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dma-mapping: merge <linux/dma-contiguous.h> into <linux/dma-map-ops.h>

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Merge dma-contiguous.h into dma-map-ops.h, after removing the comment
describing the contiguous allocator into kernel/dma/contigous.c.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2020-09-11 10:56:52 +02:00
parent 580a0cc9c3
commit 0b1abd1fb7
28 changed files with 112 additions and 164 deletions
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65
include/linux/dma-map-ops.h
View file

@ -8,6 +8,8 @@
#include <linux/dma-mapping.h>
struct cma;
struct dma_map_ops {
void *(*alloc)(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp,
@ -94,6 +96,69 @@ static inline void set_dma_ops(struct device *dev,
}
#endif /* CONFIG_DMA_OPS */
#ifdef CONFIG_DMA_CMA
extern struct cma *dma_contiguous_default_area;
static inline struct cma *dev_get_cma_area(struct device *dev)
{
if (dev && dev->cma_area)
return dev->cma_area;
return dma_contiguous_default_area;
}
void dma_contiguous_reserve(phys_addr_t addr_limit);
int __init dma_contiguous_reserve_area(phys_addr_t size, phys_addr_t base,
phys_addr_t limit, struct cma **res_cma, bool fixed);
struct page *dma_alloc_from_contiguous(struct device *dev, size_t count,
unsigned int order, bool no_warn);
bool dma_release_from_contiguous(struct device *dev, struct page *pages,
int count);
struct page *dma_alloc_contiguous(struct device *dev, size_t size, gfp_t gfp);
void dma_free_contiguous(struct device *dev, struct page *page, size_t size);
#else /* CONFIG_DMA_CMA */
static inline struct cma *dev_get_cma_area(struct device *dev)
{
return NULL;
}
static inline void dma_contiguous_reserve(phys_addr_t limit)
{
}
static inline int dma_contiguous_reserve_area(phys_addr_t size,
phys_addr_t base, phys_addr_t limit, struct cma **res_cma,
bool fixed)
{
return -ENOSYS;
}
static inline struct page *dma_alloc_from_contiguous(struct device *dev,
size_t count, unsigned int order, bool no_warn)
{
return NULL;
}
static inline bool dma_release_from_contiguous(struct device *dev,
struct page *pages, int count)
{
return false;
}
/* Use fallback alloc() and free() when CONFIG_DMA_CMA=n */
static inline struct page *dma_alloc_contiguous(struct device *dev, size_t size,
gfp_t gfp)
{
return NULL;
}
static inline void dma_free_contiguous(struct device *dev, struct page *page,
size_t size)
{
__free_pages(page, get_order(size));
}
#endif /* CONFIG_DMA_CMA*/
#ifdef CONFIG_DMA_PERNUMA_CMA
void dma_pernuma_cma_reserve(void);
#else
static inline void dma_pernuma_cma_reserve(void) { }
#endif /* CONFIG_DMA_PERNUMA_CMA */
#ifdef CONFIG_DMA_DECLARE_COHERENT
int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
dma_addr_t device_addr, size_t size);