The limitations of the QDMA are as follows:
- The DMA supports a maximum of 256 Queues on any VF function.
- Slave Bridge AXI does not support Narrow Burst transfers.Recommended: Use AXI SmartConnect to support Narrow Burst.
- ECC and Slave Narrow Burst support is mutually exclusive.
- If you want an ECC feature, the recommendation is to up-size your AXI Master externally.
- SRIOV is not supported in bridge mode.
- This IP architecture assumes exclusive use of one or more complete GT quads, regardless of the designed link width. While it might be possible to share unused lanes in the GT quad with other instances of this IP, non-PCIe IPs, or custom GT-based interfaces for x2 and x1 link widths, AMD does not support evaluations or implementations of such sharing arrangements. The feasibility of sharing depends on the specific GT configuration required for other protocols, links, and lanes intended to share the GT quad. Factors affecting GT configuration include external REFCLKs, fabric design clocks and resets, GT clock management resources, connectivity rules, mode, and electrical settings.