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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 | ||
31bc3858 VK |
102 | extern bool memhp_auto_online; |
103 | ||
49ac8255 KH |
104 | #ifdef CONFIG_MEMORY_HOTREMOVE |
105 | extern bool is_pageblock_removable_nolock(struct page *page); | |
24d335ca | 106 | extern int arch_remove_memory(u64 start, u64 size); |
4edd7cef DR |
107 | extern int __remove_pages(struct zone *zone, unsigned long start_pfn, |
108 | unsigned long nr_pages); | |
49ac8255 KH |
109 | #endif /* CONFIG_MEMORY_HOTREMOVE */ |
110 | ||
3947be19 | 111 | /* reasonably generic interface to expand the physical pages in a zone */ |
c04fc586 | 112 | extern int __add_pages(int nid, struct zone *zone, unsigned long start_pfn, |
3947be19 | 113 | unsigned long nr_pages); |
bc02af93 YG |
114 | |
115 | #ifdef CONFIG_NUMA | |
116 | extern int memory_add_physaddr_to_nid(u64 start); | |
117 | #else | |
118 | static inline int memory_add_physaddr_to_nid(u64 start) | |
119 | { | |
120 | return 0; | |
121 | } | |
122 | #endif | |
123 | ||
306d6cbe YG |
124 | #ifdef CONFIG_HAVE_ARCH_NODEDATA_EXTENSION |
125 | /* | |
126 | * For supporting node-hotadd, we have to allocate a new pgdat. | |
127 | * | |
128 | * If an arch has generic style NODE_DATA(), | |
129 | * node_data[nid] = kzalloc() works well. But it depends on the architecture. | |
130 | * | |
131 | * In general, generic_alloc_nodedata() is used. | |
132 | * Now, arch_free_nodedata() is just defined for error path of node_hot_add. | |
133 | * | |
134 | */ | |
dd0932d9 YG |
135 | extern pg_data_t *arch_alloc_nodedata(int nid); |
136 | extern void arch_free_nodedata(pg_data_t *pgdat); | |
7049027c | 137 | extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat); |
306d6cbe YG |
138 | |
139 | #else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ | |
140 | ||
141 | #define arch_alloc_nodedata(nid) generic_alloc_nodedata(nid) | |
142 | #define arch_free_nodedata(pgdat) generic_free_nodedata(pgdat) | |
143 | ||
144 | #ifdef CONFIG_NUMA | |
145 | /* | |
146 | * If ARCH_HAS_NODEDATA_EXTENSION=n, this func is used to allocate pgdat. | |
147 | * XXX: kmalloc_node() can't work well to get new node's memory at this time. | |
148 | * Because, pgdat for the new node is not allocated/initialized yet itself. | |
149 | * To use new node's memory, more consideration will be necessary. | |
150 | */ | |
151 | #define generic_alloc_nodedata(nid) \ | |
152 | ({ \ | |
153 | kzalloc(sizeof(pg_data_t), GFP_KERNEL); \ | |
154 | }) | |
155 | /* | |
156 | * This definition is just for error path in node hotadd. | |
157 | * For node hotremove, we have to replace this. | |
158 | */ | |
159 | #define generic_free_nodedata(pgdat) kfree(pgdat) | |
160 | ||
10ad400b YG |
161 | extern pg_data_t *node_data[]; |
162 | static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) | |
163 | { | |
164 | node_data[nid] = pgdat; | |
165 | } | |
166 | ||
306d6cbe YG |
167 | #else /* !CONFIG_NUMA */ |
168 | ||
169 | /* never called */ | |
170 | static inline pg_data_t *generic_alloc_nodedata(int nid) | |
171 | { | |
172 | BUG(); | |
173 | return NULL; | |
174 | } | |
175 | static inline void generic_free_nodedata(pg_data_t *pgdat) | |
176 | { | |
177 | } | |
10ad400b YG |
178 | static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) |
179 | { | |
180 | } | |
306d6cbe YG |
181 | #endif /* CONFIG_NUMA */ |
182 | #endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ | |
183 | ||
46723bfa YI |
184 | #ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE |
185 | extern void register_page_bootmem_info_node(struct pglist_data *pgdat); | |
186 | #else | |
04753278 YG |
187 | static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
188 | { | |
189 | } | |
04753278 | 190 | #endif |
46723bfa YI |
191 | extern void put_page_bootmem(struct page *page); |
192 | extern void get_page_bootmem(unsigned long ingo, struct page *page, | |
193 | unsigned long type); | |
04753278 | 194 | |
bfc8c901 VD |
195 | void get_online_mems(void); |
196 | void put_online_mems(void); | |
