1#ifndef __LINUX_MEMORY_HOTPLUG_H
2#define __LINUX_MEMORY_HOTPLUG_H
3
4#include <linux/mmzone.h>
5#include <linux/spinlock.h>
6#include <linux/notifier.h>
7#include <linux/bug.h>
8
9struct page;
10struct zone;
11struct pglist_data;
12struct mem_section;
13struct memory_block;
14
15#ifdef CONFIG_MEMORY_HOTPLUG
16
17
18
19
20
21enum {
22 MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 12,
23 SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE,
24 MIX_SECTION_INFO,
25 NODE_INFO,
26 MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO,
27};
28
29
30enum {
31 ONLINE_KEEP,
32 ONLINE_KERNEL,
33 ONLINE_MOVABLE,
34};
35
36
37
38
39static inline
40void pgdat_resize_lock(struct pglist_data *pgdat, unsigned long *flags)
41{
42 spin_lock_irqsave(&pgdat->node_size_lock, *flags);
43}
44static inline
45void pgdat_resize_unlock(struct pglist_data *pgdat, unsigned long *flags)
46{
47 spin_unlock_irqrestore(&pgdat->node_size_lock, *flags);
48}
49static inline
50void pgdat_resize_init(struct pglist_data *pgdat)
51{
52 spin_lock_init(&pgdat->node_size_lock);
53}
54
55
56
57
58
59
60
61static inline unsigned zone_span_seqbegin(struct zone *zone)
62{
63 return read_seqbegin(&zone->span_seqlock);
64}
65static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
66{
67 return read_seqretry(&zone->span_seqlock, iv);
68}
69static inline void zone_span_writelock(struct zone *zone)
70{
71 write_seqlock(&zone->span_seqlock);
72}
73static inline void zone_span_writeunlock(struct zone *zone)
74{
75 write_sequnlock(&zone->span_seqlock);
76}
77static inline void zone_seqlock_init(struct zone *zone)
78{
79 seqlock_init(&zone->span_seqlock);
80}
81extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages);
82extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages);
83extern int add_one_highpage(struct page *page, int pfn, int bad_ppro);
84
85extern int online_pages(unsigned long, unsigned long, int);
86extern void __offline_isolated_pages(unsigned long, unsigned long);
87
88typedef void (*online_page_callback_t)(struct page *page);
89
90extern int set_online_page_callback(online_page_callback_t callback);
91extern int restore_online_page_callback(online_page_callback_t callback);
92
93extern void __online_page_set_limits(struct page *page);
94extern void __online_page_increment_counters(struct page *page);
95extern void __online_page_free(struct page *page);
96
97#ifdef CONFIG_MEMORY_HOTREMOVE
98extern bool is_pageblock_removable_nolock(struct page *page);
99extern int arch_remove_memory(u64 start, u64 size);
100extern int __remove_pages(struct zone *zone, unsigned long start_pfn,
101 unsigned long nr_pages);
102#endif
103
104
105extern int __add_pages(int nid, struct zone *zone, unsigned long start_pfn,
106 unsigned long nr_pages);
107
108#ifdef CONFIG_NUMA
109extern int memory_add_physaddr_to_nid(u64 start);
110#else
111static inline int memory_add_physaddr_to_nid(u64 start)
112{
113 return 0;
114}
115#endif
116
117#ifdef CONFIG_HAVE_ARCH_NODEDATA_EXTENSION
118
119
120
121
122
123
124
125
126
127
128extern pg_data_t *arch_alloc_nodedata(int nid);
129extern void arch_free_nodedata(pg_data_t *pgdat);
130extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat);
131
132#else
133
134#define arch_alloc_nodedata(nid) generic_alloc_nodedata(nid)
135#define arch_free_nodedata(pgdat) generic_free_nodedata(pgdat)
136
137#ifdef CONFIG_NUMA
138
139
140
141
142
143
144#define generic_alloc_nodedata(nid) \
145({ \
146 kzalloc(sizeof(pg_data_t), GFP_KERNEL); \
147})
148
149
150
151
152#define generic_free_nodedata(pgdat) kfree(pgdat)
153
154extern pg_data_t *node_data[];
155static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
156{
157 node_data[nid] = pgdat;
158}
159
160#else
161
162
163static inline pg_data_t *generic_alloc_nodedata(int nid)
164{
165 BUG();
166 return NULL;
167}
168static inline void generic_free_nodedata(pg_data_t *pgdat)
169{
170}
171static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
172{
173}
174#endif
175#endif
176
177#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
178extern void register_page_bootmem_info_node(struct pglist_data *pgdat);
179#else
180static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
181{
182}
183#endif
184extern void put_page_bootmem(struct page *page);
185extern void get_page_bootmem(unsigned long ingo, struct page *page,
186 unsigned long type);
187
188
189
190
191
192
193
194void lock_memory_hotplug(void);
195void unlock_memory_hotplug(void);
196
197#else
198
199
200
201static inline void pgdat_resize_lock(struct pglist_data *p, unsigned long *f) {}
202static inline void pgdat_resize_unlock(struct pglist_data *p, unsigned long *f) {}
203static inline void pgdat_resize_init(struct pglist_data *pgdat) {}
204
205static inline unsigned zone_span_seqbegin(struct zone *zone)
206{
207 return 0;
208}
209static inline int zone_span_seqretry(struct zone *zone, unsigned iv)
210{
211 return 0;
212}
213static inline void zone_span_writelock(struct zone *zone) {}
214static inline void zone_span_writeunlock(struct zone *zone) {}
215static inline void zone_seqlock_init(struct zone *zone) {}
216
217static inline int mhp_notimplemented(const char *func)
218{
219 printk(KERN_WARNING "%s() called, with CONFIG_MEMORY_HOTPLUG disabled\n", func);
220 dump_stack();
221 return -ENOSYS;
222}
223
224static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
225{
226}
227
228static inline void lock_memory_hotplug(void) {}
229static inline void unlock_memory_hotplug(void) {}
230
231#endif
232
233#ifdef CONFIG_MEMORY_HOTREMOVE
234
235extern int is_mem_section_removable(unsigned long pfn, unsigned long nr_pages);
236extern void try_offline_node(int nid);
237extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages);
238extern void remove_memory(int nid, u64 start, u64 size);
239
240#else
241static inline int is_mem_section_removable(unsigned long pfn,
242 unsigned long nr_pages)
243{
244 return 0;
245}
246
247static inline void try_offline_node(int nid) {}
248
249static inline int offline_pages(unsigned long start_pfn, unsigned long nr_pages)
250{
251 return -EINVAL;
252}
253
254static inline void remove_memory(int nid, u64 start, u64 size) {}
255#endif
256
257extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn,
258 void *arg, int (*func)(struct memory_block *, void *));
259extern int mem_online_node(int nid);
260extern int add_memory(int nid, u64 start, u64 size);
261extern int arch_add_memory(int nid, u64 start, u64 size);
262extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages);
263extern bool is_memblock_offlined(struct memory_block *mem);
264extern void remove_memory(int nid, u64 start, u64 size);
265extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn,
266 int nr_pages);
267extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms);
268extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map,
269 unsigned long pnum);
270
271#endif
272