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; |
David Vrabel | 62cedb9 | 2015-06-25 16:35:49 +0100 | [diff] [blame] | 14 | struct resource; |
KAMEZAWA Hiroyuki | 7867930 | 2006-03-06 15:42:49 -0800 | [diff] [blame] | 15 | |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 16 | #ifdef CONFIG_MEMORY_HOTPLUG |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 17 | |
| 18 | /* |
Andrea Arcangeli | 5f24ce5 | 2011-01-13 15:47:00 -0800 | [diff] [blame] | 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. |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 21 | */ |
Andrea Arcangeli | 5f24ce5 | 2011-01-13 15:47:00 -0800 | [diff] [blame] | 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 | }; |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 29 | |
Tang Chen | 4f7c6b4 | 2014-08-06 16:05:13 -0700 | [diff] [blame] | 30 | /* Types for control the zone type of onlined and offlined memory */ |
Lai Jiangshan | 511c2ab | 2012-12-11 16:03:16 -0800 | [diff] [blame] | 31 | enum { |
Tang Chen | 4f7c6b4 | 2014-08-06 16:05:13 -0700 | [diff] [blame] | 32 | MMOP_OFFLINE = -1, |
| 33 | MMOP_ONLINE_KEEP, |
| 34 | MMOP_ONLINE_KERNEL, |
| 35 | MMOP_ONLINE_MOVABLE, |
Lai Jiangshan | 511c2ab | 2012-12-11 16:03:16 -0800 | [diff] [blame] | 36 | }; |
| 37 | |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 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 | { |
Dave Hansen | bdc8cb9 | 2005-10-29 18:16:53 -0700 | [diff] [blame] | 49 | spin_unlock_irqrestore(&pgdat->node_size_lock, *flags); |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 50 | } |
| 51 | static inline |
| 52 | void pgdat_resize_init(struct pglist_data *pgdat) |
| 53 | { |
| 54 | spin_lock_init(&pgdat->node_size_lock); |
| 55 | } |
Dave Hansen | bdc8cb9 | 2005-10-29 18:16:53 -0700 | [diff] [blame] | 56 | /* |
| 57 | * Zone resizing functions |
Lai Jiangshan | 511c2ab | 2012-12-11 16:03:16 -0800 | [diff] [blame] | 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. |
Dave Hansen | bdc8cb9 | 2005-10-29 18:16:53 -0700 | [diff] [blame] | 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 | } |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 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); |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 86 | /* VM interface that may be used by firmware interface */ |
Lai Jiangshan | 511c2ab | 2012-12-11 16:03:16 -0800 | [diff] [blame] | 87 | extern int online_pages(unsigned long, unsigned long, int); |
Zhang Zhen | ed2f240 | 2014-10-09 15:26:31 -0700 | [diff] [blame] | 88 | extern int test_pages_in_a_zone(unsigned long, unsigned long); |
KAMEZAWA Hiroyuki | 0c0e619 | 2007-10-16 01:26:12 -0700 | [diff] [blame] | 89 | extern void __offline_isolated_pages(unsigned long, unsigned long); |
KAMEZAWA Hiroyuki | 48e9419 | 2007-10-16 01:26:14 -0700 | [diff] [blame] | 90 | |
Daniel Kiper | 9d0ad8c | 2011-07-25 17:12:05 -0700 | [diff] [blame] | 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 | |
Toshi Kani | 01b0f19 | 2013-11-12 15:07:25 -0800 | [diff] [blame] | 100 | extern int try_online_node(int nid); |
| 101 | |
Vitaly Kuznetsov | 31bc385 | 2016-03-15 14:56:48 -0700 | [diff] [blame] | 102 | extern bool memhp_auto_online; |
| 103 | |
KAMEZAWA Hiroyuki | 49ac825 | 2010-10-26 14:21:30 -0700 | [diff] [blame] | 104 | #ifdef CONFIG_MEMORY_HOTREMOVE |
| 105 | extern bool is_pageblock_removable_nolock(struct page *page); |
Wen Congyang | 24d335c | 2013-02-22 16:32:58 -0800 | [diff] [blame] | 106 | extern int arch_remove_memory(u64 start, u64 size); |
David Rientjes | 4edd7ce | 2013-04-29 15:08:22 -0700 | [diff] [blame] | 107 | extern int __remove_pages(struct zone *zone, unsigned long start_pfn, |
| 108 | unsigned long nr_pages); |
KAMEZAWA Hiroyuki | 49ac825 | 2010-10-26 14:21:30 -0700 | [diff] [blame] | 109 | #endif /* CONFIG_MEMORY_HOTREMOVE */ |
