1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __MM_CMA_H__
 3#define __MM_CMA_H__
 4
 
 
 
 
 
 
 
 
 5struct cma {
 6	unsigned long   base_pfn;
 7	unsigned long   count;
 8	unsigned long   *bitmap;
 9	unsigned int order_per_bit; /* Order of pages represented by one bit */
10	struct mutex    lock;
11#ifdef CONFIG_CMA_DEBUGFS
12	struct hlist_head mem_head;
13	spinlock_t mem_head_lock;
 
14#endif
15	const char *name;
 
 
 
 
 
 
 
 
 
 
 
16};
17
18extern struct cma cma_areas[MAX_CMA_AREAS];
19extern unsigned cma_area_count;
20
21static inline unsigned long cma_bitmap_maxno(struct cma *cma)
22{
23	return cma->count >> cma->order_per_bit;
24}
25
 
 
 
 
 
 
 
 
 
 
 
 
26#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	/* the number of CMA page released */
31	atomic64_t nr_pages_released;
32	/* kobject requires dynamic object */
33	struct cma_kobject *cma_kobj;
34#endif
35	bool reserve_pages_on_error;
36};
37
38extern struct cma cma_areas[MAX_CMA_AREAS];
39extern unsigned cma_area_count;
40
41static inline unsigned long cma_bitmap_maxno(struct cma *cma)
42{
43	return cma->count >> cma->order_per_bit;
44}
45
46#ifdef CONFIG_CMA_SYSFS
47void cma_sysfs_account_success_pages(struct cma *cma, unsigned long nr_pages);
48void cma_sysfs_account_fail_pages(struct cma *cma, unsigned long nr_pages);
49void cma_sysfs_account_release_pages(struct cma *cma, unsigned long nr_pages);
50#else
51static inline void cma_sysfs_account_success_pages(struct cma *cma,
52						   unsigned long nr_pages) {};
53static inline void cma_sysfs_account_fail_pages(struct cma *cma,
54						unsigned long nr_pages) {};
55static inline void cma_sysfs_account_release_pages(struct cma *cma,
56						   unsigned long nr_pages) {};
57#endif
58#endif