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52 lines
1.4 KiB
52 lines
1.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __MM_CMA_H__ |
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#define __MM_CMA_H__ |
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#include <linux/debugfs.h> |
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#include <linux/kobject.h> |
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struct cma_kobject { |
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struct kobject kobj; |
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struct cma *cma; |
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}; |
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struct cma { |
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unsigned long base_pfn; |
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unsigned long count; |
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unsigned long *bitmap; |
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unsigned int order_per_bit; /* Order of pages represented by one bit */ |
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spinlock_t lock; |
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#ifdef CONFIG_CMA_DEBUGFS |
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struct hlist_head mem_head; |
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spinlock_t mem_head_lock; |
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struct debugfs_u32_array dfs_bitmap; |
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#endif |
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char name[CMA_MAX_NAME]; |
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#ifdef CONFIG_CMA_SYSFS |
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/* the number of CMA page successful allocations */ |
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atomic64_t nr_pages_succeeded; |
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/* the number of CMA page allocation failures */ |
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atomic64_t nr_pages_failed; |
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/* kobject requires dynamic object */ |
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struct cma_kobject *cma_kobj; |
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#endif |
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}; |
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extern struct cma cma_areas[MAX_CMA_AREAS]; |
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extern unsigned cma_area_count; |
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static inline unsigned long cma_bitmap_maxno(struct cma *cma) |
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{ |
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return cma->count >> cma->order_per_bit; |
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} |
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#ifdef CONFIG_CMA_SYSFS |
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void cma_sysfs_account_success_pages(struct cma *cma, unsigned long nr_pages); |
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void cma_sysfs_account_fail_pages(struct cma *cma, unsigned long nr_pages); |
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#else |
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static inline void cma_sysfs_account_success_pages(struct cma *cma, |
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unsigned long nr_pages) {}; |
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static inline void cma_sysfs_account_fail_pages(struct cma *cma, |
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unsigned long nr_pages) {}; |
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#endif |
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#endif
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