On 10/01/18 08:00, Christoph Hellwig wrote:
phys_to_dma, dma_to_phys and dma_capable are helpers published by
architecture code for use of swiotlb and xen-swiotlb only. Drivers are
not supposed to use these directly, but use the DMA API instead.
Move these to a new asm/dma-direct.h helper, included by a
linux/dma-direct.h wrapper that provides the default linear mapping
unless the architecture wants to override it.
Signed-off-by: Christoph Hellwig <h...@lst.de>
---
[...]
drivers/crypto/marvell/cesa.c | 1 +
drivers/mtd/nand/qcom_nandc.c | 1 +
I took a look at these, and it seems their phys_to_dma() usage is doing
the thing which we subsequently formalised as dma_map_resource(). I've
had a crack at a quick patch to update the CESA driver; qcom_nandc looks
slightly more complex in that the changes probably need to span the BAM
dmaengine driver as well.
In the process, though, I stumbled across gen_pool_dma_alloc() - yuck,
something needs doing there, for sure...
Robin.
