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208d54e5 DH |
1 | #ifndef __LINUX_MEMORY_HOTPLUG_H |
2 | #define __LINUX_MEMORY_HOTPLUG_H | |
3 | ||
4 | #include <linux/mmzone.h> | |
5 | #include <linux/spinlock.h> | |
3947be19 | 6 | #include <linux/notifier.h> |
187f1882 | 7 | #include <linux/bug.h> |
208d54e5 | 8 | |
78679302 KH |
9 | struct page; |
10 | struct zone; | |
11 | struct pglist_data; | |
ea01ea93 | 12 | struct mem_section; |
e90bdb7f | 13 | struct memory_block; |
62cedb9f | 14 | struct resource; |
78679302 | 15 | |
208d54e5 | 16 | #ifdef CONFIG_MEMORY_HOTPLUG |
04753278 YG |
17 | |
18 | /* | |
5f24ce5f AA |
19 | * Types for free bootmem stored in page->lru.next. These have to be in |
20 | * some random range in unsigned long space for debugging purposes. | |
04753278 | 21 | */ |
5f24ce5f AA |
22 | enum { |
23 | MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 12, | |
24 | SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE, | |
25 | MIX_SECTION_INFO, | |
26 | NODE_INFO, | |
27 | MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO, | |
28 | }; | |
04753278 | 29 | |
4f7c6b49 | 30 | /* Types for control the zone type of onlined and offlined memory */ |
511c2aba | 31 | enum { |
4f7c6b49 TC |
32 | MMOP_OFFLINE = -1, |
33 | MMOP_ONLINE_KEEP, | |
34 | MMOP_ONLINE_KERNEL, | |
35 | MMOP_ONLINE_MOVABLE, | |
511c2aba LJ |
36 | }; |
37 | ||
208d54e5 DH |
38 | /* |
39 | * pgdat resizing functions | |
40 | */ | |
41 | static inline | |
42 | void pgdat_resize_lock(struct pglist_data *pgdat, unsigned long *flags) | |
43 | { | |
44 | spin_lock_irqsave(&pgdat->node_size_lock, *flags); | |
45 | } | |
46 | static inline | |
47 | void pgdat_resize_unlock(struct pglist_data *pgdat, unsigned long *flags) | |
48 | { | |
bdc8cb98 | 49 | spin_unlock_irqrestore(&pgdat->node_size_lock, *flags); |
208d54e5 DH |
50 | } |
51 | static inline | |
52 | void pgdat_resize_init(struct pglist_data *pgdat) | |
53 | { | |
54 | spin_lock_init(&pgdat->node_size_lock); | |
55 | } | |
bdc8cb98 DH |
56 | /* |
57 | * Zone resizing functions | |
511c2aba LJ |
58 | * |
59 | * Note: any attempt to resize a zone should has pgdat_resize_lock() | |
60 | * zone_span_writelock() both held. This ensure the size of a zone | |
61 | * can't be changed while pgdat_resize_lock() held. | |
bdc8cb98 DH |
62 | */ |
63 | static inline unsigned zone_span_seqbegin(struct zone *zone) | |
64 | { | |
65 | return read_seqbegin(&zone->span_seqlock); | |
66 | } | |
67 | static inline int zone_span_seqretry(struct zone *zone, unsigned iv) | |
68 | { | |
69 | return read_seqretry(&zone->span_seqlock, iv); | |
70 | } | |
71 | static inline void zone_span_writelock(struct zone *zone) | |
72 | { | |
73 | write_seqlock(&zone->span_seqlock); | |
74 | } | |
75 | static inline void zone_span_writeunlock(struct zone *zone) | |
76 | { | |
77 | write_sequnlock(&zone->span_seqlock); | |
78 | } | |
79 | static inline void zone_seqlock_init(struct zone *zone) | |
80 | { | |
81 | seqlock_init(&zone->span_seqlock); | |
82 | } | |
3947be19 DH |
83 | extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages); |
84 | extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages); | |
85 | extern int add_one_highpage(struct page *page, int pfn, int bad_ppro); | |
3947be19 | 86 | /* VM interface that may be used by firmware interface */ |
511c2aba | 87 | extern int online_pages(unsigned long, unsigned long, int); |
ed2f2400 | 88 | extern int test_pages_in_a_zone(unsigned long, unsigned long); |
0c0e6195 | 89 | extern void __offline_isolated_pages(unsigned long, unsigned long); |
48e94196 | 90 | |
9d0ad8ca DK |
91 | typedef void (*online_page_callback_t)(struct page *page); |
92 | ||
93 | extern int set_online_page_callback(online_page_callback_t callback); | |
94 | extern int restore_online_page_callback(online_page_callback_t callback); | |
95 | ||
96 | extern void __online_page_set_limits(struct page *page); | |
97 | extern void __online_page_increment_counters(struct page *page); | |
