| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Sasha Levin | 28b24c1 | 2015-04-14 15:44:57 -0700 | [diff] [blame] | 2 | #ifndef __MM_CMA_H__ |
| 3 | #define __MM_CMA_H__ |
| 4 | |
| 5 | struct cma { |
| 6 | unsigned long base_pfn; |
| 7 | unsigned long count; |
| 8 | unsigned long *bitmap; |
| 9 | unsigned int order_per_bit; /* Order of pages represented by one bit */ |
| 10 | struct mutex lock; |
| Sasha Levin | 26b02a1 | 2015-04-14 15:44:59 -0700 | [diff] [blame] | 11 | #ifdef CONFIG_CMA_DEBUGFS |
| 12 | struct hlist_head mem_head; |
| 13 | spinlock_t mem_head_lock; |
| 14 | #endif |
| Laura Abbott | f318dd0 | 2017-04-18 11:27:03 -0700 | [diff] [blame] | 15 | const char *name; |
| Sasha Levin | 28b24c1 | 2015-04-14 15:44:57 -0700 | [diff] [blame] | 16 | }; |
| 17 | |
| 18 | extern struct cma cma_areas[MAX_CMA_AREAS]; |
| 19 | extern unsigned cma_area_count; |
| 20 | |
| Gregory Fong | f21838e | 2015-08-14 15:35:21 -0700 | [diff] [blame] | 21 | static inline unsigned long cma_bitmap_maxno(struct cma *cma) |
| Sasha Levin | 28b24c1 | 2015-04-14 15:44:57 -0700 | [diff] [blame] | 22 | { |
| 23 | return cma->count >> cma->order_per_bit; |
| 24 | } |
| 25 | |
| 26 | #endif |