LCOV - code coverage report
Current view: top level - kernel/dma - dummy.c (source / functions) Hit Total Coverage
Test: Real Lines: 0 8 0.0 %
Date: 2020-10-17 15:46:16 Functions: 0 4 0.0 %
Legend: Neither, QEMU, Real, Both Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : // SPDX-License-Identifier: GPL-2.0
       2                 :            : /*
       3                 :            :  * Dummy DMA ops that always fail.
       4                 :            :  */
       5                 :            : #include <linux/dma-mapping.h>
       6                 :            : 
       7                 :          0 : static int dma_dummy_mmap(struct device *dev, struct vm_area_struct *vma,
       8                 :            :                 void *cpu_addr, dma_addr_t dma_addr, size_t size,
       9                 :            :                 unsigned long attrs)
      10                 :            : {
      11                 :          0 :         return -ENXIO;
      12                 :            : }
      13                 :            : 
      14                 :          0 : static dma_addr_t dma_dummy_map_page(struct device *dev, struct page *page,
      15                 :            :                 unsigned long offset, size_t size, enum dma_data_direction dir,
      16                 :            :                 unsigned long attrs)
      17                 :            : {
      18                 :          0 :         return DMA_MAPPING_ERROR;
      19                 :            : }
      20                 :            : 
      21                 :          0 : static int dma_dummy_map_sg(struct device *dev, struct scatterlist *sgl,
      22                 :            :                 int nelems, enum dma_data_direction dir,
      23                 :            :                 unsigned long attrs)
      24                 :            : {
      25                 :          0 :         return 0;
      26                 :            : }
      27                 :            : 
      28                 :          0 : static int dma_dummy_supported(struct device *hwdev, u64 mask)
      29                 :            : {
      30                 :          0 :         return 0;
      31                 :            : }
      32                 :            : 
      33                 :            : const struct dma_map_ops dma_dummy_ops = {
      34                 :            :         .mmap                   = dma_dummy_mmap,
      35                 :            :         .map_page               = dma_dummy_map_page,
      36                 :            :         .map_sg                 = dma_dummy_map_sg,
      37                 :            :         .dma_supported          = dma_dummy_supported,
      38                 :            : };
      39                 :            : EXPORT_SYMBOL(dma_dummy_ops);
    

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