98 | extern void __online_page_free(struct page *page); | |
99 | ||
01b0f197 TK |
100 | extern int try_online_node(int nid); |
101 | ||
49ac8255 KH |
102 | #ifdef CONFIG_MEMORY_HOTREMOVE |
103 | extern bool is_pageblock_removable_nolock(struct page *page); | |
24d335ca | 104 | extern int arch_remove_memory(u64 start, u64 size); |
4edd7cef DR |
105 | extern int __remove_pages(struct zone *zone, unsigned long start_pfn, |
106 | unsigned long nr_pages); | |
49ac8255 KH |
107 | #endif /* CONFIG_MEMORY_HOTREMOVE */ |
108 | ||
3947be19 | 109 | /* reasonably generic interface to expand the physical pages in a zone */ |
c04fc586 | 110 | extern int __add_pages(int nid, struct zone *zone, unsigned long start_pfn, |
3947be19 | 111 | unsigned long nr_pages); |
bc02af93 YG |
112 | |
113 | #ifdef CONFIG_NUMA | |
114 | extern int memory_add_physaddr_to_nid(u64 start); | |
115 | #else | |
116 | static inline int memory_add_physaddr_to_nid(u64 start) | |
117 | { | |
118 | return 0; | |
119 | } | |
120 | #endif | |
121 | ||
306d6cbe YG |
122 | #ifdef CONFIG_HAVE_ARCH_NODEDATA_EXTENSION |
123 | /* | |
124 | * For supporting node-hotadd, we have to allocate a new pgdat. | |
125 | * | |
126 | * If an arch has generic style NODE_DATA(), | |
127 | * node_data[nid] = kzalloc() works well. But it depends on the architecture. | |
128 | * | |
129 | * In general, generic_alloc_nodedata() is used. | |
130 | * Now, arch_free_nodedata() is just defined for error path of node_hot_add. | |
131 | * | |
132 | */ | |
dd0932d9 YG |
133 | extern pg_data_t *arch_alloc_nodedata(int nid); |
134 | extern void arch_free_nodedata(pg_data_t *pgdat); | |
7049027c | 135 | extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat); |
306d6cbe YG |
136 | |
137 | #else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ | |
138 | ||
139 | #define arch_alloc_nodedata(nid) generic_alloc_nodedata(nid) | |
140 | #define arch_free_nodedata(pgdat) generic_free_nodedata(pgdat) | |
141 | ||
142 | #ifdef CONFIG_NUMA | |
143 | /* | |
144 | * If ARCH_HAS_NODEDATA_EXTENSION=n, this func is used to allocate pgdat. | |
145 | * XXX: kmalloc_node() can't work well to get new node's memory at this time. | |
146 | * Because, pgdat for the new node is not allocated/initialized yet itself. | |
147 | * To use new node's memory, more consideration will be necessary. | |
148 | */ | |
149 | #define generic_alloc_nodedata(nid) \ | |
150 | ({ \ | |
151 | kzalloc(sizeof(pg_data_t), GFP_KERNEL); \ | |
152 | }) | |
153 | /* | |
154 | * This definition is just for error path in node hotadd. | |
155 | * For node hotremove, we have to replace this. | |
156 | */ | |
157 | #define generic_free_nodedata(pgdat) kfree(pgdat) | |
158 | ||
10ad400b YG |
159 | extern pg_data_t *node_data[]; |
160 | static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) | |
161 | { | |
162 | node_data[nid] = pgdat; | |
163 | } | |
164 | ||
306d6cbe YG |
165 | #else /* !CONFIG_NUMA */ |
166 | ||
167 | /* never called */ | |
168 | static inline pg_data_t *generic_alloc_nodedata(int nid) | |
169 | { | |
170 | BUG(); | |
171 | return NULL; | |
172 | } | |
173 | static inline void generic_free_nodedata(pg_data_t *pgdat) | |
174 | { | |
175 | } | |
10ad400b YG |
176 | static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) |
177 | { | |
178 | } | |
306d6cbe YG |
179 | #endif /* CONFIG_NUMA */ |
180 | #endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ | |
181 | ||
46723bfa YI |
182 | #ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE |
183 | extern void register_page_bootmem_info_node(struct pglist_data *pgdat); | |
184 | #else | |
04753278 YG |
185 | static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
186 | { | |
187 | } | |
04753278 | 188 | #endif |
46723bfa YI |
189 | extern void put_page_bootmem(struct page *page); |
190 | extern void get_page_bootmem(unsigned long ingo, struct page *page, | |
191 | unsigned long type); | |
04753278 | 192 | |
bfc8c901 VD |
