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 #include <linux/android_vendor.h> 8 9 struct cma_kobject { 10 struct kobject kobj; 11 struct cma *cma; 12 }; 13 14 struct cma { 15 unsigned long base_pfn; 16 unsigned long count; 17 unsigned long *bitmap; 18 unsigned int order_per_bit; /* Order of pages represented by one bit */ 19 struct mutex lock; 20 #ifdef CONFIG_CMA_DEBUGFS 21 struct hlist_head mem_head; 22 spinlock_t mem_head_lock; 23 struct debugfs_u32_array dfs_bitmap; 24 #endif 25 char name[CMA_MAX_NAME]; 26 #ifdef CONFIG_CMA_SYSFS 27 /* the number of CMA page successful allocations */ 28 atomic64_t nr_pages_succeeded; 29 /* the number of CMA page allocation failures */ 30 atomic64_t nr_pages_failed; 31 /* kobject requires dynamic object */ 32 struct cma_kobject *cma_kobj; 33 #endif 34 ANDROID_OEM_DATA_ARRAY(1, 4); 35 }; 36 37 extern struct cma cma_areas[MAX_CMA_AREAS]; 38 extern unsigned cma_area_count; 39 cma_bitmap_maxno(struct cma * cma)40static inline unsigned long cma_bitmap_maxno(struct cma *cma) 41 { 42 return cma->count >> cma->order_per_bit; 43 } 44 45 #ifdef CONFIG_CMA_SYSFS 46 void cma_sysfs_account_success_pages(struct cma *cma, unsigned long nr_pages); 47 void cma_sysfs_account_fail_pages(struct cma *cma, unsigned long nr_pages); 48 #else cma_sysfs_account_success_pages(struct cma * cma,unsigned long nr_pages)49static inline void cma_sysfs_account_success_pages(struct cma *cma, 50 unsigned long nr_pages) {}; cma_sysfs_account_fail_pages(struct cma * cma,unsigned long nr_pages)51static inline void cma_sysfs_account_fail_pages(struct cma *cma, 52 unsigned long nr_pages) {}; 53 #endif 54 #endif 55