Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 1 | #ifndef __LINUX_MEMORY_HOTPLUG_H |
| 2 | #define __LINUX_MEMORY_HOTPLUG_H |
| 3 | |
| 4 | #include <linux/mmzone.h> |
| 5 | #include <linux/spinlock.h> |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 6 | #include <linux/notifier.h> |
Paul Gortmaker | 187f188 | 2011-11-23 20:12:59 -0500 | [diff] [blame] | 7 | #include <linux/bug.h> |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 8 | |
KAMEZAWA Hiroyuki | 7867930 | 2006-03-06 15:42:49 -0800 | [diff] [blame] | 9 | struct page; |
| 10 | struct zone; |
| 11 | struct pglist_data; |
Badari Pulavarty | ea01ea9 | 2008-04-28 02:12:01 -0700 | [diff] [blame] | 12 | struct mem_section; |
Wen Congyang | e90bdb7 | 2012-10-08 16:34:01 -0700 | [diff] [blame] | 13 | struct memory_block; |
KAMEZAWA Hiroyuki | 7867930 | 2006-03-06 15:42:49 -0800 | [diff] [blame] | 14 | |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 15 | #ifdef CONFIG_MEMORY_HOTPLUG |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 16 | |
| 17 | /* |
Andrea Arcangeli | 5f24ce5 | 2011-01-13 15:47:00 -0800 | [diff] [blame] | 18 | * Types for free bootmem stored in page->lru.next. These have to be in |
| 19 | * some random range in unsigned long space for debugging purposes. |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 20 | */ |
Andrea Arcangeli | 5f24ce5 | 2011-01-13 15:47:00 -0800 | [diff] [blame] | 21 | enum { |
| 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 | }; |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 28 | |
Tang Chen | 4f7c6b4 | 2014-08-06 16:05:13 -0700 | [diff] [blame] | 29 | /* Types for control the zone type of onlined and offlined memory */ |
Lai Jiangshan | 511c2ab | 2012-12-11 16:03:16 -0800 | [diff] [blame] | 30 | enum { |
Tang Chen | 4f7c6b4 | 2014-08-06 16:05:13 -0700 | [diff] [blame] | 31 | MMOP_OFFLINE = -1, |
| 32 | MMOP_ONLINE_KEEP, |
| 33 | MMOP_ONLINE_KERNEL, |
| 34 | MMOP_ONLINE_MOVABLE, |
Lai Jiangshan | 511c2ab | 2012-12-11 16:03:16 -0800 | [diff] [blame] | 35 | }; |
| 36 | |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 37 | /* |
| 38 | * pgdat resizing functions |
| 39 | */ |
| 40 | static inline |
| 41 | void pgdat_resize_lock(struct pglist_data *pgdat, unsigned long *flags) |
| 42 | { |
| 43 | spin_lock_irqsave(&pgdat->node_size_lock, *flags); |
| 44 | } |
| 45 | static inline |
| 46 | void pgdat_resize_unlock(struct pglist_data *pgdat, unsigned long *flags) |
| 47 | { |
Dave Hansen | bdc8cb9 | 2005-10-29 18:16:53 -0700 | [diff] [blame] | 48 | spin_unlock_irqrestore(&pgdat->node_size_lock, *flags); |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 49 | } |
| 50 | static inline |
| 51 | void pgdat_resize_init(struct pglist_data *pgdat) |
| 52 | { |
| 53 | spin_lock_init(&pgdat->node_size_lock); |
| 54 | } |
Dave Hansen | bdc8cb9 | 2005-10-29 18:16:53 -0700 | [diff] [blame] | 55 | /* |
| 56 | * Zone resizing functions |
Lai Jiangshan | 511c2ab | 2012-12-11 16:03:16 -0800 | [diff] [blame] | 57 | * |
| 58 | * Note: any attempt to resize a zone should has pgdat_resize_lock() |
| 59 | * zone_span_writelock() both held. This ensure the size of a zone |
| 60 | * can't be changed while pgdat_resize_lock() held. |
Dave Hansen | bdc8cb9 | 2005-10-29 18:16:53 -0700 | [diff] [blame] | 61 | */ |
| 62 | static inline unsigned zone_span_seqbegin(struct zone *zone) |
| 63 | { |
| 64 | return read_seqbegin(&zone->span_seqlock); |
| 65 | } |
| 66 | static inline int zone_span_seqretry(struct zone *zone, unsigned iv) |
| 67 | { |
| 68 | return read_seqretry(&zone->span_seqlock, iv); |
| 69 | } |
| 70 | static inline void zone_span_writelock(struct zone *zone) |
| 71 | { |
| 72 | write_seqlock(&zone->span_seqlock); |
| 73 | } |
| 74 | static inline void zone_span_writeunlock(struct zone *zone) |
| 75 | { |
| 76 | write_sequnlock(&zone->span_seqlock); |
| 77 | } |
| 78 | static inline void zone_seqlock_init(struct zone *zone) |
