Commit | Line | Data |
---|---|---|
61989a80 NG |
1 | /* |
2 | * zsmalloc memory allocator | |
3 | * | |
4 | * Copyright (C) 2011 Nitin Gupta | |
31fc00bb | 5 | * Copyright (C) 2012, 2013 Minchan Kim |
61989a80 NG |
6 | * |
7 | * This code is released using a dual license strategy: BSD/GPL | |
8 | * You can choose the license that better fits your requirements. | |
9 | * | |
10 | * Released under the terms of 3-clause BSD License | |
11 | * Released under the terms of GNU General Public License Version 2.0 | |
12 | */ | |
13 | ||
14 | #ifndef _ZS_MALLOC_H_ | |
15 | #define _ZS_MALLOC_H_ | |
16 | ||
17 | #include <linux/types.h> | |
18 | ||
b7418510 SJ |
19 | /* |
20 | * zsmalloc mapping modes | |
21 | * | |
c3e3e88a | 22 | * NOTE: These only make a difference when a mapped object spans pages. |
396b7fd6 | 23 | */ |
b7418510 SJ |
24 | enum zs_mapmode { |
25 | ZS_MM_RW, /* normal read-write mapping */ | |
26 | ZS_MM_RO, /* read-only (no copy-out at unmap time) */ | |
27 | ZS_MM_WO /* write-only (no copy-in at map time) */ | |
c3e3e88a NC |
28 | /* |
29 | * NOTE: ZS_MM_WO should only be used for initializing new | |
30 | * (uninitialized) allocations. Partial writes to already | |
31 | * initialized allocations should use ZS_MM_RW to preserve the | |
32 | * existing data. | |
33 | */ | |
b7418510 SJ |
34 | }; |
35 | ||
7d3f3938 | 36 | struct zs_pool_stats { |
860c707d | 37 | /* How many pages were migrated (freed) */ |
23959281 | 38 | atomic_long_t pages_compacted; |
7d3f3938 SS |
39 | }; |
40 | ||
61989a80 NG |
41 | struct zs_pool; |
42 | ||
d0d8da2d | 43 | struct zs_pool *zs_create_pool(const char *name); |
61989a80 NG |
44 | void zs_destroy_pool(struct zs_pool *pool); |
45 | ||
d0d8da2d | 46 | unsigned long zs_malloc(struct zs_pool *pool, size_t size, gfp_t flags); |
c2344348 | 47 | void zs_free(struct zs_pool *pool, unsigned long obj); |
61989a80 | 48 | |
010b495e SS |
49 | size_t zs_huge_class_size(struct zs_pool *pool); |
50 | ||
b7418510 SJ |
51 | void *zs_map_object(struct zs_pool *pool, unsigned long handle, |
52 | enum zs_mapmode mm); | |
c2344348 | 53 | void zs_unmap_object(struct zs_pool *pool, unsigned long handle); |
61989a80 | 54 | |
722cdc17 | 55 | unsigned long zs_get_total_pages(struct zs_pool *pool); |
312fcae2 | 56 | unsigned long zs_compact(struct zs_pool *pool); |
61989a80 | 57 | |
7c2af309 AR |
58 | unsigned int zs_lookup_class_index(struct zs_pool *pool, unsigned int size); |
59 | ||
7d3f3938 | 60 | void zs_pool_stats(struct zs_pool *pool, struct zs_pool_stats *stats); |
61989a80 | 61 | #endif |