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 27