20d6c96b | 197 | |
30467e0b DR |
198 | void mem_hotplug_begin(void); |
199 | void mem_hotplug_done(void); | |
200 | ||
7cf91a98 JK |
201 | extern void set_zone_contiguous(struct zone *zone); |
202 | extern void clear_zone_contiguous(struct zone *zone); | |
203 | ||
208d54e5 DH |
204 | #else /* ! CONFIG_MEMORY_HOTPLUG */ |
205 | /* | |
206 | * Stub functions for when hotplug is off | |
207 | */ | |
208 | static inline void pgdat_resize_lock(struct pglist_data *p, unsigned long *f) {} | |
209 | static inline void pgdat_resize_unlock(struct pglist_data *p, unsigned long *f) {} | |
210 | static inline void pgdat_resize_init(struct pglist_data *pgdat) {} | |
bdc8cb98 DH |
211 | |
212 | static inline unsigned zone_span_seqbegin(struct zone *zone) | |
213 | { | |
214 | return 0; | |
215 | } | |
216 | static inline int zone_span_seqretry(struct zone *zone, unsigned iv) | |
217 | { | |
218 | return 0; | |
219 | } | |
220 | static inline void zone_span_writelock(struct zone *zone) {} | |
221 | static inline void zone_span_writeunlock(struct zone *zone) {} | |
222 | static inline void zone_seqlock_init(struct zone *zone) {} | |
3947be19 DH |
223 | |
224 | static inline int mhp_notimplemented(const char *func) | |
225 | { | |
226 | printk(KERN_WARNING "%s() called, with CONFIG_MEMORY_HOTPLUG disabled\n", func); | |
227 | dump_stack(); | |
228 | return -ENOSYS; | |
229 | } | |
230 | ||
04753278 YG |
231 | static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
232 | { | |
233 | } | |
234 | ||
01b0f197 TK |
235 | static inline int try_online_node(int nid) |
236 | { | |
237 | return 0; | |
238 | } | |
239 | ||
bfc8c901 VD |
240 | static inline void get_online_mems(void) {} |
241 | static inline void put_online_mems(void) {} | |
20d6c96b | 242 | |
30467e0b DR |
243 | static inline void mem_hotplug_begin(void) {} |
244 | static inline void mem_hotplug_done(void) {} | |
245 | ||
bdc8cb98 | 246 | #endif /* ! CONFIG_MEMORY_HOTPLUG */ |
9d99aaa3 | 247 | |
5c755e9f BP |
248 | #ifdef CONFIG_MEMORY_HOTREMOVE |
249 | ||
250 | extern int is_mem_section_removable(unsigned long pfn, unsigned long nr_pages); | |
90b30cdc | 251 | extern void try_offline_node(int nid); |
aba6efc4 RW |
252 | extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
253 | extern void remove_memory(int nid, u64 start, u64 size); | |
5c755e9f BP |
254 | |
255 | #else | |
256 | static inline int is_mem_section_removable(unsigned long pfn, | |
257 | unsigned long nr_pages) | |
258 | { | |
259 | return 0; | |
260 | } | |
90b30cdc WC |
261 | |
262 | static inline void try_offline_node(int nid) {} | |
aba6efc4 RW |
263 | |
264 | static inline int offline_pages(unsigned long start_pfn, unsigned long nr_pages) | |
265 | { | |
266 | return -EINVAL; | |
267 | } | |
268 | ||
269 | static inline void remove_memory(int nid, u64 start, u64 size) {} | |
5c755e9f BP |
270 | #endif /* CONFIG_MEMORY_HOTREMOVE */ |
271 | ||
e2ff3940 RW |
272 | extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, |
273 | void *arg, int (*func)(struct memory_block *, void *)); | |
bc02af93 | 274 | extern int add_memory(int nid, u64 start, u64 size); |
31bc3858 | 275 | extern int add_memory_resource(int nid, struct resource *resource, bool online); |
033fbae9 DW |
276 | extern int zone_for_memory(int nid, u64 start, u64 size, int zone_default, |
277 | bool for_device); | |
278 | extern int arch_add_memory(int nid, u64 start, u64 size, bool for_device); | |
a16cee10 | 279 | extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
6677e3ea | 280 | extern bool is_memblock_offlined(struct memory_block *mem); |
242831eb | 281 | extern void remove_memory(int nid, u64 start, u64 size); |
85b35fea | 282 | extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn); |
4b94ffdc DW |
283 | extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms, |
284 | unsigned long map_offset); | |
04753278 YG |
285 | extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map, |
286 | unsigned long pnum); | |
9d99aaa3 | 287 | |
208d54e5 | 288 | #endif /* __LINUX_MEMORY_HOTPLUG_H */ |