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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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.
13 *
14 * Per-node interfaces can be implemented using a struct device_interface.
15 * See the following for how to do this:
16 * - drivers/base/intf.c
17 * - Documentation/driver-model/interface.txt
18 */
19#ifndef _LINUX_NODE_H_
20#define _LINUX_NODE_H_
21
22#include <linux/sysdev.h>
23#include <linux/cpumask.h>
Lee Schermerhorn39da08c2009-12-14 17:58:36 -080024#include <linux/workqueue.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
26struct node {
27 struct sys_device sysdev;
Lee Schermerhorn39da08c2009-12-14 17:58:36 -080028
29#if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HUGETLBFS)
30 struct work_struct node_work;
31#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070032};
33
Gary Hadec04fc582009-01-06 14:39:14 -080034struct memory_block;
Yasunori Goto0fc44152006-06-27 02:53:38 -070035extern struct node node_devices[];
Lee Schermerhorn9a305232009-12-14 17:58:25 -080036typedef void (*node_registration_func_t)(struct node *);
Yasunori Goto0fc44152006-06-27 02:53:38 -070037
Linus Torvalds1da177e2005-04-16 15:20:36 -070038extern int register_node(struct node *, int, struct node *);
Keiichiro Tokunaga4b450992005-05-08 21:28:53 +090039extern void unregister_node(struct node *node);
KAMEZAWA Hiroyuki36920e02006-08-27 01:23:52 -070040#ifdef CONFIG_NUMA
Yasunori Goto0fc44152006-06-27 02:53:38 -070041extern int register_one_node(int nid);
42extern void unregister_one_node(int nid);
KAMEZAWA Hiroyuki76b67ed2006-06-27 02:53:41 -070043extern int register_cpu_under_node(unsigned int cpu, unsigned int nid);
44extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid);
Gary Hadec04fc582009-01-06 14:39:14 -080045extern int register_mem_sect_under_node(struct memory_block *mem_blk,
46 int nid);
47extern int unregister_mem_sect_under_nodes(struct memory_block *mem_blk);
Lee Schermerhorn9a305232009-12-14 17:58:25 -080048
49#ifdef CONFIG_HUGETLBFS
50extern void register_hugetlbfs_with_node(node_registration_func_t doregister,
51 node_registration_func_t unregister);
52#endif
KAMEZAWA Hiroyuki76b67ed2006-06-27 02:53:41 -070053#else
KAMEZAWA Hiroyuki36920e02006-08-27 01:23:52 -070054static inline int register_one_node(int nid)
55{
56 return 0;
57}
58static inline int unregister_one_node(int nid)
59{
60 return 0;
61}
KAMEZAWA Hiroyuki76b67ed2006-06-27 02:53:41 -070062static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid)
63{
64 return 0;
65}
66static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
67{
68 return 0;
69}
Gary Hadec04fc582009-01-06 14:39:14 -080070static inline int register_mem_sect_under_node(struct memory_block *mem_blk,
71 int nid)
72{
73 return 0;
74}
75static inline int unregister_mem_sect_under_nodes(struct memory_block *mem_blk)
76{
77 return 0;
78}
Lee Schermerhorn9a305232009-12-14 17:58:25 -080079
80static inline void register_hugetlbfs_with_node(node_registration_func_t reg,
81 node_registration_func_t unreg)
82{
83}
KAMEZAWA Hiroyuki76b67ed2006-06-27 02:53:41 -070084#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
86#define to_node(sys_device) container_of(sys_device, struct node, sysdev)
87
88#endif /* _LINUX_NODE_H_ */