(flags, 0)); 111 } 112 113 static inline struct page * 114 alloc_pages(gfp_t flags, unsigned int order) 115 { 116 117 return (linux_alloc_pages(flags, order)); 118 } 119 120 static inline struct page * 121 alloc_pages_node(int node_id, gfp_t flags, unsigned int order) 122 { 123 124 return (linux_alloc_pages(flags, order)); 125 } 126 127 static inline void 128 __free_pages(struct page *page, unsigned int order) 129 { 130 131 linux_free_pages(page, order); 132 } 133 134 static inline void 135 __free_page(struct page *page) 136 { 137 138 linux_free_pages(page, 0); 139 } 140 141 /* 142 * Page management for mapped pages: 143 */ 144 extern vm_offset_t linux_alloc_kmem(gfp_t flags, unsigned int order); 145 extern void linux_free_kmem(vm_offset_t, unsigned int order); 146 147 static inline vm_offset_t 148 get_zeroed_page(gfp_t flags) 149 { 150 151 return (linux_alloc_kmem(flags | __GFP_ZERO, 0)); 152 } 153 154 static inline vm_offset_t 155 __get_free_page(gfp_t flags) 156 { 157 158 return (linux_alloc_kmem(flags, 0)); 159 } 160 161 static inline vm_offset_t 162 __get_free_pages(gfp_t flags, unsigned int order) 163 { 164 165 return (linux_alloc_kmem(flags, order)); 166 } 167 168 static inline void 169 free_pages(uintptr_t addr, unsigned int order) 170 { 171 if (addr == 0) 172 return; 173 174 linux_free_kmem(addr, order); 175 } 176 177 static inline void 178 free_page(uintptr_t addr) 179 { 180 if (addr == 0) 181 return; 182 183 linux_free_kmem(addr, 0); 184 } 185 186 static inline void * 187 page_frag_alloc(struct page_frag_cache *pfc, size_t fragsz, gfp_t gfp) 188 { 189 190 return (linuxkpi_page_frag_alloc(pfc, fragsz, gfp)); 191 } 192 193 static inline void 194 page_frag_free(void *addr) 195 { 196 197 linuxkpi_page_frag_free(addr); 198 } 199 200 static inline void 201 __page_frag_cache_drain(struct page *page, size_t count) 202 { 203 204 linuxkpi__page_frag_cache_drain(page, count); 205 } 206 207 static inline bool 208 gfpflags_allow_blocking(const gfp_t gfp_flags) 209 { 210 return ((gfp_flags & (M_WAITOK | M_NOWAIT)) == M_WAITOK); 211 } 212 213 #define SetPageReserved(page) do { } while (0) /* NOP */ 214 #define ClearPageReserved(page) do { } while (0) /* NOP */ 215 216 #endif /* _LINUXKPI_LINUX_GFP_H_ */ 217