DMA_MMAP_FROM_COHERE(9)           Device drivers infrastructure           DMA_MMAP_FROM_COHERE(9)



NAME
       dma_mmap_from_coherent - try to mmap the memory allocated from per-device coherent memory
       pool to userspace

SYNOPSIS
       int dma_mmap_from_coherent(struct device * dev, struct vm_area_struct * vma, void * vaddr,
                                  size_t size, int * ret);

ARGUMENTS
       dev
           device from which the memory was allocated

       vma
           vm_area for the userspace memory

       vaddr
           cpu address returned by dma_alloc_from_coherent

       size
           size of the memory buffer allocated by dma_alloc_from_coherent

       ret
           result from remap_pfn_range

DESCRIPTION
       This checks whether the memory was allocated from the per-device coherent memory pool and
       if so, maps that memory to the provided vma.

       Returns 1 if we correctly mapped the memory, or 0 if the caller should proceed with
       mapping memory from generic pools.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   DMA_MMAP_FROM_COHERE(9)