Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _LINUX_VMALLOC_H |
2 | #define _LINUX_VMALLOC_H | |
3 | ||
4 | #include <linux/spinlock.h> | |
db64fe02 | 5 | #include <linux/init.h> |
13ba3fcb | 6 | #include <linux/list.h> |
1da177e4 | 7 | #include <asm/page.h> /* pgprot_t */ |
13ba3fcb | 8 | #include <linux/rbtree.h> |
1da177e4 | 9 | |
605d9288 | 10 | struct vm_area_struct; /* vma defining user mapping in mm_types.h */ |
83342314 | 11 | |
605d9288 | 12 | /* bits in flags of vmalloc's vm_struct below */ |
1da177e4 LT |
13 | #define VM_IOREMAP 0x00000001 /* ioremap() and friends */ |
14 | #define VM_ALLOC 0x00000002 /* vmalloc() */ | |
15 | #define VM_MAP 0x00000004 /* vmap()ed pages */ | |
83342314 | 16 | #define VM_USERMAP 0x00000008 /* suitable for remap_vmalloc_range */ |
8757d5fa | 17 | #define VM_VPAGES 0x00000010 /* buffer for pages was vmalloc'ed */ |
f5252e00 | 18 | #define VM_UNLIST 0x00000020 /* vm_struct is not listed in vmlist */ |
1da177e4 LT |
19 | /* bits [20..32] reserved for arch specific ioremap internals */ |
20 | ||
fd195c49 DS |
21 | /* |
22 | * Maximum alignment for ioremap() regions. | |
23 | * Can be overriden by arch-specific value. | |
24 | */ | |
25 | #ifndef IOREMAP_MAX_ORDER | |
26 | #define IOREMAP_MAX_ORDER (7 + PAGE_SHIFT) /* 128 pages */ | |
27 | #endif | |
28 | ||
1da177e4 | 29 | struct vm_struct { |
2b4ac44e | 30 | struct vm_struct *next; |
1da177e4 LT |
31 | void *addr; |
32 | unsigned long size; | |
33 | unsigned long flags; | |
34 | struct page **pages; | |
35 | unsigned int nr_pages; | |
ffa71f33 | 36 | phys_addr_t phys_addr; |
5e6cafc8 | 37 | const void *caller; |
1da177e4 LT |
38 | }; |
39 | ||
13ba3fcb AK |
40 | struct vmap_area { |
41 | unsigned long va_start; | |
42 | unsigned long va_end; | |
43 | unsigned long flags; | |
44 | struct rb_node rb_node; /* address sorted rbtree */ | |
45 | struct list_head list; /* address sorted list */ | |
46 | struct list_head purge_list; /* "lazy purge" list */ | |
47 | struct vm_struct *vm; | |
48 | struct rcu_head rcu_head; | |
49 | }; | |
50 | ||
1da177e4 LT |
51 | /* |
52 | * Highlevel APIs for driver use | |
53 | */ | |
db64fe02 NP |
54 | extern void vm_unmap_ram(const void *mem, unsigned int count); |
55 | extern void *vm_map_ram(struct page **pages, unsigned int count, | |
56 | int node, pgprot_t prot); | |
57 | extern void vm_unmap_aliases(void); | |
58 | ||
59 | #ifdef CONFIG_MMU | |
60 | extern void __init vmalloc_init(void); | |
61 | #else | |
62 | static inline void vmalloc_init(void) | |
63 | { | |
64 | } | |
65 | #endif | |
66 | ||
1da177e4 | 67 | extern void *vmalloc(unsigned long size); |
e1ca7788 | 68 | extern void *vzalloc(unsigned long size); |
83342314 | 69 | extern void *vmalloc_user(unsigned long size); |
930fc45a | 70 | extern void *vmalloc_node(unsigned long size, int node); |
e1ca7788 | 71 | extern void *vzalloc_node(unsigned long size, int node); |
1da177e4 LT |
72 | extern void *vmalloc_exec(unsigned long size); |
73 | extern void *vmalloc_32(unsigned long size); | |
83342314 | 74 | extern void *vmalloc_32_user(unsigned long size); |
dd0fc66f | 75 | extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot); |
d0a21265 DR |
76 | extern void *__vmalloc_node_range(unsigned long size, unsigned long align, |
77 | unsigned long start, unsigned long end, gfp_t gfp_mask, | |
5e6cafc8 | 78 | pgprot_t prot, int node, const void *caller); |
b3bdda02 | 79 | extern void vfree(const void *addr); |
1da177e4 LT |
80 | |
81 | extern void *vmap(struct page **pages, unsigned int count, | |
82 | unsigned long flags, pgprot_t prot); | |
b3bdda02 | 83 | extern void vunmap(const void *addr); |
83342314 NP |
84 | |
85 | extern int remap_vmalloc_range(struct vm_area_struct *vma, void *addr, | |
86 | unsigned long pgoff); | |
1eeb66a1 | 87 | void vmalloc_sync_all(void); |
1da177e4 LT |
88 | |
89 | /* | |
90 | * Lowlevel-APIs (not for driver use!) | |
91 | */ | |
9585116b JF |
92 | |
93 | static inline size_t get_vm_area_size(const struct vm_struct *area) | |
