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_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 80CTASSERT((__GFP_DMA32 & GFP_NATIVE_MASK) == 0); 81CTASSERT((__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 */ 88extern 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 */ 95extern vm_page_t linux_alloc_pages(gfp_t flags, unsigned int order); 96extern void linux_free_pages(vm_page_t page, unsigned int order); 97 98static inline struct page * 99alloc_page(gfp_t flags) 100{ 101 102 return (linux_alloc_pages(flags, 0)); 103} 104 105static inline struct page * 106alloc_pages(gfp_t flags, unsigned int order) 107{ 108 109 return (linux_alloc_pages(flags, order)); 110} 111 112static inline struct page * 113alloc_pages_node(int node_id, gfp_t flags, unsigned int order) 114{ 115 116 return (linux_alloc_pages(flags, order)); 117} 118 119static inline void 120__free_pages(struct page *page, unsigned int order) 121{ 122 123 linux_free_pages(page, order); 124} 125 126static 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 */ 136extern vm_offset_t linux_alloc_kmem(gfp_t flags, unsigned int order); 137extern void linux_free_kmem(vm_offset_t, unsigned int order); 138 139static inline vm_offset_t 140get_zeroed_page(gfp_t flags) 141{ 142 143 return (linux_alloc_kmem(flags | __GFP_ZERO, 0)); 144} 145 146static inline vm_offset_t 147__get_free_page(gfp_t flags) 148{ 149 150 return (linux_alloc_kmem(flags, 0)); 151} 152 153static 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 160static inline void 161free_pages(uintptr_t addr, unsigned int order) 162{ 163 if (addr == 0) 164 return; 165 166 linux_free_kmem(addr, order); 167} 168 169static inline void 170free_page(uintptr_t addr) 171{ 172 if (addr == 0) 173 return; 174 175 linux_free_kmem(addr, 0); 176} 177 178static inline bool 179gfpflags_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 /* _LINUX_GFP_H_ */ 188