1/*
 2 * include/linux/dmapool.h
 3 *
 4 * Allocation pools for DMAable (coherent) memory.
 5 *
 6 * This file is licensed under  the terms of the GNU General Public 
 7 * License version 2. This program is licensed "as is" without any 
 8 * warranty of any kind, whether express or implied.
 9 */
10
11#ifndef LINUX_DMAPOOL_H
12#define	LINUX_DMAPOOL_H
13
 
14#include <asm/io.h>
15#include <asm/scatterlist.h>
 
 
 
16
17struct dma_pool *dma_pool_create(const char *name, struct device *dev, 
18			size_t size, size_t align, size_t allocation);
19
20void dma_pool_destroy(struct dma_pool *pool);
21
22void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
23		     dma_addr_t *handle);
24
25void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr);
26
27/*
28 * Managed DMA pool
29 */
30struct dma_pool *dmam_pool_create(const char *name, struct device *dev,
31				  size_t size, size_t align, size_t allocation);
32void dmam_pool_destroy(struct dma_pool *pool);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
33
34#endif
35

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