[linux-block.git] / mm / cma.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __MM_CMA_H__
#define __MM_CMA_H__

#include <linux/debugfs.h>

#define CMA_MAX_NAME 64

struct cma {
	unsigned long   base_pfn;
	unsigned long   count;
	unsigned long   *bitmap;
	unsigned int order_per_bit; /* Order of pages represented by one bit */
	struct mutex    lock;
#ifdef CONFIG_CMA_DEBUGFS
	struct hlist_head mem_head;
	spinlock_t mem_head_lock;
	struct debugfs_u32_array dfs_bitmap;
#endif
	char name[CMA_MAX_NAME];
};

extern struct cma cma_areas[MAX_CMA_AREAS];
extern unsigned cma_area_count;

static inline unsigned long cma_bitmap_maxno(struct cma *cma)
{
	return cma->count >> cma->order_per_bit;
}

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
28b24c1f SL	2	#ifndef __MM_CMA_H__
	3	#define __MM_CMA_H__
	4
a2b992c8 JK	5	#include <linux/debugfs.h>
a2b992c8 JK	6
18e98e56 BS	7	#define CMA_MAX_NAME 64
18e98e56 BS	8
28b24c1f SL	9	struct 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;
26b02a1f SL	15	#ifdef CONFIG_CMA_DEBUGFS
	16	struct hlist_head mem_head;
	17	spinlock_t mem_head_lock;
a2b992c8	18	struct debugfs_u32_array dfs_bitmap;
26b02a1f	19	#endif
18e98e56	20	char name[CMA_MAX_NAME];
28b24c1f SL	21	};
	22
	23	extern struct cma cma_areas[MAX_CMA_AREAS];
	24	extern unsigned cma_area_count;
	25
f21838e0	26	static inline unsigned long cma_bitmap_maxno(struct cma *cma)
28b24c1f SL	27	{
	28	return cma->count >> cma->order_per_bit;
	29	}
	30
	31	#endif