include/linux/dmapool.h

   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