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.