On Mon, Nov 19, 2018 at 5:50 PM Robin Murphy wrote:
>
> On 19/11/2018 14:18, Ramon Fried wrote:
> > On Tue, Oct 9, 2018 at 8:02 AM Benjamin Herrenschmidt
> > wrote:
> >>
> >> On Wed, 2018-10-03 at 16:10 -0700, Alexander Duyck wrote:
> -* Because 32-bit DMA masks are so common we expe
On 19/11/2018 14:18, Ramon Fried wrote:
On Tue, Oct 9, 2018 at 8:02 AM Benjamin Herrenschmidt
wrote:
On Wed, 2018-10-03 at 16:10 -0700, Alexander Duyck wrote:
-* Because 32-bit DMA masks are so common we expect every architecture
-* to be able to satisfy them - either by not s
On Tue, Oct 9, 2018 at 8:02 AM Benjamin Herrenschmidt
wrote:
>
> On Wed, 2018-10-03 at 16:10 -0700, Alexander Duyck wrote:
> > > -* Because 32-bit DMA masks are so common we expect every
> > > architecture
> > > -* to be able to satisfy them - either by not supporting more
> > >
On Wed, 2018-10-03 at 16:10 -0700, Alexander Duyck wrote:
> > -* Because 32-bit DMA masks are so common we expect every
> > architecture
> > -* to be able to satisfy them - either by not supporting more
> > physical
> > -* memory, or by providing a ZONE_DMA32. If neither
On Thu, Sep 27, 2018 at 3:38 PM Christoph Hellwig wrote:
>
> This way an architecture with less than 4G of RAM can support dma_mask
> smaller than 32-bit without a ZONE_DMA. Apparently that is a common
> case on powerpc.
>
> Signed-off-by: Christoph Hellwig
> Reviewed-by: Robin Murphy
> ---
>
This way an architecture with less than 4G of RAM can support dma_mask
smaller than 32-bit without a ZONE_DMA. Apparently that is a common
case on powerpc.
Signed-off-by: Christoph Hellwig
Reviewed-by: Robin Murphy
---
kernel/dma/direct.c | 28
1 file changed, 16 i
[ oops, I should have looked at the replies first, now I see Ben already
had the same thing to say about #3... ]
On 27/09/18 14:49, Christoph Hellwig wrote:
On Thu, Sep 27, 2018 at 11:50:14AM +1000, Benjamin Herrenschmidt wrote:
-* to be able to satisfy them - either by not supporting
On Thu, Sep 27, 2018 at 11:50:14AM +1000, Benjamin Herrenschmidt wrote:
> > -* to be able to satisfy them - either by not supporting more physical
> > -* memory, or by providing a ZONE_DMA32. If neither is the case, the
> > -* architecture needs to use an IOMMU instead of the direct ma
On Thu, 2018-09-20 at 20:52 +0200, Christoph Hellwig wrote:
> This way an architecture with less than 4G of RAM can support dma_mask
> smaller than 32-bit without a ZONE_DMA. Apparently that is a common
> case on powerpc.
Anything that uses a b43 wifi adapter which has a 31-bit limitation
actuall
This way an architecture with less than 4G of RAM can support dma_mask
smaller than 32-bit without a ZONE_DMA. Apparently that is a common
case on powerpc.
Signed-off-by: Christoph Hellwig
---
kernel/dma/direct.c | 28
1 file changed, 16 insertions(+), 12 deletions(
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