1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef __MM_CMA_H__ |
3 | #define __MM_CMA_H__ |
4 | |
5 | struct cma { |
6 | unsigned long base_pfn; |
7 | unsigned long count; |
8 | unsigned long *bitmap; |
9 | unsigned int order_per_bit; /* Order of pages represented by one bit */ |
10 | struct mutex lock; |
11 | #ifdef CONFIG_CMA_DEBUGFS |
12 | struct hlist_head mem_head; |
13 | spinlock_t mem_head_lock; |
14 | #endif |
15 | const char *name; |
16 | }; |
17 | |
18 | extern struct cma cma_areas[MAX_CMA_AREAS]; |
19 | extern unsigned cma_area_count; |
20 | |
21 | static inline unsigned long cma_bitmap_maxno(struct cma *cma) |
22 | { |
23 | return cma->count >> cma->order_per_bit; |
24 | } |
25 | |
26 | #endif |
27 | |