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_WAITOK
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 * Page management for unmapped pages:
90 */
91 struct page *linux_alloc_pages(gfp_t flags, unsigned int order);
92 void linux_free_pages(struct page *page, unsigned int order);
93 void *linuxkpi_page_frag_alloc(struct page_frag_cache *, size_t, gfp_t);
94 void linuxkpi_page_frag_free(void *);
95 void linuxkpi__page_frag_cache_drain(struct page *, size_t);
96
97 static inline struct page *
alloc_page(gfp_t flags)98 alloc_page(gfp_t flags)
99 {
100
101 return (linux_alloc_pages(flags, 0));
102 }
103
104 static inline struct page *
alloc_pages(gfp_t flags,unsigned int order)105 alloc_pages(gfp_t flags, unsigned int order)
106 {
107
108 return (linux_alloc_pages(flags, order));
109 }
110
111 static inline struct page *
alloc_pages_node(int node_id,gfp_t flags,unsigned int order)112 alloc_pages_node(int node_id, gfp_t flags, unsigned int order)
113 {
114
115 return (linux_alloc_pages(flags, order));
116 }
117
118 static inline void
__free_pages(struct page * page,unsigned int order)119 __free_pages(struct page *page, unsigned int order)
120 {
121
122 linux_free_pages(page, order);
123 }
124
125 static inline void
__free_page(struct page * page)126 __free_page(struct page *page)
127 {
128
129 linux_free_pages(page, 0);
130 }
131
132 static inline struct page *
dev_alloc_pages(unsigned int order)133 dev_alloc_pages(unsigned int order)
134 {
135 return (linux_alloc_pages(GFP_ATOMIC, order));
136 }
137
138 /*
139 * Page management for mapped pages:
140 */
141 vm_offset_t linux_alloc_kmem(gfp_t flags, unsigned int order);
142 void linux_free_kmem(vm_offset_t, unsigned int order);
143
144 static inline vm_offset_t
get_zeroed_page(gfp_t flags)145 get_zeroed_page(gfp_t flags)
146 {
147
148 return (linux_alloc_kmem(flags | __GFP_ZERO, 0));
149 }
150
151 static inline vm_offset_t
__get_free_page(gfp_t flags)152 __get_free_page(gfp_t flags)
153 {
154
155 return (linux_alloc_kmem(flags, 0));
156 }
157
158 static inline vm_offset_t
__get_free_pages(gfp_t flags,unsigned int order)159 __get_free_pages(gfp_t flags, unsigned int order)
160 {
161
162 return (linux_alloc_kmem(flags, order));
163 }
164
165 static inline void
free_pages(uintptr_t addr,unsigned int order)166 free_pages(uintptr_t addr, unsigned int order)
167 {
168 if (addr == 0)
169 return;
170
171 linux_free_kmem(addr, order);
172 }
173
174 static inline void
free_page(uintptr_t addr)175 free_page(uintptr_t addr)
176 {
177 if (addr == 0)
178 return;
179
180 linux_free_kmem(addr, 0);
181 }
182
183 static inline void *
page_frag_alloc(struct page_frag_cache * pfc,size_t fragsz,gfp_t gfp)184 page_frag_alloc(struct page_frag_cache *pfc, size_t fragsz, gfp_t gfp)
185 {
186
187 return (linuxkpi_page_frag_alloc(pfc, fragsz, gfp));
188 }
189
190 static inline void
page_frag_free(void * addr)191 page_frag_free(void *addr)
192 {
193
194 linuxkpi_page_frag_free(addr);
195 }
196
197 static inline void
__page_frag_cache_drain(struct page * page,size_t count)198 __page_frag_cache_drain(struct page *page, size_t count)
199 {
200
201 linuxkpi__page_frag_cache_drain(page, count);
202 }
203
204 static inline bool
gfpflags_allow_blocking(const gfp_t gfp_flags)205 gfpflags_allow_blocking(const gfp_t gfp_flags)
206 {
207 return ((gfp_flags & (M_WAITOK | M_NOWAIT)) == M_WAITOK);
208 }
209
210 #define SetPageReserved(page) do { } while (0) /* NOP */
211 #define ClearPageReserved(page) do { } while (0) /* NOP */
212
213 #endif /* _LINUXKPI_LINUX_GFP_H_ */
214