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Solarflare Server Adapter User Guide
SR ‐ IOV Virtualization Using ESXi
Issue 20 © Solarflare Communications 2017 370
8.12 DirectPath I/O
DirectPath I/O allows a VM access to PF on platforms having an IOMMU. Platform
support for SR ‐ IOV is not required.
Solarflare SFN7000 and SFN8000 series adapters can be partitioned into multiple
PCIe PFs, supporting up to 16 PCIe physical functions.
For details of NIC Partitioning see NIC Partitioning on page 74 .
Partition the Adapter
The Solarflare NIC can be partitioned to expose up to 16 PFs using the sfboot
command from the ESXi host command line interface:
# sfboot ‐‐ adapter=vmnic6 vf ‐ count=0 pf ‐ count=4 switch ‐ mode=partitioning
The server must be cold ‐ power cycled. When the server restarts, PFs will be visible
in the host:
# lspci ‐ vvv | grep Solarflare


0000:07:00.0 Ethernet controller Network controller: Solarflare SFC9140 [vmnic8]

0000:07:00.1 Ethernet controller Network controller: Solarflare SFC9140 [vmnic9]

0000:07:00.2 Ethernet controller Network controller: Solarflare SFC9140 [vmnic4]

0000:07:00.3 Ethernet controller Network controller: Solarflare SFC9140 [vmnic5]

0000:07:00.4 Ethernet controller Network controller: Solarflare SFC9140 [vmnic10]

0000:07:00.5 Ethernet controller Network controller: Solarflare SFC9140 [vmnic11]

0000:07:00.6 Ethernet controller Network controller: Solarflare SFC9140 [vmnic12]

0000:07:00.7 Ethernet controller Network controller: Solarflare SFC9140 [vmnic13]
In the above example a dual ‐ port adapter is partitioned to expose 4 PFs per physical
port.