ca7e599d45
Previously, there was a known issue "On Intel® 40G Ethernet
Controller stopping the port does not really down the port link."
There were two reasons why the port was always kept up.
1. Old firmware versions had issues when "Set PHY config command"
was used on 40G NICs.
2. The kernel i40e driver didn't call "Set PHY config command" when
ifconfig up/down was used, it assumes the link is always up. But
in DPDK, ports are forced down when an applications quits. So if
the port is then switched to being controlled by kernel the driver,
the port can not be brought up through "ifconfig <ethx> up".
This patch fixes this issue by adding in "Set PHY config command"
into our driver. This is now possible because with newer firmware
there is no longer a problem using this command.
With this fix, after DPDK quit, if the port is switched to being used
by the kernel driver, "ethtool -s <ethx> autoneg on" can be used to
turn on the auto negotiation, and then port can be brought up through
"ifconfig <ethx> up".
NOTE: requires kernel i40e driver version >= 1.4.X
Fixes: 2f1e22817420 ("i40e: skip link control as firmware workaround")
Fixes: 16c979f9adf2 ("i40e: disable setting of PHY configuration")
Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
DPDK is a set of libraries and drivers for fast packet processing. It supports many processor architectures and both FreeBSD and Linux. The DPDK uses the Open Source BSD license for the core libraries and drivers. The kernel components are GPLv2 licensed. Please check the doc directory for release notes, API documentation, and sample application information. For questions and usage discussions, subscribe to: users@dpdk.org Report bugs and issues to the development mailing list: dev@dpdk.org