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

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_NUMA_H
#define _LINUX_NUMA_H
#include <linux/init.h>
#include <linux/types.h>
#include <linux/nodemask.h>

#define	NUMA_NO_MEMBLK	(-1)

static inline bool numa_valid_node(int nid)
{
	return nid >= 0 && nid < MAX_NUMNODES;
}

/* optionally keep NUMA memory info available post init */
#ifdef CONFIG_NUMA_KEEP_MEMINFO
#define __initdata_or_meminfo
#else
#define __initdata_or_meminfo __initdata
#endif

#ifdef CONFIG_NUMA
#include <asm/sparsemem.h>

extern struct pglist_data *node_data[];
#define NODE_DATA(nid)	(node_data[nid])

void __init alloc_node_data(int nid);
void __init alloc_offline_node_data(int nid);

/* Generic implementation available */
int numa_nearest_node(int node, unsigned int state);

int nearest_node_nodemask(int node, nodemask_t *mask);

#ifndef memory_add_physaddr_to_nid
int memory_add_physaddr_to_nid(u64 start);
#endif

#ifndef phys_to_target_node
int phys_to_target_node(u64 start);
#endif

int numa_fill_memblks(u64 start, u64 end);

#else /* !CONFIG_NUMA */
static inline int numa_nearest_node(int node, unsigned int state)
{
	return NUMA_NO_NODE;
}

static inline int nearest_node_nodemask(int node, nodemask_t *mask)
{
	return NUMA_NO_NODE;
}

static inline int memory_add_physaddr_to_nid(u64 start)
{
	return 0;
}
static inline int phys_to_target_node(u64 start)
{
	return 0;
}

static inline void alloc_offline_node_data(int nid) {}
#endif

#define numa_map_to_online_node(node) numa_nearest_node(node, N_ONLINE)

#ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP
extern const struct attribute_group arch_node_dev_group;
#endif

#endif /* _LINUX_NUMA_H */
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _LINUX_NUMA_H
	3	#define _LINUX_NUMA_H
	4	#include <linux/init.h>
	5	#include <linux/types.h>
	6	#include <linux/nodemask.h>
	7
	8	#define NUMA_NO_MEMBLK (-1)
	9
	10	static inline bool numa_valid_node(int nid)
	11	{
	12	return nid >= 0 && nid < MAX_NUMNODES;
	13	}
	14
	15	/* optionally keep NUMA memory info available post init */
	16	#ifdef CONFIG_NUMA_KEEP_MEMINFO
	17	#define __initdata_or_meminfo
	18	#else
	19	#define __initdata_or_meminfo __initdata
	20	#endif
	21
	22	#ifdef CONFIG_NUMA
	23	#include <asm/sparsemem.h>
	24
	25	extern struct pglist_data *node_data[];
	26	#define NODE_DATA(nid) (node_data[nid])
	27
	28	void __init alloc_node_data(int nid);
	29	void __init alloc_offline_node_data(int nid);
	30
	31	/* Generic implementation available */
	32	int numa_nearest_node(int node, unsigned int state);
	33
	34	int nearest_node_nodemask(int node, nodemask_t *mask);
	35
	36	#ifndef memory_add_physaddr_to_nid
	37	int memory_add_physaddr_to_nid(u64 start);
	38	#endif
	39
	40	#ifndef phys_to_target_node
	41	int phys_to_target_node(u64 start);
	42	#endif
	43
	44	int numa_fill_memblks(u64 start, u64 end);
	45
	46	#else /* !CONFIG_NUMA */
	47	static inline int numa_nearest_node(int node, unsigned int state)
	48	{
	49	return NUMA_NO_NODE;
	50	}
	51
	52	static inline int nearest_node_nodemask(int node, nodemask_t *mask)
	53	{
	54	return NUMA_NO_NODE;
	55	}
	56
	57	static inline int memory_add_physaddr_to_nid(u64 start)
	58	{
	59	return 0;
	60	}
	61	static inline int phys_to_target_node(u64 start)
	62	{
	63	return 0;
	64	}
	65
	66	static inline void alloc_offline_node_data(int nid) {}
	67	#endif
	68
	69	#define numa_map_to_online_node(node) numa_nearest_node(node, N_ONLINE)
	70
	71	#ifdef CONFIG_HAVE_ARCH_NODE_DEV_GROUP
	72	extern const struct attribute_group arch_node_dev_group;
	73	#endif
	74
	75	#endif /* _LINUX_NUMA_H */