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	/* kobject requires dynamic object */
31	struct cma_kobject *cma_kobj;
32#endif
33	bool reserve_pages_on_error;
34};
35
36extern struct cma cma_areas[MAX_CMA_AREAS];
37extern unsigned cma_area_count;
38
39static inline unsigned long cma_bitmap_maxno(struct cma *cma)
40{
41	return cma->count >> cma->order_per_bit;
42}
43
44#ifdef CONFIG_CMA_SYSFS
45void cma_sysfs_account_success_pages(struct cma *cma, unsigned long nr_pages);
46void cma_sysfs_account_fail_pages(struct cma *cma, unsigned long nr_pages);
47#else
48static inline void cma_sysfs_account_success_pages(struct cma *cma,
49						   unsigned long nr_pages) {};
50static inline void cma_sysfs_account_fail_pages(struct cma *cma,
51						unsigned long nr_pages) {};
52#endif
53#endif