LCOV - code coverage report
Current view: top level - include/linux - dmapool.h (source / functions) Hit Total Coverage
Test: combined.info Lines: 0 2 0.0 %
Date: 2022-04-01 14:35:51 Functions: 0 0 -
Branches: 0 0 -

           Branch data     Line data    Source code
       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                 :            : #ifdef CONFIG_HAS_DMA
      20                 :            : 
      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                 :            : 
      26                 :            : void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
      27                 :            :                      dma_addr_t *handle);
      28                 :            : void dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t addr);
      29                 :            : 
      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                 :            : 
      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                 :          0 : static inline void *dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags,
      53                 :            :                                     dma_addr_t *handle)
      54                 :            : {
      55                 :          0 :         return dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle);
      56                 :            : }
      57                 :            : 
      58                 :            : #endif
      59                 :            : 

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