193 | void get_online_mems(void); |
194 | void put_online_mems(void); | |
20d6c96b | 195 | |
30467e0b DR |
196 | void mem_hotplug_begin(void); |
197 | void mem_hotplug_done(void); | |
198 | ||
208d54e5 DH |
199 | #else /* ! CONFIG_MEMORY_HOTPLUG */ |
200 | /* | |
201 | * Stub functions for when hotplug is off | |
202 | */ | |
203 | static inline void pgdat_resize_lock(struct pglist_data *p, unsigned long *f) {} | |
204 | static inline void pgdat_resize_unlock(struct pglist_data *p, unsigned long *f) {} | |
205 | static inline void pgdat_resize_init(struct pglist_data *pgdat) {} | |
bdc8cb98 DH |
206 | |
207 | static inline unsigned zone_span_seqbegin(struct zone *zone) | |
208 | { | |
209 | return 0; | |
210 | } | |
211 | static inline int zone_span_seqretry(struct zone *zone, unsigned iv) | |
212 | { | |
213 | return 0; | |
214 | } | |
215 | static inline void zone_span_writelock(struct zone *zone) {} | |
216 | static inline void zone_span_writeunlock(struct zone *zone) {} | |
217 | static inline void zone_seqlock_init(struct zone *zone) {} | |
3947be19 DH |
218 | |
219 | static inline int mhp_notimplemented(const char *func) | |
220 | { | |
221 | printk(KERN_WARNING "%s() called, with CONFIG_MEMORY_HOTPLUG disabled\n", func); | |
222 | dump_stack(); | |
223 | return -ENOSYS; | |
224 | } | |
225 | ||
04753278 YG |
226 | static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
227 | { | |
228 | } | |
229 | ||
01b0f197 TK |
230 | static inline int try_online_node(int nid) |
231 | { | |
232 | return 0; | |
233 | } | |
234 | ||
bfc8c901 VD |
235 | static inline void get_online_mems(void) {} |
236 | static inline void put_online_mems(void) {} | |
20d6c96b | 237 | |
30467e0b DR |
238 | static inline void mem_hotplug_begin(void) {} |
239 | static inline void mem_hotplug_done(void) {} | |
240 | ||
bdc8cb98 | 241 | #endif /* ! CONFIG_MEMORY_HOTPLUG */ |
9d99aaa3 | 242 | |
5c755e9f BP |
243 | #ifdef CONFIG_MEMORY_HOTREMOVE |
244 | ||
245 | extern int is_mem_section_removable(unsigned long pfn, unsigned long nr_pages); | |
90b30cdc | 246 | extern void try_offline_node(int nid); |
aba6efc4 RW |
247 | extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
248 | extern void remove_memory(int nid, u64 start, u64 size); | |
5c755e9f BP |
249 | |
250 | #else | |
251 | static inline int is_mem_section_removable(unsigned long pfn, | |
252 | unsigned long nr_pages) | |
253 | { | |
254 | return 0; | |
255 | } | |
90b30cdc WC |
256 | |
257 | static inline void try_offline_node(int nid) {} | |
aba6efc4 RW |
258 | |
259 | static inline int offline_pages(unsigned long start_pfn, unsigned long nr_pages) | |
260 | { | |
261 | return -EINVAL; | |
262 | } | |
263 | ||
264 | static inline void remove_memory(int nid, u64 start, u64 size) {} | |
5c755e9f BP |
265 | #endif /* CONFIG_MEMORY_HOTREMOVE */ |
266 | ||
e2ff3940 RW |
267 | extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, |
268 | void *arg, int (*func)(struct memory_block *, void *)); | |
bc02af93 | 269 | extern int add_memory(int nid, u64 start, u64 size); |
62cedb9f | 270 | extern int add_memory_resource(int nid, struct resource *resource); |
033fbae9 DW |
271 | extern int zone_for_memory(int nid, u64 start, u64 size, int zone_default, |
272 | bool for_device); | |
273 | extern int arch_add_memory(int nid, u64 start, u64 size, bool for_device); | |
a16cee10 | 274 | extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
6677e3ea | 275 | extern bool is_memblock_offlined(struct memory_block *mem); |
242831eb | 276 | extern void remove_memory(int nid, u64 start, u64 size); |
85b35fea | 277 | extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn); |
4b94ffdc DW |
278 | extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms, |
279 | unsigned long map_offset); | |
04753278 YG |
280 | extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map, |
281 | unsigned long pnum); | |
9d99aaa3 | 282 | |
208d54e5 | 283 | #endif /* __LINUX_MEMORY_HOTPLUG_H */ |