1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*
* include/linux/dmapool.h
*
* Allocation pools for DMAable (coherent) memory.
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#ifndef LINUX_DMAPOOL_H
#define LINUX_DMAPOOL_H
#include <linux/scatterlist.h>
#include <asm/io.h>
struct device;
#ifdef CONFIG_HAS_DMA
struct dma_pool *dma_pool_create(const char *name, struct device *dev,
size_t size, size_t align, size_t allocation);
void dma_pool_destroy(struct dma_pool *pool);
void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
dma_addr_t *handle);
void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr);
/*
* Managed DMA pool
*/
struct dma_pool *dmam_pool_create(const char *name, struct device *dev,
size_t size, size_t align, size_t allocation);
void dmam_pool_destroy(struct dma_pool *pool);
#else /* !CONFIG_HAS_DMA */
static inline struct dma_pool *dma_pool_create(const char *name,
struct device *dev, size_t size, size_t align, size_t allocation)
{ return NULL; }
static inline void dma_pool_destroy(struct dma_pool *pool) { }
static inline void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
dma_addr_t *handle) { return NULL; }
static inline void dma_pool_free(struct dma_pool *pool, void *vaddr,
dma_addr_t addr) { }
static inline struct dma_pool *dmam_pool_create(const char *name,
struct device *dev, size_t size, size_t align, size_t allocation)
{ return NULL; }
static inline void dmam_pool_destroy(struct dma_pool *pool) { }
#endif /* !CONFIG_HAS_DMA */
static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags,
dma_addr_t *handle)
{
return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle);
}
#endif
|
