[mirror_ubuntu-hirsute-kernel.git] / mm / cma.h

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

#include <linux/debugfs.h>

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
28b24c1f SL	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;
26b02a1f SL	13	#ifdef CONFIG_CMA_DEBUGFS
	14	struct hlist_head mem_head;
	15	spinlock_t mem_head_lock;
a2b992c8	16	struct debugfs_u32_array dfs_bitmap;
26b02a1f	17	#endif
18e98e56	18	char name[CMA_MAX_NAME];
28b24c1f SL	19	};
	20
	21	extern struct cma cma_areas[MAX_CMA_AREAS];
	22	extern unsigned cma_area_count;
	23
f21838e0	24	static inline unsigned long cma_bitmap_maxno(struct cma *cma)
28b24c1f SL	25	{
	26	return cma->count >> cma->order_per_bit;
	27	}
	28
	29	#endif