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 17 struct device; 18 19 struct dma_pool *dma_pool_create(const char *name, struct device *dev, 20 size_t size, size_t align, size_t allocation); 21 22 void dma_pool_destroy(struct dma_pool *pool); 23 24 void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, 25 dma_addr_t *handle); 26 27 static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags, 28 dma_addr_t *handle) 29 { 30 return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle); 31 } 32 33 void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr); 34 35 /* 36 * Managed DMA pool 37 */ 38 struct dma_pool *dmam_pool_create(const char *name, struct device *dev, 39 size_t size, size_t align, size_t allocation); 40 void dmam_pool_destroy(struct dma_pool *pool); 41 42 #endif 43 44