1DMA_MMAP_FROM_COHERE(9)  Device drivers infrastructure DMA_MMAP_FROM_COHERE(9)
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NAME

6       dma_mmap_from_coherent - try to mmap the memory allocated from
7       per-device coherent memory pool to userspace
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SYNOPSIS

10       int dma_mmap_from_coherent(struct device * dev,
11                                  struct vm_area_struct * vma, void * vaddr,
12                                  size_t size, int * ret);
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ARGUMENTS

15       dev
16           device from which the memory was allocated
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18       vma
19           vm_area for the userspace memory
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21       vaddr
22           cpu address returned by dma_alloc_from_coherent
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24       size
25           size of the memory buffer allocated by dma_alloc_from_coherent
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27       ret
28           result from remap_pfn_range
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DESCRIPTION

31       This checks whether the memory was allocated from the per-device
32       coherent memory pool and if so, maps that memory to the provided vma.
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34       Returns 1 if we correctly mapped the memory, or 0 if the caller should
35       proceed with mapping memory from generic pools.
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38Kernel Hackers Manual 3.10         June 2019           DMA_MMAP_FROM_COHERE(9)
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