| 79 | { |
| 80 | seqlock_init(&zone->span_seqlock); |
| 81 | } |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 82 | extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages); |
| 83 | extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages); |
| 84 | extern int add_one_highpage(struct page *page, int pfn, int bad_ppro); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 85 | /* VM interface that may be used by firmware interface */ |
Lai Jiangshan | 511c2ab | 2012-12-11 16:03:16 -0800 | [diff] [blame] | 86 | extern int online_pages(unsigned long, unsigned long, int); |
KAMEZAWA Hiroyuki | 0c0e619 | 2007-10-16 01:26:12 -0700 | [diff] [blame] | 87 | extern void __offline_isolated_pages(unsigned long, unsigned long); |
KAMEZAWA Hiroyuki | 48e9419 | 2007-10-16 01:26:14 -0700 | [diff] [blame] | 88 | |
Daniel Kiper | 9d0ad8c | 2011-07-25 17:12:05 -0700 | [diff] [blame] | 89 | typedef void (*online_page_callback_t)(struct page *page); |
| 90 | |
| 91 | extern int set_online_page_callback(online_page_callback_t callback); |
| 92 | extern int restore_online_page_callback(online_page_callback_t callback); |
| 93 | |
| 94 | extern void __online_page_set_limits(struct page *page); |
| 95 | extern void __online_page_increment_counters(struct page *page); |
| 96 | extern void __online_page_free(struct page *page); |
| 97 | |
Toshi Kani | 01b0f19 | 2013-11-12 15:07:25 -0800 | [diff] [blame] | 98 | extern int try_online_node(int nid); |
| 99 | |
KAMEZAWA Hiroyuki | 49ac825 | 2010-10-26 14:21:30 -0700 | [diff] [blame] | 100 | #ifdef CONFIG_MEMORY_HOTREMOVE |
| 101 | extern bool is_pageblock_removable_nolock(struct page *page); |
Wen Congyang | 24d335c | 2013-02-22 16:32:58 -0800 | [diff] [blame] | 102 | extern int arch_remove_memory(u64 start, u64 size); |
David Rientjes | 4edd7ce | 2013-04-29 15:08:22 -0700 | [diff] [blame] | 103 | extern int __remove_pages(struct zone *zone, unsigned long start_pfn, |
| 104 | unsigned long nr_pages); |
KAMEZAWA Hiroyuki | 49ac825 | 2010-10-26 14:21:30 -0700 | [diff] [blame] | 105 | #endif /* CONFIG_MEMORY_HOTREMOVE */ |
| 106 | |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 107 | /* reasonably generic interface to expand the physical pages in a zone */ |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 108 | extern int __add_pages(int nid, struct zone *zone, unsigned long start_pfn, |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 109 | unsigned long nr_pages); |
Yasunori Goto | bc02af9 | 2006-06-27 02:53:30 -0700 | [diff] [blame] | 110 | |
| 111 | #ifdef CONFIG_NUMA |
| 112 | extern int memory_add_physaddr_to_nid(u64 start); |
| 113 | #else |
| 114 | static inline int memory_add_physaddr_to_nid(u64 start) |
| 115 | { |
| 116 | return 0; |
| 117 | } |
| 118 | #endif |
| 119 | |
Yasunori Goto | 306d6cb | 2006-06-27 02:53:32 -0700 | [diff] [blame] | 120 | #ifdef CONFIG_HAVE_ARCH_NODEDATA_EXTENSION |
| 121 | /* |
| 122 | * For supporting node-hotadd, we have to allocate a new pgdat. |
| 123 | * |
| 124 | * If an arch has generic style NODE_DATA(), |
| 125 | * node_data[nid] = kzalloc() works well. But it depends on the architecture. |
| 126 | * |
| 127 | * In general, generic_alloc_nodedata() is used. |
| 128 | * Now, arch_free_nodedata() is just defined for error path of node_hot_add. |
| 129 | * |
| 130 | */ |
Yasunori Goto | dd0932d | 2006-06-27 02:53:40 -0700 | [diff] [blame] | 131 | extern pg_data_t *arch_alloc_nodedata(int nid); |
| 132 | extern void arch_free_nodedata(pg_data_t *pgdat); |
Yasunori Goto | 7049027 | 2006-06-27 02:53:39 -0700 | [diff] [blame] | 133 | extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat); |
Yasunori Goto | 306d6cb | 2006-06-27 02:53:32 -0700 | [diff] [blame] | 134 | |
| 135 | #else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ |
| 136 | |
| 137 | #define arch_alloc_nodedata(nid) generic_alloc_nodedata(nid) |
