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#ifndef __LINUX_CMA_H
#define __LINUX_CMA_H
/*
* Contiguous Memory Allocator for DMA mapping framework
* Copyright (c) 2010-2011 by Samsung Electronics.
* Written by:
* Marek Szyprowski <m.szyprowski@samsung.com>
* Michal Nazarewicz <mina86@mina86.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License or (at your optional) any later version of the license.
*/
#ifdef __KERNEL__
struct cma;
struct page;
struct device;
#ifdef CONFIG_CMA
#define MAX_CMA_AREAS (1 + CONFIG_CMA_AREAS)
extern struct cma *dma_contiguous_default_area;
void dma_contiguous_reserve(phys_addr_t addr_limit);
int dma_declare_contiguous(struct device *dev, unsigned long size,
phys_addr_t base, phys_addr_t limit);
struct page *dma_alloc_from_contiguous(struct device *dev, int count,
unsigned int order);
bool dma_release_from_contiguous(struct device *dev, struct page *pages,
int count);
#else
#define MAX_CMA_AREAS (0)
static inline void dma_contiguous_reserve(phys_addr_t limit) { }
static inline
int dma_declare_contiguous(struct device *dev, unsigned long size,
phys_addr_t base, phys_addr_t limit)
{
return -ENOSYS;
}
static inline
struct page *dma_alloc_from_contiguous(struct device *dev, int count,
unsigned int order)
{
return NULL;
}
static inline
bool dma_release_from_contiguous(struct device *dev, struct page *pages,
int count)
{
return false;
}
#endif
#endif
#endif
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