| dma_mmap_from_coherent(9) - phpMan
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)
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