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

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __MM_CMA_H__
 3#define __MM_CMA_H__
 4
 5#include <linux/debugfs.h>
 6#include <linux/kobject.h>
 7
 8struct cma_kobject {
 9	struct kobject kobj;
10	struct cma *cma;
11};
12
13struct 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 */
18	spinlock_t	lock;
19#ifdef CONFIG_CMA_DEBUGFS
20	struct hlist_head mem_head;
21	spinlock_t mem_head_lock;
22	struct debugfs_u32_array dfs_bitmap;
23#endif
24	char name[CMA_MAX_NAME];
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
33};
34
35extern struct cma cma_areas[MAX_CMA_AREAS];
36extern unsigned cma_area_count;
37
38static inline unsigned long cma_bitmap_maxno(struct cma *cma)
39{
40	return cma->count >> cma->order_per_bit;
41}
42
43#ifdef CONFIG_CMA_SYSFS
44void cma_sysfs_account_success_pages(struct cma *cma, unsigned long nr_pages);
45void cma_sysfs_account_fail_pages(struct cma *cma, unsigned long nr_pages);
46#else
47static inline void cma_sysfs_account_success_pages(struct cma *cma,
48						   unsigned long nr_pages) {};
49static inline void cma_sysfs_account_fail_pages(struct cma *cma,
50						unsigned long nr_pages) {};
51#endif
52#endif