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Solarflare Server Adapter User Guide
Solarflare Adapters on Linux
Issue 20 © Solarflare Communications 2017 97
Linux kernel versions prior to 2.6.20 support up to 16 MTD (flash) devices. Solarflare
adapters are equipped with 6 flash partitions. If more than two adapters are
deployed within a system a number of flash partitions will be inaccessible during
upgrade.
The limit was raised to 32 in Linux kernel version 2.6.20 and removed altogether in
2.6.35.
If issues are encountered during sfupdate, the user should consider one of the
following options when upgrading firmware on systems equipped with more than
two Solarflare adapters:
• Upgrade two adapters at a time with the other adapters removed.
• Upgrade the kernel.
• Rebuild the kernel, raising the value of
MAX_MTD_DEVICES
in include
/linux/
mtd/mtd.h
.
• Download an Sfutils bootable image from:
https://support.solarflare.com/index.php?id=1960&option=com_cognidox
Overcome Linux MTD Limitations
An alternative method is available to upgrade the firmware without removing the
adapters.
1 Unbind all interfaces from the drivers:
# for bdf in $(lspci ‐ D ‐ d 1924: | awk '{ print $1 }'); do \

echo ‐ n ${bdf}\ > /sys/bus/pci/devices/${bdf}/driver/unbind; done
2 Identify the bus/device/function for all Solarflare interfaces.
Using
ifconfig ‐ a
will not discover any Solarflare interfaces. Use
lspci
:
# lspci ‐ D ‐ d 1924:
Output similar to the following will be produced (5 NICs installed in this
example):
# lspci ‐ D ‐ d 1924:

0000:02:00.0 Ethernet controller: Solarflare Communications SFC9020 [Solarstorm]

0000:02:00.1 Ethernet controller: Solarflare Communications SFC9020 [Solarstorm]

0000:03:00.0 Ethernet controller: Solarflare Communications SFC9020 [Solarstorm]

0000:03:00.1 Ethernet controller: Solarflare Communications SFC9020 [Solarstorm]

0000:04:00.0 Ethernet controller: Solarflare Communications SFL9021 [Solarstorm]

0000:04:00.1 Ethernet controller: Solarflare Communications SFL9021 [Solarstorm]

0000:83:00.0 Ethernet controller: Solarflare Communications SFC9020 [Solarstorm]

0000:83:00.1 Ethernet controller: Solarflare Communications SFC9020 [Solarstorm]

0000:84:00.0 Ethernet controller: Solarflare Communications SFC9020 [Solarstorm]

0000:84:00.1 Ethernet controller: Solarflare Communications SFC9020 [Solarstorm]
3 There are enough resources to upgrade two NICs at a time, so re ‐ bind
interfaces in groups of four (2x2NICs):
# echo ‐ n "0000:02:00.0" > /sys/bus/pci/drivers/sfc/bind

# echo ‐ n "0000:02:00.1" > /sys/bus/pci/drivers/sfc/bind

# echo ‐ n "0000:03:00.0" > /sys/bus/pci/drivers/sfc/bind

# echo ‐ n "0000:03:00.1" > /sys/bus/pci/drivers/sfc/bind