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#define CMA_MAX_NAME 64
 8
 9struct cma {
10	unsigned long   base_pfn;
11	unsigned long   count;
12	unsigned long   *bitmap;
13	unsigned int order_per_bit; /* Order of pages represented by one bit */
14	struct mutex    lock;
15#ifdef CONFIG_CMA_DEBUGFS
16	struct hlist_head mem_head;
17	spinlock_t mem_head_lock;
18	struct debugfs_u32_array dfs_bitmap;
19#endif
20	char name[CMA_MAX_NAME];
21};
22
23extern struct cma cma_areas[MAX_CMA_AREAS];
24extern unsigned cma_area_count;
25
26static inline unsigned long cma_bitmap_maxno(struct cma *cma)
27{
28	return cma->count >> cma->order_per_bit;
29}
30
31#endif