[Intel-wired-lan] [next-queue v2] i40e: Add support for a new feature: Total Port Shutdown

[Bowers, AndrewX]

-----Original Message-----
From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org> On Behalf Of Jeff Kirsher
Sent: Tuesday, April 7, 2020 11:03 AM
To: intel-wired-lan at lists.osuosl.org
Cc: Kwapulinski, Piotr <piotr.kwapulinski at intel.com>; Loktionov, Aleksandr <aleksandr.loktionov at intel.com>
Subject: [Intel-wired-lan] [next-queue v2] i40e: Add support for a new feature: Total Port Shutdown

From: Arkadiusz Kubalewski <arkadiusz.kubalewski at intel.com>

Currently after requesting to down a link on a physical network port, the traffic is no longer being processed but the physical link with a link partner is still established.

Total Port Shutdown allows to completely shutdown the port on the link-down procedure by physically removing the link from the port.

Introduced changes:
- probe NVM if the feature was enabled at initialization of the port
- special handling on link-down procedure to let FW physically shutdown the port if the feature was enabled

Testing Hints (required if no HSD):
Link up/down, link-down-on-close

Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski at intel.com>
Signed-off-by: Piotr Kwapulinski <piotr.kwapulinski at intel.com>
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov at intel.com>
---
v2: added missing define

 drivers/net/ethernet/intel/i40e/i40e.h        |   1 +
 .../net/ethernet/intel/i40e/i40e_adminq_cmd.h |   1 +
 .../net/ethernet/intel/i40e/i40e_ethtool.c    |   8 ++
 drivers/net/ethernet/intel/i40e/i40e_main.c   | 125 +++++++++++++++---
 4 files changed, 114 insertions(+), 21 deletions(-)

Tested-by: Andrew Bowers <andrewx.bowers at intel.com>