[linux.git] / include / linux / vmalloc.h

#ifndef _LINUX_VMALLOC_H
#define _LINUX_VMALLOC_H

#include <linux/spinlock.h>
#include <asm/page.h>		/* pgprot_t */

struct vm_area_struct;

/* bits in vm_struct->flags */
#define VM_IOREMAP	0x00000001	/* ioremap() and friends */
#define VM_ALLOC	0x00000002	/* vmalloc() */
#define VM_MAP		0x00000004	/* vmap()ed pages */
#define VM_USERMAP	0x00000008	/* suitable for remap_vmalloc_range */
#define VM_VPAGES	0x00000010	/* buffer for pages was vmalloc'ed */
/* bits [20..32] reserved for arch specific ioremap internals */

/*
 * Maximum alignment for ioremap() regions.
 * Can be overriden by arch-specific value.
 */
#ifndef IOREMAP_MAX_ORDER
#define IOREMAP_MAX_ORDER	(7 + PAGE_SHIFT)	/* 128 pages */
#endif

struct vm_struct {
	/* keep next,addr,size together to speedup lookups */
	struct vm_struct	*next;
	void			*addr;
	unsigned long		size;
	unsigned long		flags;
	struct page		**pages;
	unsigned int		nr_pages;
	unsigned long		phys_addr;
};

/*
 *	Highlevel APIs for driver use
 */
extern void *vmalloc(unsigned long size);
extern void *vmalloc_user(unsigned long size);
extern void *vmalloc_node(unsigned long size, int node);
extern void *vmalloc_exec(unsigned long size);
extern void *vmalloc_32(unsigned long size);
extern void *vmalloc_32_user(unsigned long size);
extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask,
				pgprot_t prot);
extern void vfree(const void *addr);

extern void *vmap(struct page **pages, unsigned int count,
			unsigned long flags, pgprot_t prot);
extern void vunmap(const void *addr);

extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
							unsigned long pgoff);
void vmalloc_sync_all(void);
 
/*
 *	Lowlevel-APIs (not for driver use!)
 */

static inline size_t get_vm_area_size(const struct vm_struct *area)
{
	/* return actual size without guard page */
	return area->size - PAGE_SIZE;
}

extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
					unsigned long start, unsigned long end);
extern struct vm_struct *get_vm_area_node(unsigned long size,
					  unsigned long flags, int node,
					  gfp_t gfp_mask);
extern struct vm_struct *remove_vm_area(const void *addr);

extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
			struct page ***pages);
extern void unmap_kernel_range(unsigned long addr, unsigned long size);

/* Allocate/destroy a 'vmalloc' VM area. */
extern struct vm_struct *alloc_vm_area(size_t size);
extern void free_vm_area(struct vm_struct *area);

/*
 *	Internals.  Dont't use..
 */
extern rwlock_t vmlist_lock;
extern struct vm_struct *vmlist;

#endif /* _LINUX_VMALLOC_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_VMALLOC_H
	2	#define _LINUX_VMALLOC_H
	3
	4	#include <linux/spinlock.h>
	5	#include <asm/page.h> /* pgprot_t */
	6
83342314 NP	7	struct vm_area_struct;
83342314 NP	8
1da177e4 LT	9	/* bits in vm_struct->flags */
	10	#define VM_IOREMAP 0x00000001 /* ioremap() and friends */
	11	#define VM_ALLOC 0x00000002 /* vmalloc() */
	12	#define VM_MAP 0x00000004 /* vmap()ed pages */
83342314	13	#define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */
8757d5fa	14	#define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */
1da177e4 LT	15	/* bits [20..32] reserved for arch specific ioremap internals */
1da177e4 LT	16
fd195c49 DS	17	/*
	18	* Maximum alignment for ioremap() regions.
	19	* Can be overriden by arch-specific value.
	20	*/
	21	#ifndef IOREMAP_MAX_ORDER
	22	#define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
	23	#endif
	24
1da177e4	25	struct vm_struct {
2b4ac44e ED	26	/* keep next,addr,size together to speedup lookups */
2b4ac44e ED	27	struct vm_struct *next;
1da177e4 LT	28	void *addr;
	29	unsigned long size;
	30	unsigned long flags;
	31	struct page **pages;
	32	unsigned int nr_pages;
	33	unsigned long phys_addr;
1da177e4 LT	34	};
	35
	36	/*
	37	* Highlevel APIs for driver use
	38	*/
	39	extern void *vmalloc(unsigned long size);
83342314	40	extern void *vmalloc_user(unsigned long size);
930fc45a	41	extern void *vmalloc_node(unsigned long size, int node);
1da177e4 LT	42	extern void *vmalloc_exec(unsigned long size);
1da177e4 LT	43	extern void *vmalloc_32(unsigned long size);
83342314	44	extern void *vmalloc_32_user(unsigned long size);
dd0fc66f	45	extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
930fc45a CL	46	extern void __vmalloc_area(struct vm_struct area, gfp_t gfp_mask,
930fc45a CL	47	pgprot_t prot);
b3bdda02	48	extern void vfree(const void *addr);
1da177e4 LT	49
	50	extern void vmap(struct page *pages, unsigned int count,
	51	unsigned long flags, pgprot_t prot);
b3bdda02	52	extern void vunmap(const void *addr);
83342314 NP	53
	54	extern int remap_vmalloc_range(struct vm_area_struct vma, void addr,
	55	unsigned long pgoff);
1eeb66a1	56	void vmalloc_sync_all(void);
1da177e4 LT	57
	58	/*
	59	* Lowlevel-APIs (not for driver use!)
	60	*/
9585116b JF	61
	62	static inline size_t get_vm_area_size(const struct vm_struct *area)
	63	{
	64	/* return actual size without guard page */
	65	return area->size - PAGE_SIZE;
	66	}
	67
1da177e4 LT	68	extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
	69	extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
	70	unsigned long start, unsigned long end);
930fc45a	71	extern struct vm_struct *get_vm_area_node(unsigned long size,
52fd24ca GP	72	unsigned long flags, int node,
52fd24ca GP	73	gfp_t gfp_mask);
b3bdda02	74	extern struct vm_struct remove_vm_area(const void addr);
c19c03fc	75
1da177e4 LT	76	extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
1da177e4 LT	77	struct page ***pages);
c19c03fc	78	extern void unmap_kernel_range(unsigned long addr, unsigned long size);
1da177e4	79
5f4352fb JF	80	/* Allocate/destroy a 'vmalloc' VM area. */
	81	extern struct vm_struct *alloc_vm_area(size_t size);
	82	extern void free_vm_area(struct vm_struct *area);
	83
1da177e4 LT	84	/*
	85	* Internals. Dont't use..
	86	*/
	87	extern rwlock_t vmlist_lock;
	88	extern struct vm_struct *vmlist;
	89
	90	#endif /* _LINUX_VMALLOC_H */