Hi Andre,
On 21.08.2013 17:03, Peter Grehan wrote:
The way to go should be 4K clusters as they are native to the
architecture.
IIRC a PCIe DMA can't cross a 4K boundary anyway
That's a 4G boundary, for some devices.
I meant a single PCIe DMA transaction can be at most 4K before it has to
set up another one?
4K is the maximum TLP size but that's rarely (ever?) used - 128 or 256
bytes is more common. A DMA operation is just a sequence of TLPs
originating from the endpoint.
later,
Peter.
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