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

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

#include <linux/debugfs.h>
#include <linux/kobject.h>

struct cma_kobject {
	struct kobject kobj;
	struct cma *cma;
};

struct cma {
	unsigned long   base_pfn;
	unsigned long   count;
	unsigned long   *bitmap;
	unsigned int order_per_bit; /* Order of pages represented by one bit */
	spinlock_t	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];
#ifdef CONFIG_CMA_SYSFS
	/* the number of CMA page successful allocations */
	atomic64_t nr_pages_succeeded;
	/* the number of CMA page allocation failures */
	atomic64_t nr_pages_failed;
	/* kobject requires dynamic object */
	struct cma_kobject *cma_kobj;
#endif
};

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;
}

#ifdef CONFIG_CMA_SYSFS
void cma_sysfs_account_success_pages(struct cma *cma, unsigned long nr_pages);
void cma_sysfs_account_fail_pages(struct cma *cma, unsigned long nr_pages);
#else
static inline void cma_sysfs_account_success_pages(struct cma *cma,
						   unsigned long nr_pages) {};
static inline void cma_sysfs_account_fail_pages(struct cma *cma,
						unsigned long nr_pages) {};
#endif
#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	5	#include <linux/debugfs.h>
43ca106f MK	6	#include <linux/kobject.h>
	7
	8	struct cma_kobject {
	9	struct kobject kobj;
	10	struct cma *cma;
	11	};
a2b992c8	12
28b24c1f SL	13	struct cma {
	14	unsigned long base_pfn;
	15	unsigned long count;
	16	unsigned long *bitmap;
	17	unsigned int order_per_bit; /* Order of pages represented by one bit */
0ef7dcac	18	spinlock_t lock;
26b02a1f SL	19	#ifdef CONFIG_CMA_DEBUGFS
	20	struct hlist_head mem_head;
	21	spinlock_t mem_head_lock;
a2b992c8	22	struct debugfs_u32_array dfs_bitmap;
26b02a1f	23	#endif
18e98e56	24	char name[CMA_MAX_NAME];
43ca106f MK	25	#ifdef CONFIG_CMA_SYSFS
	26	/* the number of CMA page successful allocations */
	27	atomic64_t nr_pages_succeeded;
	28	/* the number of CMA page allocation failures */
	29	atomic64_t nr_pages_failed;
	30	/* kobject requires dynamic object */
	31	struct cma_kobject *cma_kobj;
	32	#endif
28b24c1f SL	33	};
	34
	35	extern struct cma cma_areas[MAX_CMA_AREAS];
	36	extern unsigned cma_area_count;
	37
f21838e0	38	static inline unsigned long cma_bitmap_maxno(struct cma *cma)
28b24c1f SL	39	{
	40	return cma->count >> cma->order_per_bit;
	41	}
	42
43ca106f MK	43	#ifdef CONFIG_CMA_SYSFS
	44	void cma_sysfs_account_success_pages(struct cma *cma, unsigned long nr_pages);
	45	void cma_sysfs_account_fail_pages(struct cma *cma, unsigned long nr_pages);
	46	#else
	47	static inline void cma_sysfs_account_success_pages(struct cma *cma,
	48	unsigned long nr_pages) {};
	49	static inline void cma_sysfs_account_fail_pages(struct cma *cma,
	50	unsigned long nr_pages) {};
	51	#endif
28b24c1f	52	#endif