projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 28b24c1f SL |
2 | #ifndef __MM_CMA_H__ |
| 3 | #define __MM_CMA_H__ | |
| 4 | ||
| a2b992c8 | 5 | #include <linux/debugfs.h> |
| 43ca106f MK |
6 | #include <linux/kobject.h> |
| 7 | ||
| 8 | struct cma_kobject { | |
| 9 | struct kobject kobj; | |
| 10 | struct cma *cma; | |
| 11 | }; | |
| a2b992c8 | 12 | |
| 28b24c1f SL |
13 | struct cma { |
| 14 | unsigned long base_pfn; | |
| 15 | unsigned long count; | |
| 16 | unsigned long *bitmap; | |
| 17 | unsigned int order_per_bit; /* Order of pages represented by one bit */ | |
| 0ef7dcac | 18 | spinlock_t lock; |
| 26b02a1f SL |
19 | #ifdef CONFIG_CMA_DEBUGFS |
| 20 | struct hlist_head mem_head; | |
| 21 | spinlock_t mem_head_lock; | |
| a2b992c8 | 22 | struct debugfs_u32_array dfs_bitmap; |
| 26b02a1f | 23 | #endif |
| 18e98e56 | 24 | char name[CMA_MAX_NAME]; |
| 43ca106f MK |
25 | #ifdef CONFIG_CMA_SYSFS |
| 26 | /* the number of CMA page successful allocations */ | |
| 27 | atomic64_t nr_pages_succeeded; | |
| 28 | /* the number of CMA page allocation failures */ | |
| 29 | atomic64_t nr_pages_failed; | |
| 30 | /* kobject requires dynamic object */ | |
| 31 | struct cma_kobject *cma_kobj; | |
| 32 | #endif | |
| 27d121d0 | 33 | bool reserve_pages_on_error; |
| 28b24c1f SL |
34 | }; |
| 35 | ||
| 36 | extern struct cma cma_areas[MAX_CMA_AREAS]; | |
| 37 | extern unsigned cma_area_count; | |
| 38 | ||
| f21838e0 | 39 | static inline unsigned long cma_bitmap_maxno(struct cma *cma) |
| 28b24c1f SL |
40 | { |
| 41 | return cma->count >> cma->order_per_bit; | |
| 42 | } | |
| 43 | ||
| 43ca106f MK |
44 | #ifdef CONFIG_CMA_SYSFS |
| 45 | void cma_sysfs_account_success_pages(struct cma *cma, unsigned long nr_pages); | |
| 46 | void cma_sysfs_account_fail_pages(struct cma *cma, unsigned long nr_pages); | |
| 47 | #else | |
| 48 | static inline void cma_sysfs_account_success_pages(struct cma *cma, | |
| 49 | unsigned long nr_pages) {}; | |
| 50 | static inline void cma_sysfs_account_fail_pages(struct cma *cma, | |
| 51 | unsigned long nr_pages) {}; | |
| 52 | #endif | |
| 28b24c1f | 53 | #endif |