Solarflare SFC9000 "Siena" 10 Gigabit Ethernet adapters
Solarflare's SFC9000-series 10 Gigabit Ethernet controllers, shipped on the SFN5000 and SFN6000 PCIe NIC families that were popular in low-latency finance and high-performance networking deployments from roughly 2010 through the late 2010s. Solarflare was acquired by Xilinx and then AMD, and the Siena generation was declared end-of-life in November 2021.
recommendation
Worth keeping but flagging as legacy hardware. The cards have been end-of-life since 2021 and AMD's current Solarflare lineup has moved on to newer chips, but the code was deliberately split out from the main sfc driver in Linux 5.19 precisely so the older silicon could continue to be supported on a lower-maintenance footing. Netdev traffic as recent as June 2025 shows the code still receiving compatibility updates, so removal would be premature, but its niche should be documented since the hardware is no longer sold new.
repository signals
sources
- cateee.net
CONFIG_SFC_SIENA builds module sfc-siena for Solarflare SFC9000 hardware, with PCI IDs 1924:0803 (SFC9020) and 1924:0813 (SFL9021).
- spinics.net
Netdev traffic in June 2025 still touched siena files as part of ongoing ethtool/RXFH API migration work, indicating upstream maintenance rather than removal.
- phoronix.com
The Siena split-out happened because SFN5000/SFN6000 SFC9000 hardware had been announced end-of-life in November 2021, with vendor testing reduced to a minimum.
- amd.com
AMD/Solarflare documentation states SolarCapture v1.6 does not support SFN5000 or SFN6000 series adapters, reinforcing that Siena-generation parts are legacy rather than current-platform targets.
- amd.com
Current AMD Solarflare adapter downloads are organized around newer adapter lines rather than SFN5000/SFN6000 Siena-era products, suggesting new deployments have moved to newer families.
codex reasoning notes (technical)
Local shell inspection (`rg`) confirms this is a real PCI NIC driver and identifies Siena as SFC9000-family support. Web search found LKDDb for exact hardware IDs/module name, a 2025 netdev archive page showing active siena-related maintenance, Phoronix coverage of the 2022 split noting vendor EOL/testing reduction, and AMD documentation pages showing Siena-era SFN5000/SFN6000 are legacy and absent from current product focus. That combination supports keep-annotate: old and no longer sold new, but still seeing upstream compatibility work, so deprecate/remove would be too aggressive.