Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Christoph Hellwig | 84be456 | 2015-05-01 12:46:15 +0200 | [diff] [blame] | 14 | #include <linux/scatterlist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <asm/io.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | |
Mark Brown | ce66b03 | 2015-04-07 14:26:44 -0700 | [diff] [blame] | 17 | struct device; |
| 18 | |
Geert Uytterhoeven | c1ce6c2 | 2018-03-16 14:25:43 +0100 | [diff] [blame^] | 19 | #ifdef CONFIG_HAS_DMA |
| 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | struct dma_pool *dma_pool_create(const char *name, struct device *dev, |
| 22 | size_t size, size_t align, size_t allocation); |
| 23 | |
| 24 | void dma_pool_destroy(struct dma_pool *pool); |
| 25 | |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 26 | void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, |
Victor Fusco | 3a11ec5 | 2005-09-10 00:26:49 -0700 | [diff] [blame] | 27 | dma_addr_t *handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr); |
| 29 | |
Tejun Heo | 9ac7849 | 2007-01-20 16:00:26 +0900 | [diff] [blame] | 30 | /* |
| 31 | * Managed DMA pool |
| 32 | */ |
| 33 | struct dma_pool *dmam_pool_create(const char *name, struct device *dev, |
| 34 | size_t size, size_t align, size_t allocation); |
| 35 | void dmam_pool_destroy(struct dma_pool *pool); |
| 36 | |
Geert Uytterhoeven | c1ce6c2 | 2018-03-16 14:25:43 +0100 | [diff] [blame^] | 37 | #else /* !CONFIG_HAS_DMA */ |
| 38 | static 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; } |
| 41 | static inline void dma_pool_destroy(struct dma_pool *pool) { } |
| 42 | static inline void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, |
| 43 | dma_addr_t *handle) { return NULL; } |
| 44 | static inline void dma_pool_free(struct dma_pool *pool, void *vaddr, |
| 45 | dma_addr_t addr) { } |
| 46 | static 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; } |
| 49 | static inline void dmam_pool_destroy(struct dma_pool *pool) { } |
| 50 | #endif /* !CONFIG_HAS_DMA */ |
| 51 | |
| 52 | static 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | #endif |
| 59 | |