On Thu, Nov 21, 2013 at 12:11:35PM +0000, Russell King - ARM Linux wrote:
On Thu, Nov 21, 2013 at 12:06:00PM +0000, Catalin Marinas wrote:
On Wed, Nov 20, 2013 at 09:41:18PM +0000, Laura Abbott wrote:
I noticed there is currently no CMA support for AArch64. Is this already on someone's TODO list or is this still open?
It's more like a wish list but there were other things that took priority. The arm64 DMA mapping code currently only supports swiotlb and our next plan is for IOMMU mapping. But I would like parts of the DMA IOMMU code under arch/arm to be made into a library (similar to the lib/swiotlb.c) so that other architectures can easily make use of it.
If you're referring to dmabounce.c, that's a 100% no-way-ever-even-if- hell-freezes-over NACK.
Does dmabounce.c implement IOMMU support? I'm talking about functions like __alloc_iova, __iommu_create_mapping etc.
The generic swiotlb code has enough bouncing capabilities for my needs.