From: Thomas Petazzoni
> Sent: 07 March 2017 18:12
> Hello,
>
> On Tue, 7 Mar 2017 17:24:21 +, David Laight wrote:
>
> > Are the coherent mappings just used for ring structures?
> > If it might be reasonable to allocate them as a single entity,
> > thus guaranteeing they all reside in a
Hello,
On Tue, 7 Mar 2017 17:24:21 +, David Laight wrote:
> Are the coherent mappings just used for ring structures?
> If it might be reasonable to allocate them as a single entity,
> thus guaranteeing they all reside in a single 4G region.
Do we have the guarantee that a DMA coherent
From: Thomas Petazzoni
> Sent: 07 March 2017 15:53
> On PPv2.2, the streaming mappings can be anywhere in the first 40 bits
> of the physical address space. However, for the coherent mappings, we
> still need them to be in the first 32 bits of the address space,
> because all BM pools share a
On PPv2.2, the streaming mappings can be anywhere in the first 40 bits
of the physical address space. However, for the coherent mappings, we
still need them to be in the first 32 bits of the address space,
because all BM pools share a single register to store the high 32 bits
of the BM pool
