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blk-mq: fix iteration of busy bitmap
[linux-2.6-block.git] / include / linux / bootmem.h
CommitLineData
1da177e4
LT		 1/*
2 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
3 */
4#ifndef _LINUX_BOOTMEM_H
5#define _LINUX_BOOTMEM_H
6
1da177e4 7#include <linux/mmzone.h>
26f09e9b 8#include <linux/mm_types.h>
e786e86a 9#include <asm/dma.h>
1da177e4
LT		 10
11/*
12 * simple boot-time physical memory area allocator.
13 */
14
15extern unsigned long max_low_pfn;
16extern unsigned long min_low_pfn;
17
18/*
19 * highest page
20 */
21extern unsigned long max_pfn;
22
08677214 23#ifndef CONFIG_NO_BOOTMEM
1da177e4
LT		 24/*
25 * node_bootmem_map is a map pointer - the bits represent all physical
26 * memory pages (including holes) on the node.
27 */
28typedef struct bootmem_data {
3560e249 29 unsigned long node_min_pfn;
1da177e4
LT		 30 unsigned long node_low_pfn;
31 void *node_bootmem_map;
5f2809e6
JW		 32 unsigned long last_end_off;
33 unsigned long hint_idx;
679bc9fb 34 struct list_head list;
1da177e4
LT		 35} bootmem_data_t;
36
b61bfa3c 37extern bootmem_data_t bootmem_node_data[];
08677214 38#endif
b61bfa3c 39
f71bf0ca 40extern unsigned long bootmem_bootmap_pages(unsigned long);
223e8dc9
JW		 41
42extern unsigned long init_bootmem_node(pg_data_t *pgdat,
43 unsigned long freepfn,
44 unsigned long startpfn,
45 unsigned long endpfn);
f71bf0ca 46extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
223e8dc9 47
223e8dc9 48extern unsigned long free_all_bootmem(void);
f784a3f1 49extern void reset_node_managed_pages(pg_data_t *pgdat);
7b4b2a0d 50extern void reset_all_zones_managed_pages(void);
223e8dc9
JW		 51
52extern void free_bootmem_node(pg_data_t *pgdat,
53 unsigned long addr,
54 unsigned long size);
81df9bff
JK		 55extern void free_bootmem(unsigned long physaddr, unsigned long size);
56extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
223e8dc9
JW		 57
58/*
59 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
60 * the architecture-specific code should honor this).
61 *
1754e44e
WSH		 62 * If flags is BOOTMEM_DEFAULT, then the return value is always 0 (success).
63 * If flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the memory
64 * already was reserved.
223e8dc9
JW		 65 */
66#define BOOTMEM_DEFAULT 0
67#define BOOTMEM_EXCLUSIVE (1<<0)
68
c1329375
TH		 69extern int reserve_bootmem(unsigned long addr,
70 unsigned long size,
71 int flags);
2d0aae41
TH		 72extern int reserve_bootmem_node(pg_data_t *pgdat,
73 unsigned long physaddr,
74 unsigned long size,
75 int flags);
76
77extern void *__alloc_bootmem(unsigned long size,
f71bf0ca
FBH		 78 unsigned long align,
79 unsigned long goal);
2d0aae41 80extern void *__alloc_bootmem_nopanic(unsigned long size,
f71bf0ca
FBH		 81 unsigned long align,
82 unsigned long goal);
223e8dc9
JW		 83extern void *__alloc_bootmem_node(pg_data_t *pgdat,
84 unsigned long size,
85 unsigned long align,
86 unsigned long goal);
08677214
YL		 87void *__alloc_bootmem_node_high(pg_data_t *pgdat,
88 unsigned long size,
89 unsigned long align,
90 unsigned long goal);
223e8dc9
JW		 91extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
92 unsigned long size,
93 unsigned long align,
94 unsigned long goal);
99ab7b19
YL		 95void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
96 unsigned long size,
97 unsigned long align,
98 unsigned long goal,
99 unsigned long limit);
2d0aae41
TH		 100extern void *__alloc_bootmem_low(unsigned long size,
101 unsigned long align,
102 unsigned long goal);
38fa4175
YL		 103void *__alloc_bootmem_low_nopanic(unsigned long size,
104 unsigned long align,
105 unsigned long goal);
f71bf0ca
FBH		 106extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
107 unsigned long size,
108 unsigned long align,
109 unsigned long goal);
c1329375 110
8bba154e
YL		 111#ifdef CONFIG_NO_BOOTMEM
112/* We are using top down, so it is safe to use 0 here */
113#define BOOTMEM_LOW_LIMIT 0
114#else
115#define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
116#endif
117
1da177e4 118#define alloc_bootmem(x) \
8bba154e 119 __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
