1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __MM_CMA_H__
3#define __MM_CMA_H__
4
5struct 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
18extern struct cma cma_areas[MAX_CMA_AREAS];
19extern unsigned cma_area_count;
20
21static inline unsigned long cma_bitmap_maxno(struct cma *cma)
22{
23 return cma->count >> cma->order_per_bit;
24}
25
26#endif
27