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Should i.MX 8 ENET BD and buffers be cacheable?

Question asked by Etienne Alepins on Apr 21, 2020
Latest reply on Apr 21, 2020 by Yuri Muhin



With i.MX 8M (or i.MX 8X), can the RX and TX buffer descriptors (BD) used by the ENET Ethernet device be cacheable? Same question for the buffers pointed to by the BD?


That could enhance SW performance. If they can be cacheable, it means that the ENET is aware of a change made by Cortex-A53 (or Cortex-A35) core to the BD in DDR by automatic HW cache coherency mechanism? (snooping)