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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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C
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465/* SPDX-License-Identifier: GPL-2.0 */#ifndef __CMA_H__#define __CMA_H__
#include <linux/init.h>#include <linux/types.h>#include <linux/numa.h>
#ifdef CONFIG_CMA_AREAS#define MAX_CMA_AREAS CONFIG_CMA_AREAS#endif
#define CMA_MAX_NAME 64
/* * the buddy -- especially pageblock merging and alloc_contig_range() * -- can deal with only some pageblocks of a higher-order page being * MIGRATE_CMA, we can use pageblock_nr_pages. */#define CMA_MIN_ALIGNMENT_PAGES pageblock_nr_pages#define CMA_MIN_ALIGNMENT_BYTES (PAGE_SIZE * CMA_MIN_ALIGNMENT_PAGES)
struct cma;
extern unsigned long totalcma_pages;extern phys_addr_t cma_get_base(const struct cma *cma);extern unsigned long cma_get_size(const struct cma *cma);extern const char *cma_get_name(const struct cma *cma);
extern int __init cma_declare_contiguous_nid(phys_addr_t base, phys_addr_t size, phys_addr_t limit, phys_addr_t alignment, unsigned int order_per_bit, bool fixed, const char *name, struct cma **res_cma, int nid);static inline int __init cma_declare_contiguous(phys_addr_t base, phys_addr_t size, phys_addr_t limit, phys_addr_t alignment, unsigned int order_per_bit, bool fixed, const char *name, struct cma **res_cma){ return cma_declare_contiguous_nid(base, size, limit, alignment, order_per_bit, fixed, name, res_cma, NUMA_NO_NODE);}extern int __init cma_declare_contiguous_multi(phys_addr_t size, phys_addr_t align, unsigned int order_per_bit, const char *name, struct cma **res_cma, int nid);extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, unsigned int order_per_bit, const char *name, struct cma **res_cma);extern struct page *cma_alloc(struct cma *cma, unsigned long count, unsigned int align, bool no_warn);extern bool cma_release(struct cma *cma, const struct page *pages, unsigned long count);
struct page *cma_alloc_frozen(struct cma *cma, unsigned long count, unsigned int align, bool no_warn);struct page *cma_alloc_frozen_compound(struct cma *cma, unsigned int order);bool cma_release_frozen(struct cma *cma, const struct page *pages, unsigned long count);
extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data);extern bool cma_intersects(struct cma *cma, unsigned long start, unsigned long end);
extern void cma_reserve_pages_on_error(struct cma *cma);#endif