Queue Setup - 3.0 English

Versal ACAP CPM DMA and Bridge Mode for PCI Express Product Guide (PG347)

Document ID
PG347
Release Date
2022-06-15
Version
3.0 English
  • Clear Descriptor Software Context.
  • Clear Descriptor Hardware Context.
  • Clear Descriptor Credit Context.
  • Set-up Descriptor Software Context.
  • Clear Prefetch Context.
  • Clear Completion Context.
  • Set-up Completion Context.
    • If interrupts/status writes are desired (enabled in the Completion Context), an initial Completion CIDX update is required to send the hardware into a state where it is sensitive to trigger conditions. This initial CIDX update is required, because when out of reset, the hardware initializes into an unarmed state.
  • Set-up Prefetch Context.