| 138 | #define arch_free_nodedata(pgdat) generic_free_nodedata(pgdat) |
| 139 | |
| 140 | #ifdef CONFIG_NUMA |
| 141 | /* |
| 142 | * If ARCH_HAS_NODEDATA_EXTENSION=n, this func is used to allocate pgdat. |
| 143 | * XXX: kmalloc_node() can't work well to get new node's memory at this time. |
| 144 | * Because, pgdat for the new node is not allocated/initialized yet itself. |
| 145 | * To use new node's memory, more consideration will be necessary. |
| 146 | */ |
| 147 | #define generic_alloc_nodedata(nid) \ |
| 148 | ({ \ |
| 149 | kzalloc(sizeof(pg_data_t), GFP_KERNEL); \ |
| 150 | }) |
| 151 | /* |
| 152 | * This definition is just for error path in node hotadd. |
| 153 | * For node hotremove, we have to replace this. |
| 154 | */ |
| 155 | #define generic_free_nodedata(pgdat) kfree(pgdat) |
| 156 | |
Yasunori Goto | 10ad400 | 2006-06-27 02:53:33 -0700 | [diff] [blame] | 157 | extern pg_data_t *node_data[]; |
| 158 | static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) |
| 159 | { |
| 160 | node_data[nid] = pgdat; |
| 161 | } |
| 162 | |
Yasunori Goto | 306d6cb | 2006-06-27 02:53:32 -0700 | [diff] [blame] | 163 | #else /* !CONFIG_NUMA */ |
| 164 | |
| 165 | /* never called */ |
| 166 | static inline pg_data_t *generic_alloc_nodedata(int nid) |
| 167 | { |
| 168 | BUG(); |
| 169 | return NULL; |
| 170 | } |
| 171 | static inline void generic_free_nodedata(pg_data_t *pgdat) |
| 172 | { |
| 173 | } |
Yasunori Goto | 10ad400 | 2006-06-27 02:53:33 -0700 | [diff] [blame] | 174 | static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) |
| 175 | { |
| 176 | } |
Yasunori Goto | 306d6cb | 2006-06-27 02:53:32 -0700 | [diff] [blame] | 177 | #endif /* CONFIG_NUMA */ |
| 178 | #endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ |
| 179 | |
Yasuaki Ishimatsu | 46723bf | 2013-02-22 16:33:00 -0800 | [diff] [blame] | 180 | #ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE |
| 181 | extern void register_page_bootmem_info_node(struct pglist_data *pgdat); |
| 182 | #else |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 183 | static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
| 184 | { |
| 185 | } |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 186 | #endif |
Yasuaki Ishimatsu | 46723bf | 2013-02-22 16:33:00 -0800 | [diff] [blame] | 187 | extern void put_page_bootmem(struct page *page); |
| 188 | extern void get_page_bootmem(unsigned long ingo, struct page *page, |
| 189 | unsigned long type); |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 190 | |
Vladimir Davydov | bfc8c90 | 2014-06-04 16:07:18 -0700 | [diff] [blame] | 191 | void get_online_mems(void); |
| 192 | void put_online_mems(void); |
KOSAKI Motohiro | 20d6c96 | 2010-12-02 14:31:19 -0800 | [diff] [blame] | 193 | |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 194 | #else /* ! CONFIG_MEMORY_HOTPLUG */ |
| 195 | /* |
| 196 | * Stub functions for when hotplug is off |
| 197 | */ |
| 198 | static inline void pgdat_resize_lock(struct pglist_data *p, unsigned long *f) {} |
| 199 | static inline void pgdat_resize_unlock(struct pglist_data *p, unsigned long *f) {} |
| 200 | static inline void pgdat_resize_init(struct pglist_data *pgdat) {} |
Dave Hansen | bdc8cb9 | 2005-10-29 18:16:53 -0700 | [diff] [blame] | 201 | |
| 202 | static inline unsigned zone_span_seqbegin(struct zone *zone) |
| 203 | { |
| 204 | return 0; |
| 205 | } |
| 206 | static inline int zone_span_seqretry(struct zone *zone, unsigned iv) |
| 207 | { |
| 208 | return 0; |
| 209 | } |
| 210 | static inline void zone_span_writelock(struct zone *zone) {} |
| 211 | static inline void zone_span_writeunlock(struct zone *zone) {} |
| 212 | static inline void zone_seqlock_init(struct zone *zone) {} |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 213 | |
| 214 | static inline int mhp_notimplemented(const char *func) |
| 215 | { |
