[net-next-2.6.git] / include / linux / memory.h

/*
 * include/linux/memory.h - generic memory definition
 *
 * This is mainly for topological representation. We define the
 * basic "struct memory_block" here, which can be embedded in per-arch
 * definitions or NUMA information.
 *
 * Basic handling of the devices is done in drivers/base/memory.c
 * and system devices are handled in drivers/base/sys.c.
 *
 * Memory block are exported via sysfs in the class/memory/devices/
 * directory.
 *
 */
#ifndef _LINUX_MEMORY_H_
#define _LINUX_MEMORY_H_

#include <linux/sysdev.h>
#include <linux/node.h>
#include <linux/compiler.h>
#include <linux/mutex.h>

struct memory_block {
	unsigned long phys_index;
	unsigned long state;
	/*
	 * This serializes all state change requests.  It isn't
	 * held during creation because the control files are
	 * created long after the critical areas during
	 * initialization.
	 */
	struct mutex state_mutex;
	int phys_device;		/* to which fru does this belong? */
	void *hw;			/* optional pointer to fw/hw data */
	int (*phys_callback)(struct memory_block *);
	struct sys_device sysdev;
};

/* These states are exposed to userspace as text strings in sysfs */
#define	MEM_ONLINE		(1<<0) /* exposed to userspace */
#define	MEM_GOING_OFFLINE	(1<<1) /* exposed to userspace */
#define	MEM_OFFLINE		(1<<2) /* exposed to userspace */
#define	MEM_GOING_ONLINE	(1<<3)
#define	MEM_CANCEL_ONLINE	(1<<4)
#define	MEM_CANCEL_OFFLINE	(1<<5)

struct memory_notify {
	unsigned long start_pfn;
	unsigned long nr_pages;
	int status_change_nid;
};

struct notifier_block;
struct mem_section;

#ifndef CONFIG_MEMORY_HOTPLUG_SPARSE
static inline int memory_dev_init(void)
{
	return 0;
}
static inline int register_memory_notifier(struct notifier_block *nb)
{
	return 0;
}
static inline void unregister_memory_notifier(struct notifier_block *nb)
{
}
static inline int memory_notify(unsigned long val, void *v)
{
	return 0;
}
#else
extern int register_memory_notifier(struct notifier_block *nb);
extern void unregister_memory_notifier(struct notifier_block *nb);
extern int register_new_memory(struct mem_section *);
extern int unregister_memory_section(struct mem_section *);
extern int memory_dev_init(void);
extern int remove_memory_block(unsigned long, struct mem_section *, int);
extern int memory_notify(unsigned long val, void *v);
#define CONFIG_MEM_BLOCK_SIZE	(PAGES_PER_SECTION<<PAGE_SHIFT)


#endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */

#ifdef CONFIG_MEMORY_HOTPLUG
#define hotplug_memory_notifier(fn, pri) {			\
	static struct notifier_block fn##_mem_nb =		\
		{ .notifier_call = fn, .priority = pri };	\
	register_memory_notifier(&fn##_mem_nb);			\
}
#else
#define hotplug_memory_notifier(fn, pri) do { } while (0)
#endif

#endif /* _LINUX_MEMORY_H_ */
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
53947027	56	#ifndef CONFIG_MEMORY_HOTPLUG_SPARSE
3947be19 DH	57	static inline int memory_dev_init(void)
	58	{
	59	return 0;
	60	}
	61	static inline int register_memory_notifier(struct notifier_block *nb)
	62	{
	63	return 0;
	64	}
	65	static inline void unregister_memory_notifier(struct notifier_block *nb)
	66	{
	67	}
7b78d335 YG	68	static inline int memory_notify(unsigned long val, void *v)
	69	{
	70	return 0;
	71	}
3947be19	72	#else
7b78d335 YG	73	extern int register_memory_notifier(struct notifier_block *nb);
7b78d335 YG	74	extern void unregister_memory_notifier(struct notifier_block *nb);
3947be19 DH	75	extern int register_new_memory(struct mem_section *);
	76	extern int unregister_memory_section(struct mem_section *);
	77	extern int memory_dev_init(void);
b792de39	78	extern int remove_memory_block(unsigned long, struct mem_section *, int);
7b78d335	79	extern int memory_notify(unsigned long val, void *v);
3947be19 DH	80	#define CONFIG_MEM_BLOCK_SIZE (PAGES_PER_SECTION<<PAGE_SHIFT)
3947be19 DH	81
3947be19	82
53947027	83	#endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */
3947be19	84
b9049e23	85	#ifdef CONFIG_MEMORY_HOTPLUG
3947be19 DH	86	#define hotplug_memory_notifier(fn, pri) { \
	87	static struct notifier_block fn##_mem_nb = \
	88	{ .notifier_call = fn, .priority = pri }; \
	89	register_memory_notifier(&fn##_mem_nb); \
	90	}
b9049e23 YG	91	#else
	92	#define hotplug_memory_notifier(fn, pri) do { } while (0)
	93	#endif
3947be19 DH	94
3947be19 DH	95	#endif /* _LINUX_MEMORY_H_ */