centos man page for dma_mmap_from_coherent

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 3.10					     June 2014						   DMA_MMAP_FROM_COHERE(9)