On Wed, 20 May 2020 15:10:42 +0000 Ioana Ciornei wrote: > DPAA2 has frame queues per each Rx traffic class and the decision from which > queue > to pull frames from is made by the HW based on the queue priority within a > channel > (there is one channel per each CPU).
IOW you're reading the descriptor for the device memory/iomem address and the HW will return the next descriptor based on configured priority? Presumably strict priority? > If this should be modeled in software, then I assume there should be a NAPI > instance > for each traffic class and the stack should know in which order to call the > poll() > callbacks so that the priority is respected. Right, something like that. But IMHO not needed if HW can serve the right descriptor upon poll.