| 110 | |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 111 | /* reasonably generic interface to expand the physical pages in a zone */ |
Gary Hade | c04fc58 | 2009-01-06 14:39:14 -0800 | [diff] [blame] | 112 | 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] | 113 | unsigned long nr_pages); |
Yasunori Goto | bc02af9 | 2006-06-27 02:53:30 -0700 | [diff] [blame] | 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 | |
Yasunori Goto | 306d6cb | 2006-06-27 02:53:32 -0700 | [diff] [blame] | 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 | */ |
Yasunori Goto | dd0932d | 2006-06-27 02:53:40 -0700 | [diff] [blame] | 135 | extern pg_data_t *arch_alloc_nodedata(int nid); |
| 136 | extern void arch_free_nodedata(pg_data_t *pgdat); |
Yasunori Goto | 7049027 | 2006-06-27 02:53:39 -0700 | [diff] [blame] | 137 | extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat); |
Yasunori Goto | 306d6cb | 2006-06-27 02:53:32 -0700 | [diff] [blame] | 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 | |
Yasunori Goto | 10ad400 | 2006-06-27 02:53:33 -0700 | [diff] [blame] | 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 | |
Yasunori Goto | 306d6cb | 2006-06-27 02:53:32 -0700 | [diff] [blame] | 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 | } |
Yasunori Goto | 10ad400 | 2006-06-27 02:53:33 -0700 | [diff] [blame] | 178 | static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) |
| 179 | { |
| 180 | } |
Yasunori Goto | 306d6cb | 2006-06-27 02:53:32 -0700 | [diff] [blame] | 181 | #endif /* CONFIG_NUMA */ |
| 182 | #endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ |
| 183 | |
Yasuaki Ishimatsu | 46723bf | 2013-02-22 16:33:00 -0800 | [diff] [blame] | 184 | #ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE |
Linus Torvalds | 7ded384 | 2016-05-27 15:23:32 -0700 | [diff] [blame] | 185 | extern void __init register_page_bootmem_info_node(struct pglist_data *pgdat); |
Yasuaki Ishimatsu | 46723bf | 2013-02-22 16:33:00 -0800 | [diff] [blame] | 186 | #else |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 187 | static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
| 188 | { |
| 189 | } |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 190 | #endif |
Yasuaki Ishimatsu | 46723bf | 2013-02-22 16:33:00 -0800 | [diff] [blame] | 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); |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 194 | |
Vladimir Davydov | bfc8c90 | 2014-06-04 16:07:18 -0700 | [diff] [blame] | 195 | void get_online_mems(void); |
| 196 | void put_online_mems(void); |
KOSAKI Motohiro | 20d6c96 | 2010-12-02 14:31:19 -0800 | [diff] [blame] | 197 | |
David Rientjes | 30467e0 | 2015-04-14 15:45:11 -0700 | [diff] [blame] | 198 | void mem_hotplug_begin(void); |
| 199 | void mem_hotplug_done(void); |
| 200 | |
Joonsoo Kim | 7cf91a9 | 2016-03-15 14:57:51 -0700 | [diff] [blame] | 201 | extern void set_zone_contiguous(struct zone *zone); |
| 202 | extern void clear_zone_contiguous(struct zone *zone); |
| 203 | |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 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) {} |
Dave Hansen | bdc8cb9 | 2005-10-29 18:16:53 -0700 | [diff] [blame] | 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) {} |
Dave Hansen | 3947be1 | 2005-10-29 18:16:54 -0700 | [diff] [blame] | 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 | |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 231 | static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
| 232 | { |
| 233 | } |
| 234 | |
Toshi Kani | 01b0f19 | 2013-11-12 15:07:25 -0800 | [diff] [blame] | 235 | static inline int try_online_node(int nid) |
| 236 | { |
| 237 | return 0; |
| 238 | } |
| 239 | |
Vladimir Davydov | bfc8c90 | 2014-06-04 16:07:18 -0700 | [diff] [blame] | 240 | static inline void get_online_mems(void) {} |