94 | { | |
95 | /* return actual size without guard page */ | |
96 | return area->size - PAGE_SIZE; | |
97 | } | |
98 | ||
1da177e4 | 99 | extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags); |
23016969 | 100 | extern struct vm_struct *get_vm_area_caller(unsigned long size, |
5e6cafc8 | 101 | unsigned long flags, const void *caller); |
1da177e4 LT |
102 | extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags, |
103 | unsigned long start, unsigned long end); | |
c2968612 BH |
104 | extern struct vm_struct *__get_vm_area_caller(unsigned long size, |
105 | unsigned long flags, | |
106 | unsigned long start, unsigned long end, | |
5e6cafc8 | 107 | const void *caller); |
b3bdda02 | 108 | extern struct vm_struct *remove_vm_area(const void *addr); |
e9da6e99 | 109 | extern struct vm_struct *find_vm_area(const void *addr); |
c19c03fc | 110 | |
1da177e4 LT |
111 | extern int map_vm_area(struct vm_struct *area, pgprot_t prot, |
112 | struct page ***pages); | |
b554cb42 | 113 | #ifdef CONFIG_MMU |
8fc48985 TH |
114 | extern int map_kernel_range_noflush(unsigned long start, unsigned long size, |
115 | pgprot_t prot, struct page **pages); | |
116 | extern void unmap_kernel_range_noflush(unsigned long addr, unsigned long size); | |
c19c03fc | 117 | extern void unmap_kernel_range(unsigned long addr, unsigned long size); |
b554cb42 GY |
118 | #else |
119 | static inline int | |
120 | map_kernel_range_noflush(unsigned long start, unsigned long size, | |
121 | pgprot_t prot, struct page **pages) | |
122 | { | |
123 | return size >> PAGE_SHIFT; | |
124 | } | |
125 | static inline void | |
126 | unmap_kernel_range_noflush(unsigned long addr, unsigned long size) | |
127 | { | |
128 | } | |
129 | static inline void | |
130 | unmap_kernel_range(unsigned long addr, unsigned long size) | |
131 | { | |
132 | } | |
133 | #endif | |
1da177e4 | 134 | |
5f4352fb | 135 | /* Allocate/destroy a 'vmalloc' VM area. */ |
cd12909c | 136 | extern struct vm_struct *alloc_vm_area(size_t size, pte_t **ptes); |
5f4352fb JF |
137 | extern void free_vm_area(struct vm_struct *area); |
138 | ||
69beeb1d KM |
139 | /* for /dev/kmem */ |
140 | extern long vread(char *buf, char *addr, unsigned long count); | |
141 | extern long vwrite(char *buf, char *addr, unsigned long count); | |
142 | ||
1da177e4 LT |
143 | /* |
144 | * Internals. Dont't use.. | |
145 | */ | |
f1c4069e | 146 | extern struct list_head vmap_area_list; |
be9b7335 | 147 | extern __init void vm_area_add_early(struct vm_struct *vm); |
c0c0a293 | 148 | extern __init void vm_area_register_early(struct vm_struct *vm, size_t align); |
1da177e4 | 149 | |
4f8b02b4 | 150 | #ifdef CONFIG_SMP |
b554cb42 | 151 | # ifdef CONFIG_MMU |
ca23e405 TH |
152 | struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets, |
153 | const size_t *sizes, int nr_vms, | |
ec3f64fc | 154 | size_t align); |
ca23e405 TH |
155 | |
156 | void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms); | |
b554cb42 GY |
157 | # else |
158 | static inline struct vm_struct ** | |
159 | pcpu_get_vm_areas(const unsigned long *offsets, | |
160 | const size_t *sizes, int nr_vms, | |
161 | size_t align) | |
162 | { | |
163 | return NULL; | |
164 | } | |
165 | ||
166 | static inline void | |
167 | pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms) | |
168 | { | |
169 | } | |
170 | # endif | |
4f8b02b4 | 171 | #endif |
ca23e405 | 172 | |
db3808c1 JK |
173 | struct vmalloc_info { |
174 | unsigned long used; | |
175 | unsigned long largest_chunk; | |
176 | }; | |
177 | ||
178 | #ifdef CONFIG_MMU | |
179 | #define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START) | |
180 | extern void get_vmalloc_info(struct vmalloc_info *vmi); | |
181 | #else | |
182 | ||
183 | #define VMALLOC_TOTAL 0UL | |
184 | #define get_vmalloc_info(vmi) \ | |
185 | do { \ | |
186 | (vmi)->used = 0; \ | |
187 | (vmi)->largest_chunk = 0; \ | |
188 | } while (0) | |
189 | #endif | |
190 | ||
1da177e4 | 191 | #endif /* _LINUX_VMALLOC_H */ |