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283 lines
8.4 KiB
283 lines
8.4 KiB
#ifndef __LINUX_MEMORY_HOTPLUG_H |
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#define __LINUX_MEMORY_HOTPLUG_H |
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#include <linux/mmzone.h> |
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#include <linux/spinlock.h> |
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#include <linux/notifier.h> |
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#include <linux/bug.h> |
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struct page; |
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struct zone; |
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struct pglist_data; |
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struct mem_section; |
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struct memory_block; |
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struct resource; |
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#ifdef CONFIG_MEMORY_HOTPLUG |
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/* |
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* Types for free bootmem stored in page->lru.next. These have to be in |
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* some random range in unsigned long space for debugging purposes. |
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*/ |
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enum { |
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MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 12, |
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SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE, |
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MIX_SECTION_INFO, |
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NODE_INFO, |
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MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO, |
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}; |
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/* Types for control the zone type of onlined and offlined memory */ |
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enum { |
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MMOP_OFFLINE = -1, |
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MMOP_ONLINE_KEEP, |
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MMOP_ONLINE_KERNEL, |
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MMOP_ONLINE_MOVABLE, |
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}; |
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/* |
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* pgdat resizing functions |
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*/ |
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static inline |
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void pgdat_resize_lock(struct pglist_data *pgdat, unsigned long *flags) |
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{ |
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spin_lock_irqsave(&pgdat->node_size_lock, *flags); |
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} |
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static inline |
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void pgdat_resize_unlock(struct pglist_data *pgdat, unsigned long *flags) |
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{ |
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spin_unlock_irqrestore(&pgdat->node_size_lock, *flags); |
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} |
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static inline |
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void pgdat_resize_init(struct pglist_data *pgdat) |
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{ |
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spin_lock_init(&pgdat->node_size_lock); |
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} |
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/* |
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* Zone resizing functions |
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* |
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* Note: any attempt to resize a zone should has pgdat_resize_lock() |
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* zone_span_writelock() both held. This ensure the size of a zone |
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* can't be changed while pgdat_resize_lock() held. |
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*/ |
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static inline unsigned zone_span_seqbegin(struct zone *zone) |
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{ |
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return read_seqbegin(&zone->span_seqlock); |
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} |
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static inline int zone_span_seqretry(struct zone *zone, unsigned iv) |
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{ |
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return read_seqretry(&zone->span_seqlock, iv); |
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} |
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static inline void zone_span_writelock(struct zone *zone) |
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{ |
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write_seqlock(&zone->span_seqlock); |
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} |
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static inline void zone_span_writeunlock(struct zone *zone) |
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{ |
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write_sequnlock(&zone->span_seqlock); |
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} |
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static inline void zone_seqlock_init(struct zone *zone) |
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{ |
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seqlock_init(&zone->span_seqlock); |
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} |
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extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages); |
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extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages); |
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extern int add_one_highpage(struct page *page, int pfn, int bad_ppro); |
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/* VM interface that may be used by firmware interface */ |
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extern int online_pages(unsigned long, unsigned long, int); |
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extern int test_pages_in_a_zone(unsigned long start_pfn, unsigned long end_pfn, |
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unsigned long *valid_start, unsigned long *valid_end); |
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extern void __offline_isolated_pages(unsigned long, unsigned long); |
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typedef void (*online_page_callback_t)(struct page *page); |
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extern int set_online_page_callback(online_page_callback_t callback); |
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extern int restore_online_page_callback(online_page_callback_t callback); |
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extern void __online_page_set_limits(struct page *page); |
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extern void __online_page_increment_counters(struct page *page); |
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extern void __online_page_free(struct page *page); |
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extern int try_online_node(int nid); |
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#ifdef CONFIG_MEMORY_HOTREMOVE |
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extern bool is_pageblock_removable_nolock(struct page *page); |
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extern int arch_remove_memory(u64 start, u64 size); |
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extern int __remove_pages(struct zone *zone, unsigned long start_pfn, |
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unsigned long nr_pages); |
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#endif /* CONFIG_MEMORY_HOTREMOVE */ |
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/* reasonably generic interface to expand the physical pages in a zone */ |
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extern int __add_pages(int nid, struct zone *zone, unsigned long start_pfn, |
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unsigned long nr_pages); |
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#ifdef CONFIG_NUMA |
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extern int memory_add_physaddr_to_nid(u64 start); |
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#else |
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static inline int memory_add_physaddr_to_nid(u64 start) |
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{ |
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return 0; |
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} |
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#endif |
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#ifdef CONFIG_HAVE_ARCH_NODEDATA_EXTENSION |
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/* |
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* For supporting node-hotadd, we have to allocate a new pgdat. |
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* |
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* If an arch has generic style NODE_DATA(), |
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* node_data[nid] = kzalloc() works well. But it depends on the architecture. |
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* |
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* In general, generic_alloc_nodedata() is used. |
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* Now, arch_free_nodedata() is just defined for error path of node_hot_add. |
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* |
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*/ |
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extern pg_data_t *arch_alloc_nodedata(int nid); |
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extern void arch_free_nodedata(pg_data_t *pgdat); |
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extern void arch_refresh_nodedata(int nid, pg_data_t *pgdat); |
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#else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ |
