]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * include/linux/node.h - generic node definition | |
3 | * | |
4 | * This is mainly for topological representation. We define the | |
5 | * basic 'struct node' here, which can be embedded in per-arch | |
6 | * definitions of processors. | |
7 | * | |
8 | * Basic handling of the devices is done in drivers/base/node.c | |
9 | * and system devices are handled in drivers/base/sys.c. | |
10 | * | |
11 | * Nodes are exported via driverfs in the class/node/devices/ | |
12 | * directory. | |
1da177e4 LT |
13 | */ |
14 | #ifndef _LINUX_NODE_H_ | |
15 | #define _LINUX_NODE_H_ | |
16 | ||
10fbcf4c | 17 | #include <linux/device.h> |
1da177e4 | 18 | #include <linux/cpumask.h> |
39da08cb | 19 | #include <linux/workqueue.h> |
1da177e4 LT |
20 | |
21 | struct node { | |
10fbcf4c | 22 | struct device dev; |
39da08cb LS |
23 | |
24 | #if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HUGETLBFS) | |
25 | struct work_struct node_work; | |
26 | #endif | |
1da177e4 LT |
27 | }; |
28 | ||
c04fc586 | 29 | struct memory_block; |
8732794b | 30 | extern struct node *node_devices[]; |
9a305230 | 31 | typedef void (*node_registration_func_t)(struct node *); |
0fc44159 | 32 | |
9037a993 MH |
33 | #if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_NUMA) |
34 | extern int link_mem_sections(int nid, unsigned long start_pfn, unsigned long nr_pages); | |
35 | #else | |
36 | static inline int link_mem_sections(int nid, unsigned long start_pfn, unsigned long nr_pages) | |
37 | { | |
38 | return 0; | |
39 | } | |
40 | #endif | |
41 | ||
4b45099b | 42 | extern void unregister_node(struct node *node); |
36920e06 | 43 | #ifdef CONFIG_NUMA |
9037a993 MH |
44 | /* Core of the node registration - only memory hotplug should use this */ |
45 | extern int __register_one_node(int nid); | |
46 | ||
47 | /* Registers an online node */ | |
48 | static inline int register_one_node(int nid) | |
49 | { | |
50 | int error = 0; | |
51 | ||
52 | if (node_online(nid)) { | |
53 | struct pglist_data *pgdat = NODE_DATA(nid); | |
54 | ||
55 | error = __register_one_node(nid); | |
56 | if (error) | |
57 | return error; | |
58 | /* link memory sections under this node */ | |
59 | error = link_mem_sections(nid, pgdat->node_start_pfn, pgdat->node_spanned_pages); | |
60 | } | |
61 | ||
62 | return error; | |
63 | } | |
64 | ||
0fc44159 | 65 | extern void unregister_one_node(int nid); |
76b67ed9 KH |
66 | extern int register_cpu_under_node(unsigned int cpu, unsigned int nid); |
67 | extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid); | |
c04fc586 GH |
68 | extern int register_mem_sect_under_node(struct memory_block *mem_blk, |
69 | int nid); | |
d3360164 NF |
70 | extern int unregister_mem_sect_under_nodes(struct memory_block *mem_blk, |
71 | unsigned long phys_index); | |
9a305230 LS |
72 | |
73 | #ifdef CONFIG_HUGETLBFS | |
74 | extern void register_hugetlbfs_with_node(node_registration_func_t doregister, | |
75 | node_registration_func_t unregister); | |
76 | #endif | |
76b67ed9 | 77 | #else |
9037a993 MH |
78 | static inline int __register_one_node(int nid) |
79 | { | |
80 | return 0; | |
81 | } | |
36920e06 KH |
82 | static inline int register_one_node(int nid) |
83 | { | |
84 | return 0; | |
85 | } | |
86 | static inline int unregister_one_node(int nid) | |
87 | { | |
88 | return 0; | |
89 | } | |
76b67ed9 KH |
90 | static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid) |
91 | { | |
92 | return 0; | |
93 | } | |
94 | static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid) | |
95 | { | |
96 | return 0; | |
97 | } | |
c04fc586 GH |
98 | static inline int register_mem_sect_under_node(struct memory_block *mem_blk, |
99 | int nid) | |
100 | { | |
101 | return 0; | |
102 | } | |
d3360164 NF |
103 | static inline int unregister_mem_sect_under_nodes(struct memory_block *mem_blk, |
104 | unsigned long phys_index) | |
c04fc586 GH |
105 | { |
106 | return 0; | |
107 | } | |
9a305230 LS |
108 | |
109 | static inline void register_hugetlbfs_with_node(node_registration_func_t reg, | |
110 | node_registration_func_t unreg) | |
111 | { | |
112 | } | |
76b67ed9 | 113 | #endif |
1da177e4 | 114 | |
10fbcf4c | 115 | #define to_node(device) container_of(device, struct node, dev) |
1da177e4 LT |
116 | |
117 | #endif /* _LINUX_NODE_H_ */ |