53dde5f3 120#define alloc_bootmem_align(x, align) \
8bba154e 121 __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
74768ed8 122#define alloc_bootmem_nopanic(x) \
8bba154e 123 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
1da177e4 124#define alloc_bootmem_pages(x) \
8bba154e 125 __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
74768ed8 126#define alloc_bootmem_pages_nopanic(x) \
8bba154e 127 __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
1da177e4 128#define alloc_bootmem_node(pgdat, x) \
8bba154e 129 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
8f389a99 130#define alloc_bootmem_node_nopanic(pgdat, x) \
8bba154e 131 __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
1da177e4 132#define alloc_bootmem_pages_node(pgdat, x) \
8bba154e 133 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
2d0aae41 134#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
8bba154e 135 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
2d0aae41
TH		 136
137#define alloc_bootmem_low(x) \
138 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
38fa4175
YL		 139#define alloc_bootmem_low_pages_nopanic(x) \
140 __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
2d0aae41
TH		 141#define alloc_bootmem_low_pages(x) \
142 __alloc_bootmem_low(x, PAGE_SIZE, 0)
1da177e4 143#define alloc_bootmem_low_pages_node(pgdat, x) \
71fb2e8f 144 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
c6af5e9f 145
26f09e9b
SS		 146
147#if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM)
148
149/* FIXME: use MEMBLOCK_ALLOC_* variants here */
150#define BOOTMEM_ALLOC_ACCESSIBLE 0
151#define BOOTMEM_ALLOC_ANYWHERE (~(phys_addr_t)0)
152
153/* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
154void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
155 phys_addr_t align, phys_addr_t min_addr,
156 phys_addr_t max_addr, int nid);
157void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
158 phys_addr_t min_addr, phys_addr_t max_addr, int nid);
159void __memblock_free_early(phys_addr_t base, phys_addr_t size);
160void __memblock_free_late(phys_addr_t base, phys_addr_t size);
161
162static inline void * __init memblock_virt_alloc(
163 phys_addr_t size, phys_addr_t align)
164{
165 return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
166 BOOTMEM_ALLOC_ACCESSIBLE,
167 NUMA_NO_NODE);
168}
169
170static inline void * __init memblock_virt_alloc_nopanic(
171 phys_addr_t size, phys_addr_t align)
172{
173 return memblock_virt_alloc_try_nid_nopanic(size, align,
174 BOOTMEM_LOW_LIMIT,
175 BOOTMEM_ALLOC_ACCESSIBLE,
176 NUMA_NO_NODE);
177}
178
ad6492b8
YL		 179#ifndef ARCH_LOW_ADDRESS_LIMIT
180#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
181#endif
182
183static inline void * __init memblock_virt_alloc_low(
184 phys_addr_t size, phys_addr_t align)
185{
186 return memblock_virt_alloc_try_nid(size, align,
187 BOOTMEM_LOW_LIMIT,
188 ARCH_LOW_ADDRESS_LIMIT,
189 NUMA_NO_NODE);
190}
191static inline void * __init memblock_virt_alloc_low_nopanic(
192 phys_addr_t size, phys_addr_t align)
193{
194 return memblock_virt_alloc_try_nid_nopanic(size, align,
195 BOOTMEM_LOW_LIMIT,
196 ARCH_LOW_ADDRESS_LIMIT,
197 NUMA_NO_NODE);
198}
199
26f09e9b
SS		 200static inline void * __init memblock_virt_alloc_from_nopanic(
201 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
202{
203 return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
204 BOOTMEM_ALLOC_ACCESSIBLE,
205 NUMA_NO_NODE);
206}
207
208static inline void * __init memblock_virt_alloc_node(
209 phys_addr_t size, int nid)
210{
211 return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
212 BOOTMEM_ALLOC_ACCESSIBLE, nid);
213}
214
215static inline void * __init memblock_virt_alloc_node_nopanic(
216 phys_addr_t size, int nid)
217{
218 return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
219 BOOTMEM_ALLOC_ACCESSIBLE,
220 nid);
221}
222
223static inline void __init memblock_free_early(
224 phys_addr_t base, phys_addr_t size)
225{
226 __memblock_free_early(base, size);
227}
228
229static inline void __init memblock_free_early_nid(
230 phys_addr_t base, phys_addr_t size, int nid)
