dma_mmap_from_coherent - try to mmap the memory allocated from per-device coherent memory pool to userspace
2. SYNOPSIS ▲
int dma_mmap_from_coherent(struct device * dev , struct vm_area_struct * vma , void * vaddr , size_t size , int * ret );
3. ARGUMENTS ▲
device from which the memory was allocated
vm_area for the userspace memory
cpu address returned by dma_alloc_from_coherent
size of the memory buffer allocated by dma_alloc_from_coherent
result from remap_pfn_range
4. 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.
5. COPYRIGHT ▲