-----Original Message-----
From: Intel-wired-lan <redacted> On Behalf Of
Jedrzej Jagielski
Sent: Thursday, August 28, 2025 11:52 AM
To: intel-wired-lan@lists.osuosl.org
Cc: Nguyen, Anthony L <anthony.l.nguyen@intel.com>;
netdev@vger.kernel.org; stable@vger.kernel.org; Jagielski, Jedrzej
[off-list ref]; Kitszel, Przemyslaw
[off-list ref]; Loktionov, Aleksandr
[off-list ref]
Subject: [Intel-wired-lan] [PATCH iwl-net v1 1/4] ixgbevf: fix getting link speed
data for E610 devices

E610 adapters no longer use the VFLINKS register to read PF's link speed and
linkup state. As a result VF driver cannot get actual link state and it incorrectly
reports 10G which is the default option.
It leads to a situation where even 1G adapters print 10G as actual link speed.
The same happens when PF driver set speed different than 10G.

Add new mailbox operation to let the VF driver request a PF driver to provide
actual link data. Update the mailbox api to v1.6.

Incorporate both ways of getting link status within the legacy
ixgbe_check_mac_link_vf() function.

Fixes: 4c44b450c69b ("ixgbevf: Add support for Intel(R) E610 device")
Co-developed-by: Andrzej Wilczynski <redacted>
Signed-off-by: Andrzej Wilczynski <redacted>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Aleksandr Loktionov <redacted>
Cc: stable@vger.kernel.org
Signed-off-by: Jedrzej Jagielski <redacted>
---
 drivers/net/ethernet/intel/ixgbevf/defines.h  |   1 +
 .../net/ethernet/intel/ixgbevf/ixgbevf_main.c |   6 +-
 drivers/net/ethernet/intel/ixgbevf/mbx.h      |   4 +
 drivers/net/ethernet/intel/ixgbevf/vf.c       | 137 ++++++++++++++----
 4 files changed, 116 insertions(+), 32 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbevf/defines.h

b/drivers/net/ethernet/intel/ixgbevf/defines.h
index a9bc96f6399d..e177d1d58696 100644

--- a/drivers/net/ethernet/intel/ixgbevf/defines.h
+++ b/drivers/net/ethernet/intel/ixgbevf/defines.h

@@ -28,6 +28,7 @@