| 241 | static inline void put_online_mems(void) {} |
KOSAKI Motohiro | 20d6c96 | 2010-12-02 14:31:19 -0800 | [diff] [blame] | 242 | |
David Rientjes | 30467e0 | 2015-04-14 15:45:11 -0700 | [diff] [blame] | 243 | static inline void mem_hotplug_begin(void) {} |
| 244 | static inline void mem_hotplug_done(void) {} |
| 245 | |
Dave Hansen | bdc8cb9 | 2005-10-29 18:16:53 -0700 | [diff] [blame] | 246 | #endif /* ! CONFIG_MEMORY_HOTPLUG */ |
Andi Kleen | 9d99aaa | 2006-04-07 19:49:15 +0200 | [diff] [blame] | 247 | |
Badari Pulavarty | 5c755e9 | 2008-07-23 21:28:19 -0700 | [diff] [blame] | 248 | #ifdef CONFIG_MEMORY_HOTREMOVE |
| 249 | |
Yaowei Bai | c98940f | 2016-05-19 17:11:26 -0700 | [diff] [blame] | 250 | extern bool is_mem_section_removable(unsigned long pfn, unsigned long nr_pages); |
Wen Congyang | 90b30cd | 2013-02-22 16:33:27 -0800 | [diff] [blame] | 251 | extern void try_offline_node(int nid); |
Rafael J. Wysocki | aba6efc | 2013-06-01 22:24:07 +0200 | [diff] [blame] | 252 | extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
| 253 | extern void remove_memory(int nid, u64 start, u64 size); |
Badari Pulavarty | 5c755e9 | 2008-07-23 21:28:19 -0700 | [diff] [blame] | 254 | |
| 255 | #else |
Yaowei Bai | c98940f | 2016-05-19 17:11:26 -0700 | [diff] [blame] | 256 | static inline bool is_mem_section_removable(unsigned long pfn, |
Badari Pulavarty | 5c755e9 | 2008-07-23 21:28:19 -0700 | [diff] [blame] | 257 | unsigned long nr_pages) |
| 258 | { |
Yaowei Bai | c98940f | 2016-05-19 17:11:26 -0700 | [diff] [blame] | 259 | return false; |
Badari Pulavarty | 5c755e9 | 2008-07-23 21:28:19 -0700 | [diff] [blame] | 260 | } |
Wen Congyang | 90b30cd | 2013-02-22 16:33:27 -0800 | [diff] [blame] | 261 | |
| 262 | static inline void try_offline_node(int nid) {} |
Rafael J. Wysocki | aba6efc | 2013-06-01 22:24:07 +0200 | [diff] [blame] | 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) {} |
Badari Pulavarty | 5c755e9 | 2008-07-23 21:28:19 -0700 | [diff] [blame] | 270 | #endif /* CONFIG_MEMORY_HOTREMOVE */ |
| 271 | |
Rafael J. Wysocki | e2ff394 | 2013-05-08 00:29:49 +0200 | [diff] [blame] | 272 | extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, |
| 273 | void *arg, int (*func)(struct memory_block *, void *)); |
Yasunori Goto | bc02af9 | 2006-06-27 02:53:30 -0700 | [diff] [blame] | 274 | extern int add_memory(int nid, u64 start, u64 size); |
Vitaly Kuznetsov | 31bc385 | 2016-03-15 14:56:48 -0700 | [diff] [blame] | 275 | extern int add_memory_resource(int nid, struct resource *resource, bool online); |
Dan Williams | 033fbae | 2015-08-09 15:29:06 -0400 | [diff] [blame] | 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); |
Wen Congyang | a16cee1 | 2012-10-08 16:33:58 -0700 | [diff] [blame] | 279 | extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
Yasuaki Ishimatsu | 6677e3e | 2013-02-22 16:32:52 -0800 | [diff] [blame] | 280 | extern bool is_memblock_offlined(struct memory_block *mem); |
Rafael J. Wysocki | 242831e | 2013-05-27 12:58:46 +0200 | [diff] [blame] | 281 | extern void remove_memory(int nid, u64 start, u64 size); |
Zhang Yanfei | 85b35fe | 2013-11-12 15:07:42 -0800 | [diff] [blame] | 282 | extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn); |
Dan Williams | 4b94ffd | 2016-01-15 16:56:22 -0800 | [diff] [blame] | 283 | extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms, |
| 284 | unsigned long map_offset); |
Yasunori Goto | 0475327 | 2008-04-28 02:13:31 -0700 | [diff] [blame] | 285 | extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map, |
| 286 | unsigned long pnum); |
Andi Kleen | 9d99aaa | 2006-04-07 19:49:15 +0200 | [diff] [blame] | 287 | |
Dave Hansen | 208d54e | 2005-10-29 18:16:52 -0700 | [diff] [blame] | 288 | #endif /* __LINUX_MEMORY_HOTPLUG_H */ |