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/* 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
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