1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __MM_CMA_H__
3 #define __MM_CMA_H__
4 
5 #include <linux/debugfs.h>
6 
7 struct cma {
8 	unsigned long   base_pfn;
9 	unsigned long   count;
10 	unsigned long   *bitmap;
11 	unsigned int order_per_bit; /* Order of pages represented by one bit */
12 	struct mutex    lock;
13 #ifdef CONFIG_CMA_DEBUGFS
14 	struct hlist_head mem_head;
15 	spinlock_t mem_head_lock;
16 	struct debugfs_u32_array dfs_bitmap;
17 #endif
18 	char name[CMA_MAX_NAME];
19 };
20 
21 extern struct cma cma_areas[MAX_CMA_AREAS];
22 extern unsigned cma_area_count;
23 
cma_bitmap_maxno(struct cma * cma)24 static inline unsigned long cma_bitmap_maxno(struct cma *cma)
25 {
26 	return cma->count >> cma->order_per_bit;
27 }
28 
29 #endif
30