[linux-2.6-block.git] / include / linux / node.h

/*
 * include/linux/node.h - generic node definition
 *
 * This is mainly for topological representation. We define the 
 * basic 'struct node' here, which can be embedded in per-arch 
 * definitions of processors.
 *
 * Basic handling of the devices is done in drivers/base/node.c
 * and system devices are handled in drivers/base/sys.c. 
 *
 * Nodes are exported via driverfs in the class/node/devices/
 * directory. 
 */
#ifndef _LINUX_NODE_H_
#define _LINUX_NODE_H_

#include <linux/device.h>
#include <linux/cpumask.h>
#include <linux/workqueue.h>

struct node {
	struct device	dev;

#if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HUGETLBFS)
	struct work_struct	node_work;
#endif
};

struct memory_block;
extern struct node *node_devices[];
typedef  void (*node_registration_func_t)(struct node *);

#if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_NUMA)
extern int link_mem_sections(int nid, unsigned long start_pfn, unsigned long nr_pages);
#else
static inline int link_mem_sections(int nid, unsigned long start_pfn, unsigned long nr_pages)
{
	return 0;
}
#endif

extern void unregister_node(struct node *node);
#ifdef CONFIG_NUMA
/* Core of the node registration - only memory hotplug should use this */
extern int __register_one_node(int nid);

/* Registers an online node */
static inline int register_one_node(int nid)
{
	int error = 0;

	if (node_online(nid)) {
		struct pglist_data *pgdat = NODE_DATA(nid);

		error = __register_one_node(nid);
		if (error)
			return error;
		/* link memory sections under this node */
		error = link_mem_sections(nid, pgdat->node_start_pfn, pgdat->node_spanned_pages);
	}

	return error;
}

extern void unregister_one_node(int nid);
extern int register_cpu_under_node(unsigned int cpu, unsigned int nid);
extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid);
extern int register_mem_sect_under_node(struct memory_block *mem_blk,
						int nid);
extern int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
					   unsigned long phys_index);

#ifdef CONFIG_HUGETLBFS
extern void register_hugetlbfs_with_node(node_registration_func_t doregister,
					 node_registration_func_t unregister);
#endif
#else
static inline int __register_one_node(int nid)
{
	return 0;
}
static inline int register_one_node(int nid)
{
	return 0;
}
static inline int unregister_one_node(int nid)
{
	return 0;
}
static inline int register_cpu_under_node(unsigned int cpu, unsigned int nid)
{
	return 0;
}
static inline int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
{
	return 0;
}
static inline int register_mem_sect_under_node(struct memory_block *mem_blk,
							int nid)
{
	return 0;
}
static inline int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
						  unsigned long phys_index)
{
	return 0;
}

static inline void register_hugetlbfs_with_node(node_registration_func_t reg,
						node_registration_func_t unreg)
{
}
#endif

#define to_node(device) container_of(device, struct node, dev)

#endif /* _LINUX_NODE_H_ */
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
1da177e4 LT	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	};
1da177e4 LT	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);
76b67ed9 KH	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,
c04fc586 GH	69	int nid);
d3360164 NF	70	extern int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
d3360164 NF	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,
d3360164 NF	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
1da177e4 LT	117	#endif /* _LINUX_NODE_H_ */