48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
#ifndef __CMA_H__
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#define __CMA_H__
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/*
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* There is always at least global CMA area and a few optional
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* areas configured in kernel .config.
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*/
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#ifdef CONFIG_CMA_AREAS
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#define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS)
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#else
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#define MAX_CMA_AREAS (0)
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#endif
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struct cma;
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extern unsigned long totalcma_pages;
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extern phys_addr_t cma_get_base(const struct cma *cma);
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extern unsigned long cma_get_size(const struct cma *cma);
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extern int __init cma_declare_contiguous_with_name(phys_addr_t base,
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phys_addr_t size, phys_addr_t limit,
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phys_addr_t alignment, unsigned int order_per_bit,
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bool fixed, struct cma **res_cma, const char *name);
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static inline int cma_declare_contiguous(phys_addr_t base,
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phys_addr_t size, phys_addr_t limit,
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phys_addr_t alignment, unsigned int order_per_bit,
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bool fixed, struct cma **res_cma)
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{
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return cma_declare_contiguous_with_name(base, size, limit, alignment,
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order_per_bit, fixed, res_cma,
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NULL);
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}
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extern int cma_init_reserved_mem_with_name(phys_addr_t base, phys_addr_t size,
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unsigned int order_per_bit,
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struct cma **res_cma, const char *name);
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static inline int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
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unsigned int order_per_bit,
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struct cma **res_cma)
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{
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return cma_init_reserved_mem_with_name(base, size, order_per_bit,
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res_cma, NULL);
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}
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extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align);
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extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
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#endif
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