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Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
[mirror_ubuntu-eoan-kernel.git] / include / linux / vmalloc.h
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CommitLineData
1#ifndef _LINUX_VMALLOC_H
2#define _LINUX_VMALLOC_H
3
4#include <linux/spinlock.h>
5#include <linux/init.h>
6#include <asm/page.h> /* pgprot_t */
7
8struct vm_area_struct; /* vma defining user mapping in mm_types.h */
9
10/* bits in flags of vmalloc's vm_struct below */
11#define VM_IOREMAP 0x00000001 /* ioremap() and friends */
12#define VM_ALLOC 0x00000002 /* vmalloc() */
13#define VM_MAP 0x00000004 /* vmap()ed pages */
14#define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */
15#define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */
16#define VM_UNLIST 0x00000020 /* vm_struct is not listed in vmlist */
17/* bits [20..32] reserved for arch specific ioremap internals */
18
19/*
20 * Maximum alignment for ioremap() regions.
21 * Can be overriden by arch-specific value.
22 */
23#ifndef IOREMAP_MAX_ORDER
24#define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */
25#endif
26
27struct vm_struct {
28 struct vm_struct *next;
29 void *addr;
30 unsigned long size;
31 unsigned long flags;
32 struct page **pages;
33 unsigned int nr_pages;
34 phys_addr_t phys_addr;
35 void *caller;
36};
37
38/*
39 * Highlevel APIs for driver use
40 */
41extern void vm_unmap_ram(const void *mem, unsigned int count);
42extern void *vm_map_ram(struct page **pages, unsigned int count,
43 int node, pgprot_t prot);
44extern void vm_unmap_aliases(void);
45
46#ifdef CONFIG_MMU
47extern void __init vmalloc_init(void);
48#else
49static inline void vmalloc_init(void)
50{
51}
52#endif
53
54extern void *vmalloc(unsigned long size);
55extern void *vzalloc(unsigned long size);
56extern void *vmalloc_user(unsigned long size);
57extern void *vmalloc_node(unsigned long size, int node);
58extern void *vzalloc_node(unsigned long size, int node);
59extern void *vmalloc_exec(unsigned long size);
60extern void *vmalloc_32(unsigned long size);
61extern void *vmalloc_32_user(unsigned long size);
62extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
63extern void *__vmalloc_node_range(unsigned long size, unsigned long align,
64 unsigned long start, unsigned long end, gfp_t gfp_mask,
65 pgprot_t prot, int node, void *caller);
66extern void vfree(const void *addr);
67
68extern void *vmap(struct page **pages, unsigned int count,
69 unsigned long flags, pgprot_t prot);
70extern void vunmap(const void *addr);
71
72extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
73 unsigned long pgoff);
74void vmalloc_sync_all(void);
75
76/*
77 * Lowlevel-APIs (not for driver use!)
78 */
79
80static inline size_t get_vm_area_size(const struct vm_struct *area)
81{
82 /* return actual size without guard page */
83 return area->size - PAGE_SIZE;
84}
85
86extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
87extern struct vm_struct *get_vm_area_caller(unsigned long size,
88 unsigned long flags, void *caller);
89extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
90 unsigned long start, unsigned long end);
91extern struct vm_struct *__get_vm_area_caller(unsigned long size,
92 unsigned long flags,
93 unsigned long start, unsigned long end,
94 void *caller);
95extern struct vm_struct *remove_vm_area(const void *addr);
96
97extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
98 struct page ***pages);
99#ifdef CONFIG_MMU
100extern int map_kernel_range_noflush(unsigned long start, unsigned long size,
101 pgprot_t prot, struct page **pages);
102extern void unmap_kernel_range_noflush(unsigned long addr, unsigned long size);
103extern void unmap_kernel_range(unsigned long addr, unsigned long size);
104#else
105static inline int
106map_kernel_range_noflush(unsigned long start, unsigned long size,
107 pgprot_t prot, struct page **pages)
108{
109 return size >> PAGE_SHIFT;
110}
111static inline void
112unmap_kernel_range_noflush(unsigned long addr, unsigned long size)
113{
114}
115static inline void
116unmap_kernel_range(unsigned long addr, unsigned long size)
117{
118}
119#endif
120
121/* Allocate/destroy a 'vmalloc' VM area. */
122extern struct vm_struct *alloc_vm_area(size_t size, pte_t **ptes);
123extern void free_vm_area(struct vm_struct *area);
124
125/* for /dev/kmem */
126extern long vread(char *buf, char *addr, unsigned long count);
127extern long vwrite(char *buf, char *addr, unsigned long count);
128
129/*
130 * Internals. Dont't use..
131 */
132extern rwlock_t vmlist_lock;
133extern struct vm_struct *vmlist;
134extern __init void vm_area_register_early(struct vm_struct *vm, size_t align);
135
136#ifdef CONFIG_SMP
137# ifdef CONFIG_MMU
138struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets,
139 const size_t *sizes, int nr_vms,
140 size_t align);
141
142void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms);
143# else
144static inline struct vm_struct **
145pcpu_get_vm_areas(const unsigned long *offsets,
146 const size_t *sizes, int nr_vms,
147 size_t align)
148{
149 return NULL;
150}
151
152static inline void
153pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
154{
155}
156# endif
157#endif
158
159#endif /* _LINUX_VMALLOC_H */
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