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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
28b24c1f SL |
2 | #ifndef __MM_CMA_H__ |
3 | #define __MM_CMA_H__ | |
4 | ||
a2b992c8 | 5 | #include <linux/debugfs.h> |
43ca106f MK |
6 | #include <linux/kobject.h> |
7 | ||
8 | struct cma_kobject { | |
9 | struct kobject kobj; | |
10 | struct cma *cma; | |
11 | }; | |
a2b992c8 | 12 | |
28b24c1f SL |
13 | struct cma { |
14 | unsigned long base_pfn; | |
15 | unsigned long count; | |
16 | unsigned long *bitmap; | |
17 | unsigned int order_per_bit; /* Order of pages represented by one bit */ | |
0ef7dcac | 18 | spinlock_t lock; |
26b02a1f SL |
19 | #ifdef CONFIG_CMA_DEBUGFS |
20 | struct hlist_head mem_head; | |
21 | spinlock_t mem_head_lock; | |
a2b992c8 | 22 | struct debugfs_u32_array dfs_bitmap; |
26b02a1f | 23 | #endif |
18e98e56 | 24 | char name[CMA_MAX_NAME]; |
43ca106f MK |
25 | #ifdef CONFIG_CMA_SYSFS |
26 | /* the number of CMA page successful allocations */ | |
27 | atomic64_t nr_pages_succeeded; | |
28 | /* the number of CMA page allocation failures */ | |
29 | atomic64_t nr_pages_failed; | |
b9ad003a AK |
30 | /* the number of CMA page released */ |
31 | atomic64_t nr_pages_released; | |
43ca106f MK |
32 | /* kobject requires dynamic object */ |
33 | struct cma_kobject *cma_kobj; | |
34 | #endif | |
27d121d0 | 35 | bool reserve_pages_on_error; |
28b24c1f SL |
36 | }; |
37 | ||
38 | extern struct cma cma_areas[MAX_CMA_AREAS]; | |
39 | extern unsigned cma_area_count; | |
40 | ||
f21838e0 | 41 | static inline unsigned long cma_bitmap_maxno(struct cma *cma) |
28b24c1f SL |
42 | { |
43 | return cma->count >> cma->order_per_bit; | |
44 | } | |
45 | ||
43ca106f MK |
46 | #ifdef CONFIG_CMA_SYSFS |
47 | void cma_sysfs_account_success_pages(struct cma *cma, unsigned long nr_pages); | |
48 | void cma_sysfs_account_fail_pages(struct cma *cma, unsigned long nr_pages); | |
b9ad003a | 49 | void cma_sysfs_account_release_pages(struct cma *cma, unsigned long nr_pages); |
43ca106f MK |
50 | #else |
51 | static inline void cma_sysfs_account_success_pages(struct cma *cma, | |
52 | unsigned long nr_pages) {}; | |
53 | static inline void cma_sysfs_account_fail_pages(struct cma *cma, | |
54 | unsigned long nr_pages) {}; | |
b9ad003a AK |
55 | static inline void cma_sysfs_account_release_pages(struct cma *cma, |
56 | unsigned long nr_pages) {}; | |
43ca106f | 57 | #endif |
28b24c1f | 58 | #endif |