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 #define CMA_MAX_NAME 64 8 9 struct cma { 10 unsigned long base_pfn; 11 unsigned long count; 12 unsigned long *bitmap; 13 unsigned int order_per_bit; /* Order of pages represented by one bit */ 14 struct mutex lock; 15 #ifdef CONFIG_CMA_DEBUGFS 16 struct hlist_head mem_head; 17 spinlock_t mem_head_lock; 18 struct debugfs_u32_array dfs_bitmap; 19 #endif 20 char name[CMA_MAX_NAME]; 21 }; 22 23 extern struct cma cma_areas[MAX_CMA_AREAS]; 24 extern unsigned cma_area_count; 25 26 static inline unsigned long cma_bitmap_maxno(struct cma *cma) 27 { 28 return cma->count >> cma->order_per_bit; 29 } 30 31 #endif 32