linux-stable.git/drivers/net/ethernet/intel/ixd, branch master

ixd: add devlink support

2026-08-12T20:56:51+00:00

Enable initial support for the devlink interface with the ixd driver. The
ixd hardware is a single function PCIe device. So, the PCIe adapter gets
its own devlink instance to manage device-wide resources or configuration.

$ devlink dev show
pci/0000:83:00.6

$ devlink dev info pci/0000:83:00.6
pci/0000:83:00.6:
  driver ixd
  serial_number 00-a0-c9-ff-ff-23-45-67
  versions:
      fixed:
        device.type MEV
      running:
        fw.mgmt.api 2.0

Signed-off-by: Amritha Nambiar 
Reviewed-by: Michal Swiatkowski 
Reviewed-by: Maciej Fijalkowski 
Reviewed-by: Przemek Kitszel 
Tested-by: Bharath R 
Signed-off-by: Larysa Zaremba 
Signed-off-by: Tony Nguyen

ixd: add the core initialization

2026-08-12T20:56:51+00:00

As the mailbox is setup, initialize the core. This makes use of the send
and receive mailbox message framework for virtchnl communication between
the driver and device Control Plane (CP).

To start with, driver confirms the virtchnl version with the CP. Once that
is done, it requests and gets the required capabilities and resources
needed such as max vectors, queues, vports etc.

Use a unified way of handling the virtchnl messages, where a single
function handles all related memory management and the caller only provides
the callbacks to fill the send buffer and to handle the response.

Place generic control queue message handling separately to facilitate the
addition of protocols other than virtchannel in the future.

Co-developed-by: Amritha Nambiar 
Signed-off-by: Amritha Nambiar 
Reviewed-by: Maciej Fijalkowski 
Tested-by: Bharath R 
Signed-off-by: Larysa Zaremba 
Signed-off-by: Tony Nguyen

ixd: add reset checks and initialize the mailbox

2026-08-12T20:56:51+00:00

At the end of the probe, trigger hard reset, initialize and schedule the
after-reset task. If the reset is complete in a pre-determined time,
initialize the default mailbox, through which other resources will be
negotiated.

Co-developed-by: Amritha Nambiar 
Signed-off-by: Amritha Nambiar 
Reviewed-by: Maciej Fijalkowski 
Reviewed-by: Aleksandr Loktionov 
Tested-by: Bharath R 
Signed-off-by: Larysa Zaremba 
Signed-off-by: Tony Nguyen

ixd: add basic driver framework for Intel(R) Control Plane Function

2026-08-12T20:56:51+00:00

Add module register and probe functionality. Add the required support to
register IXD PCI driver, as well as probe, remove and shutdown callbacks.
Enable the PCI device and request to reserve the memory resources that will
be used by the driver. Finally map the BAR0 address space.

For now, use devm_kzalloc() to allocate adapter, as it requires the least
amount of code. In a later commit, it will be replaced with a devlink
alternative.

Co-developed-by: Amritha Nambiar 
Signed-off-by: Amritha Nambiar 
Reviewed-by: Maciej Fijalkowski 
Tested-by: Bharath R 
Signed-off-by: Larysa Zaremba 
Signed-off-by: Tony Nguyen