On Fri, Aug 07, 2015 at 04:48:28PM +0200, Michal Nazarewicz wrote: > On Fri, Aug 07 2015, Feng Tang wrote: > > As I described above, the dummy struct device is only needed for > > dma request, its lifetime is align with the cma_heap itself. > > Again, this is from perspective of someone who is unfamiliar with ION, > but perhaps a viable solution is to bypass DMA API and just call > cma_alloc directly?
For ion cma heap, the buffer allocation func ion_cma_allocate() will call dma_alloc_coherent(dev, ...). And dma_alloc_coherent() is implemented by each architeture(arm/m68k/x86 etc), and many Arch's implementation doesn't use cma, but use alloc_pages() like APIs. So I'm afraid we can't direcly call cma_alloc directly here. Thanks, Feng -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
