On Wed, 30 Oct 2019 23:38:18 +0100
Christoph Hellwig [off-list ref] wrote:

On Wed, Oct 30, 2019 at 11:05:49PM +0100, Thomas Bogendoerfer wrote:

quoted

On Wed, 30 Oct 2019 14:12:30 -0700
Christoph Hellwig [off-list ref] wrote:

quoted

dma_direct_ is a low-level API that must never be used by drivers
directly.  Switch to use the proper DMA API instead.

is the 4kb/16kb alignment still guaranteed ? If not how is the way
to get such an alignment ?

The DMA API gives you page aligned memory. dma_direct doesn't give you
any gurantees as it is an internal API explicitly documented as not
for driver usage that can change at any time.

I didn't want to argue about that. What I'm interested in is a way how 
to allocate dma memory, which is 16kB aligned, via the DMA API ?

Thomas.

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