On 08/31/2010 07:33 AM, Ralf Baechle wrote:
On Mon, Aug 30, 2010 at 09:58:27PM +0800, loody wrote:
after reading the DMA api document and check the source code.
I found mips seems not implement "dma map ops", but x86 has implemented it.
What are they used for and why mips don't implement it?
This is useful for multiple sets of methods on more complicated systems.
Right now we just don't need that.
That said, I am preparing a set of patches that converts MIPS to use
struct dma_map_ops. They turn out to be useful in systems where PCI
devices need different treatment than on-chip devices, and when bounce
buffers are needed form some devices, but not others.
David Daney
