BCM1250 Current Descriptor

["Gilad Benjamini" <gilad@riverhead.com>]

Hi,

I have a question which is specific for the BCM1250. I hope this

is the right forum to ask this, if not, my apologies.

 

In an RX DMA channel the BCM1250 signals a received packet

by turning on the SOP bit. When a packet arrives, the current_descriptor

register also updates to the next packet.

Could there be a (non-trivial) time gap between the update of those ?

We see a scenario where the SOP bit is on, but the descriptor count

shows that the packet still belongs to the DMA. How can this be ?

 

TIA