Transport-level Testing of NVMe Devices Using VFIO

Explore transport-level testing of NVMe devices using VFIO in this comprehensive conference talk. Dive into the intricacies of NVMe architecture, including submission queue entries, command queues, PCI configuration space, and NVMe controller registers. Learn about setting up admin queues, queue doorbells, PCI doorbells, and completion queue entries. Understand polling techniques, interrupt handling, and freeing completion queue entries. Delve into low-level NVMe operations and practical implementation. Discover the Virtual Function I/O Framework and I/O Memory Management Unit. Examine VFIO's boilerplate requirements and NVMe-specific functionality. Gain insights into emulation, VFIO-based NVMe controller initialization, and the Identify Controller process. Master the submission of commands, queue management, and completion handling. Explore the Controller Memory Buffer and its implications for NVMe device testing.