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#define arch_alloc_nodedata(nid) generic_alloc_nodedata(nid) |
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#define arch_free_nodedata(pgdat) generic_free_nodedata(pgdat) |
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#ifdef CONFIG_NUMA |
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/* |
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* If ARCH_HAS_NODEDATA_EXTENSION=n, this func is used to allocate pgdat. |
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* XXX: kmalloc_node() can't work well to get new node's memory at this time. |
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* Because, pgdat for the new node is not allocated/initialized yet itself. |
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* To use new node's memory, more consideration will be necessary. |
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*/ |
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#define generic_alloc_nodedata(nid) \ |
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({ \ |
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kzalloc(sizeof(pg_data_t), GFP_KERNEL); \ |
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}) |
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/* |
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* This definition is just for error path in node hotadd. |
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* For node hotremove, we have to replace this. |
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*/ |
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#define generic_free_nodedata(pgdat) kfree(pgdat) |
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extern pg_data_t *node_data[]; |
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static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) |
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{ |
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node_data[nid] = pgdat; |
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} |
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#else /* !CONFIG_NUMA */ |
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/* never called */ |
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static inline pg_data_t *generic_alloc_nodedata(int nid) |
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{ |
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BUG(); |
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return NULL; |
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} |
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static inline void generic_free_nodedata(pg_data_t *pgdat) |
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{ |
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} |
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static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat) |
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{ |
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} |
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#endif /* CONFIG_NUMA */ |
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#endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */ |
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#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE |
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extern void register_page_bootmem_info_node(struct pglist_data *pgdat); |
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#else |
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static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
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{ |
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} |
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#endif |
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extern void put_page_bootmem(struct page *page); |
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extern void get_page_bootmem(unsigned long ingo, struct page *page, |
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unsigned long type); |
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void get_online_mems(void); |
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void put_online_mems(void); |
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void mem_hotplug_begin(void); |
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void mem_hotplug_done(void); |
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#else /* ! CONFIG_MEMORY_HOTPLUG */ |
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/* |
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* Stub functions for when hotplug is off |
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*/ |
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static inline void pgdat_resize_lock(struct pglist_data *p, unsigned long *f) {} |
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static inline void pgdat_resize_unlock(struct pglist_data *p, unsigned long *f) {} |
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static inline void pgdat_resize_init(struct pglist_data *pgdat) {} |
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static inline unsigned zone_span_seqbegin(struct zone *zone) |
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{ |
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return 0; |
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} |
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static inline int zone_span_seqretry(struct zone *zone, unsigned iv) |
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{ |
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return 0; |
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} |
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static inline void zone_span_writelock(struct zone *zone) {} |
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static inline void zone_span_writeunlock(struct zone *zone) {} |
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static inline void zone_seqlock_init(struct zone *zone) {} |
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static inline int mhp_notimplemented(const char *func) |
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{ |
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printk(KERN_WARNING "%s() called, with CONFIG_MEMORY_HOTPLUG disabled\n", func); |
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dump_stack(); |
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return -ENOSYS; |
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} |
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static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
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{ |
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} |
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static inline int try_online_node(int nid) |
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{ |
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return 0; |
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} |
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static inline void get_online_mems(void) {} |
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static inline void put_online_mems(void) {} |
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static inline void mem_hotplug_begin(void) {} |
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static inline void mem_hotplug_done(void) {} |
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#endif /* ! CONFIG_MEMORY_HOTPLUG */ |
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#ifdef CONFIG_MEMORY_HOTREMOVE |
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extern int is_mem_section_removable(unsigned long pfn, unsigned long nr_pages); |
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extern void try_offline_node(int nid); |
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extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
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extern void remove_memory(int nid, u64 start, u64 size); |
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#else |
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static inline int is_mem_section_removable(unsigned long pfn, |
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unsigned long nr_pages) |
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{ |
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return 0; |
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} |
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static inline void try_offline_node(int nid) {} |
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static inline int offline_pages(unsigned long start_pfn, unsigned long nr_pages) |
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{ |
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return -EINVAL; |
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} |
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static inline void remove_memory(int nid, u64 start, u64 size) {} |
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#endif /* CONFIG_MEMORY_HOTREMOVE */ |
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extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, |
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void *arg, int (*func)(struct memory_block *, void *)); |
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extern int add_memory(int nid, u64 start, u64 size); |
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extern int add_memory_resource(int nid, struct resource *resource); |
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extern int zone_for_memory(int nid, u64 start, u64 size, int zone_default, |
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bool for_device); |
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extern int arch_add_memory(int nid, u64 start, u64 size, bool for_device); |
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extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages); |
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extern bool is_memblock_offlined(struct memory_block *mem); |
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extern void remove_memory(int nid, u64 start, u64 size); |
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extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn); |
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extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms); |
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extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map, |
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unsigned long pnum); |
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#endif /* __LINUX_MEMORY_HOTPLUG_H */
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