| 216 | printk(KERN_WARNING "%s() called, with CONFIG_MEMORY_HOTPLUG disabled\n", func); |
| 217 | dump_stack(); |
| 218 | return -ENOSYS; |
| 219 | } |
| 220 | |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 221 | static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
| 222 | { |
| 223 | } |
| 224 | |
Toshi Kani | 01b0f19 | 2013-11-12 15:07:25 -0800 | [diff] [blame] | 225 | static inline int try_online_node(int nid) |
| 226 | { |
| 227 | return 0; |
| 228 | } |
| 229 | |
Vladimir Davydov | bfc8c90 | 2014-06-04 16:07:18 -0700 | [diff] [blame] | 230 | static inline void get_online_mems(void) {} |
| 231 | static inline void put_online_mems(void) {} |
KOSAKI Motohiro | 20d6c96 | 2010-12-02 14:31:19 -0800 | [diff] [blame] | 232 | |
Dave Hansen | bdc8cb9 | 2005-10-29 18:16:53 -0700 | [diff] [blame] | 233 | #endif /* ! CONFIG_MEMORY_HOTPLUG */ |
Andi Kleen | 9d99aaa | 2006-04-07 19:49:15 +0200 | [diff] [blame] | 234 | |
Badari Pulavarty | 5c755e9 | 2008-07-23 21:28:19 -0700 | [diff] [blame] | 235 | #ifdef CONFIG_MEMORY_HOTREMOVE |
| 236 | |
| 237 | extern int is_mem_section_removable(unsigned long pfn, unsigned long nr_pages); |
Wen Congyang | 90b30cd | 2013-02-22 16:33:27 -0800 | [diff] [blame] | 238 | extern void try_offline_node(int nid); |
Rafael J. Wysocki | aba6efc | 2013-06-01 22:24:07 +0200 | [diff] [blame] | 239 | extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
| 240 | extern void remove_memory(int nid, u64 start, u64 size); |
Badari Pulavarty | 5c755e9 | 2008-07-23 21:28:19 -0700 | [diff] [blame] | 241 | |
| 242 | #else |
| 243 | static inline int is_mem_section_removable(unsigned long pfn, |
| 244 | unsigned long nr_pages) |
| 245 | { |
| 246 | return 0; |
| 247 | } |
Wen Congyang | 90b30cd | 2013-02-22 16:33:27 -0800 | [diff] [blame] | 248 | |
| 249 | static inline void try_offline_node(int nid) {} |
Rafael J. Wysocki | aba6efc | 2013-06-01 22:24:07 +0200 | [diff] [blame] | 250 | |
| 251 | static inline int offline_pages(unsigned long start_pfn, unsigned long nr_pages) |
| 252 | { |
| 253 | return -EINVAL; |
| 254 | } |
| 255 | |
| 256 | static inline void remove_memory(int nid, u64 start, u64 size) {} |
Badari Pulavarty | 5c755e9 | 2008-07-23 21:28:19 -0700 | [diff] [blame] | 257 | #endif /* CONFIG_MEMORY_HOTREMOVE */ |
| 258 | |
Rafael J. Wysocki | e2ff394 | 2013-05-08 00:29:49 +0200 | [diff] [blame] | 259 | extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, |
| 260 | void *arg, int (*func)(struct memory_block *, void *)); |
Yasunori Goto | bc02af9 | 2006-06-27 02:53:30 -0700 | [diff] [blame] | 261 | extern int add_memory(int nid, u64 start, u64 size); |
Wang Nan | 6326440 | 2014-08-06 16:07:36 -0700 | [diff] [blame] | 262 | extern int zone_for_memory(int nid, u64 start, u64 size, int zone_default); |
Yasunori Goto | bc02af9 | 2006-06-27 02:53:30 -0700 | [diff] [blame] | 263 | extern int arch_add_memory(int nid, u64 start, u64 size); |
Wen Congyang | a16cee1 | 2012-10-08 16:33:58 -0700 | [diff] [blame] | 264 | extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
Yasuaki Ishimatsu | 6677e3e | 2013-02-22 16:32:52 -0800 | [diff] [blame] | 265 | extern bool is_memblock_offlined(struct memory_block *mem); |
Rafael J. Wysocki | 242831e | 2013-05-27 12:58:46 +0200 | [diff] [blame] | 266 | extern void remove_memory(int nid, u64 start, u64 size); |
Zhang Yanfei | 85b35fe | 2013-11-12 15:07:42 -0800 | [diff] [blame] | 267 | extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn); |
Badari Pulavarty | ea01ea9 | 2008-04-28 02:12:01 -0700 | [diff] [blame] | 268 | extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms); |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 269 | extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map, |
| 270 | unsigned long pnum); |
Andi Kleen | 9d99aaa | 2006-04-07 19:49:15 +0200 | [diff] [blame] | 271 | |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 272 | #endif /* __LINUX_MEMORY_HOTPLUG_H */ |