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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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C
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879/* * include/linux/dmapool.h * * Allocation pools for DMAable (coherent) memory. * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */
#ifndef LINUX_DMAPOOL_H#define LINUX_DMAPOOL_H
#include <linux/nodemask_types.h>#include <linux/scatterlist.h>#include <asm/io.h>
struct device;
#ifdef CONFIG_HAS_DMA
struct dma_pool *dma_pool_create_node(const char *name, struct device *dev, size_t size, size_t align, size_t boundary, int node);
void dma_pool_destroy(struct dma_pool *pool);
void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle);void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr);
/* * Managed DMA pool */struct dma_pool *dmam_pool_create(const char *name, struct device *dev, size_t size, size_t align, size_t allocation);void dmam_pool_destroy(struct dma_pool *pool);
#else /* !CONFIG_HAS_DMA */static inline struct dma_pool *dma_pool_create_node(const char *name, struct device *dev, size_t size, size_t align, size_t boundary, int node){ return NULL;}static inline void dma_pool_destroy(struct dma_pool *pool) { }static inline void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle) { return NULL; }static inline void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr) { }static inline struct dma_pool *dmam_pool_create(const char *name, struct device *dev, size_t size, size_t align, size_t allocation){ return NULL; }static inline void dmam_pool_destroy(struct dma_pool *pool) { }#endif /* !CONFIG_HAS_DMA */
static inline struct dma_pool *dma_pool_create(const char *name, struct device *dev, size_t size, size_t align, size_t boundary){ return dma_pool_create_node(name, dev, size, align, boundary, NUMA_NO_NODE);}
/** * dma_pool_zalloc - Get a zero-initialized block of DMA coherent memory. * @pool: dma pool that will produce the block * @mem_flags: GFP_* bitmask * @handle: pointer to dma address of block * * Same as dma_pool_alloc(), but the returned memory is zeroed. */static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle){ return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle);}
#endif