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DOCA-Device-Emulation

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DOCA Device Emulation

Type: Framework Tags: NVIDIA, DOCA, device emulation, PCIe, BlueField, DPU, virtio, NVMe, storage, virtualization Related: NVIDIA-DOCA, NVIDIA-BlueField-DPU, DOCA-SNAP, OVS-DOCA, DOCA-RDMA, DOCA-DPA, GPU-Direct-Storage, NVIDIA-DOCA-Platform-Framework, NVIDIA-Firmware-Tools Sources: https://docs.nvidia.com/doca/sdk/doca-device-emulation/index.html Last Updated: 2026-04-29

Summary

DOCA Device Emulation is NVIDIA’s DOCA subsystem for emulating PCIe devices from a BlueField DPU or SuperNIC. It gives developers low-level APIs for discovery, configuration, hot plug and unplug, management, and I/O handling so a host can interact with an emulated PCIe function while the logic is implemented in software on BlueField.

Detail

The current DOCA 3.3.0 guide explains the core model: a conventional host-to-PCIe-device path is replaced by a BlueField plus a DOCA Device Emulation application. The host still sees a PCIe function through its standard software interface, but host interactions are routed to software running on the BlueField instead of to a fixed hardware device.

This matters because many higher-level DOCA services depend on controlled host-facing device emulation. DOCA-SNAP uses BlueField storage emulation to present NVMe, virtio-blk, and virtio-fs style devices. Virtualized networking paths such as OVS-DOCA also sit near the same BlueField virtualization and representor concepts. DOCA Device Emulation is therefore the lowest-level wiki page for “BlueField presents a device to the host” workflows.

The docs also show why this page belongs with storage and network offload topics. Applications can combine device emulation with other DOCA libraries for host-memory DMA, RDMA or Ethernet traffic, encryption, compression, and additional acceleration. For AI systems, that connects emulated devices to direct storage paths, GPU-aware networking, and infrastructure services that free CPUs for GPU work.

Connections

  • NVIDIA-DOCA - Device Emulation is a DOCA subsystem.
  • NVIDIA-BlueField-DPU - BlueField implements the host-facing emulated PCIe device logic.
  • DOCA-SNAP - SNAP storage virtualization is built around BlueField device emulation.
  • OVS-DOCA - OVS acceleration shares BlueField virtualization and hardware offload concepts.
  • DOCA-RDMA - emulated-device applications can redirect data over RDMA-capable fabrics.
  • DOCA-DPA - DPA is an adjacent BlueField execution target for communication-centric offload code.
  • GPU-Direct-Storage - storage emulation and direct GPU data paths intersect in AI storage designs.
  • NVIDIA-DOCA-Platform-Framework - DPF can orchestrate BlueField services that rely on emulation.
  • NVIDIA-Firmware-Tools - emulation enablement often requires device configuration and firmware-level controls.

Source Excerpts

  • “emulate a PCIe device”
  • “hot plugging/unplugging”
  • “host is not aware that the PCIe function is emulated”

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