| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef __MM_CMA_H__ |
| 3 | #define __MM_CMA_H__ |
| 4 | |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 5 | #include <linux/debugfs.h> |
| 6 | |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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; |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 16 | struct debugfs_u32_array dfs_bitmap; |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 17 | #endif |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 18 | char name[CMA_MAX_NAME]; |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 |