dev_get_coherent_memory

Name:dev_get_coherent_memory

Proto:static inline struct dma_coherent_mem *dev_get_coherent_memory(struct device *dev)

Type:struct dma_coherent_mem

Parameter:

Type	Parameter	Name
struct device *	dev

26

If dev && dma_mem Then Return dma_mem

28

Return NULL

**Caller**
Name	Describe
dma_alloc_from_dev_coherent	dma_alloc_from_dev_coherent() - allocate memory from device coherent pool@dev: device from which we allocate memory@size: size of requested memory area@dma_handle: This will be filled with the correct dma handle@ret: This pointer will be filled with
dma_release_from_dev_coherent	dma_release_from_dev_coherent() - free memory to device coherent memory pool@dev: device from which the memory was allocated@order: the order of pages allocated@vaddr: virtual address of allocated pages This checks whether the memory was allocated
dma_mmap_from_dev_coherent	dma_mmap_from_dev_coherent() - mmap memory from the device coherent pool@dev: device from which the memory was allocated@vma: vm_area for the userspace memory@vaddr: cpu address returned by dma_alloc_from_dev_coherent@size: size of the memory buffer

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