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59 lines
1.8 KiB
59 lines
1.8 KiB
/* |
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* include/linux/dmapool.h |
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* |
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* Allocation pools for DMAable (coherent) memory. |
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* |
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* This file is licensed under the terms of the GNU General Public |
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* License version 2. This program is licensed "as is" without any |
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* warranty of any kind, whether express or implied. |
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*/ |
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#ifndef LINUX_DMAPOOL_H |
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#define LINUX_DMAPOOL_H |
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#include <linux/scatterlist.h> |
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#include <asm/io.h> |
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struct device; |
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#ifdef CONFIG_HAS_DMA |
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struct dma_pool *dma_pool_create(const char *name, struct device *dev, |
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size_t size, size_t align, size_t allocation); |
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void dma_pool_destroy(struct dma_pool *pool); |
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void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, |
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dma_addr_t *handle); |
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void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr); |
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/* |
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* Managed DMA pool |
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*/ |
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struct dma_pool *dmam_pool_create(const char *name, struct device *dev, |
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size_t size, size_t align, size_t allocation); |
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void dmam_pool_destroy(struct dma_pool *pool); |
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#else /* !CONFIG_HAS_DMA */ |
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static inline struct dma_pool *dma_pool_create(const char *name, |
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struct device *dev, size_t size, size_t align, size_t allocation) |
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{ return NULL; } |
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static inline void dma_pool_destroy(struct dma_pool *pool) { } |
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static inline void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, |
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dma_addr_t *handle) { return NULL; } |
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static inline void dma_pool_free(struct dma_pool *pool, void *vaddr, |
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dma_addr_t addr) { } |
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static inline struct dma_pool *dmam_pool_create(const char *name, |
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struct device *dev, size_t size, size_t align, size_t allocation) |
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{ return NULL; } |
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static inline void dmam_pool_destroy(struct dma_pool *pool) { } |
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#endif /* !CONFIG_HAS_DMA */ |
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static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags, |
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dma_addr_t *handle) |
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{ |
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return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle); |
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} |
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#endif |
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