Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * memory buffer pool support | |
3 | */ | |
4 | #ifndef _LINUX_MEMPOOL_H | |
5 | #define _LINUX_MEMPOOL_H | |
6 | ||
7 | #include <linux/wait.h> | |
8 | ||
fec433aa MD |
9 | struct kmem_cache; |
10 | ||
dd0fc66f | 11 | typedef void * (mempool_alloc_t)(gfp_t gfp_mask, void *pool_data); |
1da177e4 LT |
12 | typedef void (mempool_free_t)(void *element, void *pool_data); |
13 | ||
14 | typedef struct mempool_s { | |
15 | spinlock_t lock; | |
16 | int min_nr; /* nr of elements at *elements */ | |
17 | int curr_nr; /* Current nr of elements at *elements */ | |
18 | void **elements; | |
19 | ||
20 | void *pool_data; | |
21 | mempool_alloc_t *alloc; | |
22 | mempool_free_t *free; | |
23 | wait_queue_head_t wait; | |
24 | } mempool_t; | |
1946089a CL |
25 | |
26 | extern mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn, | |
27 | mempool_free_t *free_fn, void *pool_data); | |
28 | extern mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn, | |
29 | mempool_free_t *free_fn, void *pool_data, int nid); | |
30 | ||
dd0fc66f | 31 | extern int mempool_resize(mempool_t *pool, int new_min_nr, gfp_t gfp_mask); |
1da177e4 | 32 | extern void mempool_destroy(mempool_t *pool); |
dd0fc66f | 33 | extern void * mempool_alloc(mempool_t *pool, gfp_t gfp_mask); |
1da177e4 LT |
34 | extern void mempool_free(void *element, mempool_t *pool); |
35 | ||
36 | /* | |
37 | * A mempool_alloc_t and mempool_free_t that get the memory from | |
38 | * a slab that is passed in through pool_data. | |
39 | */ | |
dd0fc66f | 40 | void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data); |
1da177e4 | 41 | void mempool_free_slab(void *element, void *pool_data); |
fec433aa MD |
42 | static inline mempool_t * |
43 | mempool_create_slab_pool(int min_nr, struct kmem_cache *kc) | |
44 | { | |
45 | return mempool_create(min_nr, mempool_alloc_slab, mempool_free_slab, | |
46 | (void *) kc); | |
47 | } | |
1da177e4 | 48 | |
53184082 | 49 | /* |
f183323d MD |
50 | * 2 mempool_alloc_t's and a mempool_free_t to kmalloc/kzalloc and kfree |
51 | * the amount of memory specified by pool_data | |
53184082 MD |
52 | */ |
53 | void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data); | |
f183323d | 54 | void *mempool_kzalloc(gfp_t gfp_mask, void *pool_data); |
53184082 MD |
55 | void mempool_kfree(void *element, void *pool_data); |
56 | static inline mempool_t *mempool_create_kmalloc_pool(int min_nr, size_t size) | |
57 | { | |
58 | return mempool_create(min_nr, mempool_kmalloc, mempool_kfree, | |
59 | (void *) size); | |
60 | } | |
f183323d MD |
61 | static inline mempool_t *mempool_create_kzalloc_pool(int min_nr, size_t size) |
62 | { | |
63 | return mempool_create(min_nr, mempool_kzalloc, mempool_kfree, | |
64 | (void *) size); | |
65 | } | |
53184082 | 66 | |
6e0678f3 MD |
67 | /* |
68 | * A mempool_alloc_t and mempool_free_t for a simple page allocator that | |
69 | * allocates pages of the order specified by pool_data | |
70 | */ | |
71 | void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data); | |
72 | void mempool_free_pages(void *element, void *pool_data); | |
73 | static inline mempool_t *mempool_create_page_pool(int min_nr, int order) | |
74 | { | |
75 | return mempool_create(min_nr, mempool_alloc_pages, mempool_free_pages, | |
76 | (void *)(long)order); | |
77 | } | |
78 | ||
1da177e4 | 79 | #endif /* _LINUX_MEMPOOL_H */ |