On 04 February 2019 at 01:38PM, Christoph Hellwig wrote:
It seems like the pasemi driver fails to set a DMA mask, but seems
otherwise 64-bit DMA capable. The old PPC code didn't verify the
dma mask during the map operations, but the x86-derived generic
code does.
This patch just sets the DMA
On 01/02/2019 16:13, Christoph Hellwig wrote:
On Fri, Feb 01, 2019 at 02:47:17PM +, Robin Murphy wrote:
On 14/01/2019 09:41, Christoph Hellwig wrote:
No need for a __KERNEL__ guard outside uapi, make sure we pull in the
includes unconditionally so users can rely on it, and add a missing
On 14/01/2019 09:41, Christoph Hellwig wrote:
For entirely dma coherent architectures there is no good reason to ever
remap dma coherent allocation.
Yes there is, namely assembling large buffers without the need for
massive CMA areas and compaction overhead under memory fragmentation.
That
On 14/01/2019 09:41, Christoph Hellwig wrote:
Signed-off-by: Christoph Hellwig
Acked-by: Robin Murphy
---
arch/arm64/mm/dma-mapping.c | 15 +--
1 file changed, 1 insertion(+), 14 deletions(-)
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index
On 14/01/2019 09:41, Christoph Hellwig wrote:
Signed-off-by: Christoph Hellwig
Acked-by: Robin Murphy
---
drivers/iommu/dma-iommu.c | 13 +
include/linux/dma-iommu.h | 13 +
2 files changed, 2 insertions(+), 24 deletions(-)
diff --git
On Wed, Feb 06, 2019 at 02:45:34PM +0100, Christian Zigotzky wrote:
> I patched the source code from the Git 'powerpc-dma.6' with your patch
> today. Unfortunately the P.A. Semi Ethernet doesn't work with the patched
> Git kernel.
>
> After that I tried it with the patch applied over the working
On Wed, Feb 06, 2019 at 04:15:05PM +0100, Christoph Hellwig wrote:
> The last good one was 29e7e2287e196f48fe5d2a6e017617723ea979bf
> ("dma-direct: we might need GFP_DMA for 32-bit dma masks"), if I
> remember correctly. powerpc/dma: use the dma_direct mapping routines
> was the one that you said
On 01/02/2019 16:16, Christoph Hellwig wrote:
On Fri, Feb 01, 2019 at 03:24:45PM +, Robin Murphy wrote:
On 14/01/2019 09:41, Christoph Hellwig wrote:
Directly iterating over the pages makes the code a bit simpler and
prepares for the following changes.
It also defeats the whole purpose
Hi Christoph,
On Wed, Feb 06, 2019 at 08:07:26AM +0100, Christoph Hellwig wrote:
> On Tue, Feb 05, 2019 at 03:05:30PM -0800, Nicolin Chen wrote:
> > > And my other concern is that this skips allocating from the per-device
> > > pool, which drivers might rely on.
> >
> > Actually Robin had the
Hi Christoph,
I also didn’t notice the 32-bit DMA mask in your patch. I have to read your
patches and descriptions carefully in the future. I will test your new patch at
the weekend.
Thanks,
Christian
Sent from my iPhone
> On 6. Feb 2019, at 16:16, Christoph Hellwig wrote:
>
>> On Wed, Feb
On Wed, Feb 06, 2019 at 06:28:49PM -0800, Nicolin Chen wrote:
> So we will keep allocating single pages in dev->cma_area if it's
> present, in order to address your previous concern?
Yes.
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