mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-30 13:52:50 +01:00
Marek Szyprowski
de9e14eebf
Add a function to create CMA region from previously reserved memory and add support for handling 'shared-dma-pool' reserved-memory device tree nodes. Based on previous code provided by Josh Cartwright <[email protected]> Signed-off-by: Marek Szyprowski <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Michal Nazarewicz <[email protected]> Cc: Grant Likely <[email protected]> Cc: Laura Abbott <[email protected]> Cc: Josh Cartwright <[email protected]> Cc: Joonsoo Kim <[email protected]> Cc: Kyungmin Park <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
31 lines
844 B
C
31 lines
844 B
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 phys_addr_t cma_get_base(struct cma *cma);
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extern unsigned long cma_get_size(struct cma *cma);
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extern int __init cma_declare_contiguous(phys_addr_t size,
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phys_addr_t base, 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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extern int cma_init_reserved_mem(phys_addr_t size,
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phys_addr_t base, int order_per_bit,
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struct cma **res_cma);
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extern struct page *cma_alloc(struct cma *cma, int count, unsigned int align);
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extern bool cma_release(struct cma *cma, struct page *pages, int count);
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#endif
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