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 struct cma { 8 unsigned long base_pfn; 9 unsigned long count; 10 unsigned long *bitmap; 11 unsigned int order_per_bit; /* Order of pages represented by one bit */ 12 struct mutex lock; 13 #ifdef CONFIG_CMA_DEBUGFS 14 struct hlist_head mem_head; 15 spinlock_t mem_head_lock; 16 struct debugfs_u32_array dfs_bitmap; 17 #endif 18 char name[CMA_MAX_NAME]; 19 }; 20 21 extern struct cma cma_areas[MAX_CMA_AREAS]; 22 extern unsigned cma_area_count; 23 24 static inline unsigned long cma_bitmap_maxno(struct cma *cma) 25 { 26 return cma->count >> cma->order_per_bit; 27 } 28 29 #endif 30