231{
232 __memblock_free_early(base, size);
233}
234
235static inline void __init memblock_free_late(
236 phys_addr_t base, phys_addr_t size)
237{
238 __memblock_free_late(base, size);
239}
240
241#else
242
243#define BOOTMEM_ALLOC_ACCESSIBLE 0
244
245
246/* Fall back to all the existing bootmem APIs */
247static inline void * __init memblock_virt_alloc(
248 phys_addr_t size, phys_addr_t align)
249{
250 if (!align)
251 align = SMP_CACHE_BYTES;
252 return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
253}
254
255static inline void * __init memblock_virt_alloc_nopanic(
256 phys_addr_t size, phys_addr_t align)
257{
258 if (!align)
259 align = SMP_CACHE_BYTES;
260 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
261}
262
ad6492b8
YL		 263static inline void * __init memblock_virt_alloc_low(
264 phys_addr_t size, phys_addr_t align)
265{
266 if (!align)
267 align = SMP_CACHE_BYTES;
07bacb38 268 return __alloc_bootmem_low(size, align, 0);
ad6492b8
YL		 269}
270
271static inline void * __init memblock_virt_alloc_low_nopanic(
272 phys_addr_t size, phys_addr_t align)
273{
274 if (!align)
275 align = SMP_CACHE_BYTES;
07bacb38 276 return __alloc_bootmem_low_nopanic(size, align, 0);
ad6492b8
YL		 277}
278
26f09e9b
SS		 279static inline void * __init memblock_virt_alloc_from_nopanic(
280 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
281{
282 return __alloc_bootmem_nopanic(size, align, min_addr);
283}
284
285static inline void * __init memblock_virt_alloc_node(
286 phys_addr_t size, int nid)
287{
288 return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
289 BOOTMEM_LOW_LIMIT);
290}
291
292static inline void * __init memblock_virt_alloc_node_nopanic(
293 phys_addr_t size, int nid)
294{
295 return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
296 SMP_CACHE_BYTES,
297 BOOTMEM_LOW_LIMIT);
298}
299
300static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size,
301 phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid)
302{
303 return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
304 min_addr);
305}
306
307static inline void * __init memblock_virt_alloc_try_nid_nopanic(
308 phys_addr_t size, phys_addr_t align,
309 phys_addr_t min_addr, phys_addr_t max_addr, int nid)
310{
311 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
312 min_addr, max_addr);
313}
314
315static inline void __init memblock_free_early(
316 phys_addr_t base, phys_addr_t size)
317{
318 free_bootmem(base, size);
319}
320
321static inline void __init memblock_free_early_nid(
322 phys_addr_t base, phys_addr_t size, int nid)
323{
324 free_bootmem_node(NODE_DATA(nid), base, size);
325}
326
327static inline void __init memblock_free_late(
328 phys_addr_t base, phys_addr_t size)
329{
330 free_bootmem_late(base, size);
331}
332#endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
333
6f167ec7
DH		 334#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
335extern void *alloc_remap(int nid, unsigned long size);
336#else
337static inline void *alloc_remap(int nid, unsigned long size)
338{
339 return NULL;
340}
f71bf0ca 341#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
6f167ec7 342
f71bf0ca
FBH		 343extern void *alloc_large_system_hash(const char *tablename,
344 unsigned long bucketsize,
345 unsigned long numentries,
346 int scale,
347 int flags,
348 unsigned int *_hash_shift,
349 unsigned int *_hash_mask,
31fe62b9
TB		 350 unsigned long low_limit,
351 unsigned long high_limit);
1da177e4 352
04903664 353#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
2c85f51d
JB		 354#define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
355 * shift passed via *_hash_shift */
1da177e4 356
c2fdf3a9
AB		 357/* Only NUMA needs hash distribution. 64bit NUMA architectures have
358 * sufficient vmalloc space.
1da177e4 359 */
c2fdf3a9 360#if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
1da177e4
LT		 361#define HASHDIST_DEFAULT 1
362#else
363#define HASHDIST_DEFAULT 0
364#endif
f034b5d4 365extern int hashdist; /* Distribute hashes across NUMA nodes? */
1da177e4
LT		 366
367
368#endif /* _LINUX_BOOTMEM_H */
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