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: stable/11/sys/compat/linuxkpi/common/include/linux/gfp.h 335410 2018-06-20 06:34:31Z hselasky $ 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 56#define __GFP_IO 0 57#define __GFP_NO_KSWAPD 0 58#define __GFP_WAIT M_WAITOK 59#define __GFP_DMA32 (1U << 24) /* LinuxKPI only */ 60#define __GFP_BITS_SHIFT 25 61#define __GFP_BITS_MASK ((1 << __GFP_BITS_SHIFT) - 1) 62#define __GFP_NOFAIL M_WAITOK 63 64#define GFP_NOWAIT M_NOWAIT 65#define GFP_ATOMIC (M_NOWAIT | M_USE_RESERVE) 66#define GFP_KERNEL M_WAITOK 67#define GFP_USER M_WAITOK 68#define GFP_HIGHUSER M_WAITOK 69#define GFP_HIGHUSER_MOVABLE M_WAITOK 70#define GFP_IOFS M_NOWAIT 71#define GFP_NOIO M_NOWAIT 72#define GFP_DMA32 __GFP_DMA32 73#define GFP_TEMPORARY M_NOWAIT 74#define GFP_NATIVE_MASK (M_NOWAIT | M_WAITOK | M_USE_RESERVE | M_ZERO) 75#define GFP_TRANSHUGE 0 76 77CTASSERT((__GFP_DMA32 & GFP_NATIVE_MASK) == 0); 78CTASSERT((__GFP_BITS_MASK & GFP_NATIVE_MASK) == GFP_NATIVE_MASK); 79 80/* 81 * Resolve a page into a virtual address: 82 * 83 * NOTE: This function only works for pages allocated by the kernel. 84 */ 85extern void *linux_page_address(struct page *); 86 87#define page_address(page) linux_page_address(page) 88 89/* 90 * Page management for unmapped pages: 91 */ 92extern vm_page_t linux_alloc_pages(gfp_t flags, unsigned int order); 93extern void linux_free_pages(vm_page_t page, unsigned int order); 94 95static inline struct page * 96alloc_page(gfp_t flags) 97{ 98 99 return (linux_alloc_pages(flags, 0)); 100} 101 102static inline struct page * 103alloc_pages(gfp_t flags, unsigned int order) 104{ 105 106 return (linux_alloc_pages(flags, order)); 107} 108 109static inline struct page * 110alloc_pages_node(int node_id, gfp_t flags, unsigned int order) 111{ 112 113 return (linux_alloc_pages(flags, order)); 114} 115 116static inline void 117__free_pages(struct page *page, unsigned int order) 118{ 119 120 linux_free_pages(page, order); 121} 122 123static inline void 124__free_page(struct page *page) 125{ 126 127 linux_free_pages(page, 0); 128} 129 130/* 131 * Page management for mapped pages: 132 */ 133extern vm_offset_t linux_alloc_kmem(gfp_t flags, unsigned int order); 134extern void linux_free_kmem(vm_offset_t, unsigned int order); 135 136static inline vm_offset_t 137get_zeroed_page(gfp_t flags) 138{ 139 140 return (linux_alloc_kmem(flags | __GFP_ZERO, 0)); 141} 142 143static inline vm_offset_t 144__get_free_page(gfp_t flags) 145{ 146 147 return (linux_alloc_kmem(flags, 0)); 148} 149 150static inline vm_offset_t 151__get_free_pages(gfp_t flags, unsigned int order) 152{ 153 154 return (linux_alloc_kmem(flags, order)); 155} 156 157static inline void 158free_pages(uintptr_t addr, unsigned int order) 159{ 160 if (addr == 0) 161 return; 162 163 linux_free_kmem(addr, order); 164} 165 166static inline void 167free_page(uintptr_t addr) 168{ 169 if (addr == 0) 170 return; 171 172 linux_free_kmem(addr, 0); 173} 174 175static inline bool 176gfpflags_allow_blocking(const gfp_t gfp_flags) 177{ 178 return ((gfp_flags & (M_WAITOK | M_NOWAIT)) == M_WAITOK); 179} 180 181#define SetPageReserved(page) do { } while (0) /* NOP */ 182#define ClearPageReserved(page) do { } while (0) /* NOP */ 183 184#endif /* _LINUX_GFP_H_ */ 185