Commit | Line | Data |
---|---|---|
3947be19 DH |
1 | /* |
2 | * include/linux/memory.h - generic memory definition | |
3 | * | |
4 | * This is mainly for topological representation. We define the | |
5 | * basic "struct memory_block" here, which can be embedded in per-arch | |
6 | * definitions or NUMA information. | |
7 | * | |
8 | * Basic handling of the devices is done in drivers/base/memory.c | |
9 | * and system devices are handled in drivers/base/sys.c. | |
10 | * | |
11 | * Memory block are exported via sysfs in the class/memory/devices/ | |
12 | * directory. | |
13 | * | |
14 | */ | |
15 | #ifndef _LINUX_MEMORY_H_ | |
16 | #define _LINUX_MEMORY_H_ | |
17 | ||
18 | #include <linux/sysdev.h> | |
19 | #include <linux/node.h> | |
20 | #include <linux/compiler.h> | |
da19cbcf | 21 | #include <linux/mutex.h> |
3947be19 DH |
22 | |
23 | struct memory_block { | |
24 | unsigned long phys_index; | |
25 | unsigned long state; | |
26 | /* | |
27 | * This serializes all state change requests. It isn't | |
28 | * held during creation because the control files are | |
29 | * created long after the critical areas during | |
30 | * initialization. | |
31 | */ | |
da19cbcf | 32 | struct mutex state_mutex; |
3947be19 DH |
33 | int phys_device; /* to which fru does this belong? */ |
34 | void *hw; /* optional pointer to fw/hw data */ | |
35 | int (*phys_callback)(struct memory_block *); | |
36 | struct sys_device sysdev; | |
37 | }; | |
38 | ||
39 | /* These states are exposed to userspace as text strings in sysfs */ | |
40 | #define MEM_ONLINE (1<<0) /* exposed to userspace */ | |
41 | #define MEM_GOING_OFFLINE (1<<1) /* exposed to userspace */ | |
42 | #define MEM_OFFLINE (1<<2) /* exposed to userspace */ | |
7b78d335 YG |
43 | #define MEM_GOING_ONLINE (1<<3) |
44 | #define MEM_CANCEL_ONLINE (1<<4) | |
45 | #define MEM_CANCEL_OFFLINE (1<<5) | |
3947be19 | 46 | |
7b78d335 YG |
47 | struct memory_notify { |
48 | unsigned long start_pfn; | |
49 | unsigned long nr_pages; | |
50 | int status_change_nid; | |
51 | }; | |
3947be19 | 52 | |
8c65b4a6 TS |
53 | struct notifier_block; |
54 | struct mem_section; | |
55 | ||
0c40ba4f ND |
56 | /* |
57 | * Priorities for the hotplug memory callback routines (stored in decreasing | |
58 | * order in the callback chain) | |
59 | */ | |
60 | #define SLAB_CALLBACK_PRI 1 | |
b6b337ad | 61 | #define IPC_CALLBACK_PRI 10 |
0c40ba4f | 62 | |
53947027 | 63 | #ifndef CONFIG_MEMORY_HOTPLUG_SPARSE |
3947be19 DH |
64 | static inline int memory_dev_init(void) |
65 | { | |
66 | return 0; | |
67 | } | |
68 | static inline int register_memory_notifier(struct notifier_block *nb) | |
69 | { | |
70 | return 0; | |
71 | } | |
72 | static inline void unregister_memory_notifier(struct notifier_block *nb) | |
73 | { | |
74 | } | |
7b78d335 YG |
75 | static inline int memory_notify(unsigned long val, void *v) |
76 | { | |
77 | return 0; | |
78 | } | |
3947be19 | 79 | #else |
7b78d335 YG |
80 | extern int register_memory_notifier(struct notifier_block *nb); |
81 | extern void unregister_memory_notifier(struct notifier_block *nb); | |
c04fc586 | 82 | extern int register_new_memory(int, struct mem_section *); |
3947be19 DH |
83 | extern int unregister_memory_section(struct mem_section *); |
84 | extern int memory_dev_init(void); | |
b792de39 | 85 | extern int remove_memory_block(unsigned long, struct mem_section *, int); |
7b78d335 | 86 | extern int memory_notify(unsigned long val, void *v); |
c04fc586 | 87 | extern struct memory_block *find_memory_block(struct mem_section *); |
3947be19 | 88 | #define CONFIG_MEM_BLOCK_SIZE (PAGES_PER_SECTION<<PAGE_SHIFT) |
c04fc586 | 89 | enum mem_add_context { BOOT, HOTPLUG }; |
53947027 | 90 | #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ |
3947be19 | 91 | |
b9049e23 | 92 | #ifdef CONFIG_MEMORY_HOTPLUG |
3947be19 | 93 | #define hotplug_memory_notifier(fn, pri) { \ |
02d0e675 | 94 | static __meminitdata struct notifier_block fn##_mem_nb =\ |
3947be19 DH |
95 | { .notifier_call = fn, .priority = pri }; \ |
96 | register_memory_notifier(&fn##_mem_nb); \ | |
97 | } | |
b9049e23 YG |
98 | #else |
99 | #define hotplug_memory_notifier(fn, pri) do { } while (0) | |
100 | #endif | |
3947be19 DH |
101 | |
102 | #endif /* _LINUX_MEMORY_H_ */ |