Merge tag 'mlx5-updates-2019-05-31' of git://git.kernel.org/pub/scm/linux/kernel...

Saeed Mahameed says:

====================
mlx5-updates-2019-05-31

This series provides some updates to mlx5 core and netdevice driver.

1) use __netdev_tx_sent_queue() to improve performance under GSO workload

2) Allow matching only enc_key_id/enc_dst_port for decapsulation action

3) Geneve support:
This patchset adds support for GENEVE tunnel encap/decap flows offload:
encapsulating layer 2 Ethernet frames within layer 4 UDP datagrams.
The driver supports 6081 destination UDP port number, which is the
default IANA-assigned port.

Encap:
  ConnectX-5 inserts the header (w/ or w/o Geneve TLV options) that is
  provided by the mlx5 driver to the outgoing packet.

Decap:
  Geneve header is matched and the packet is decapsulated.
  Notes about decap flows with Geneve TLV Options:
   - Support offloading of 32-bit options data only
   - At any given time, only one combination of class/type parameters
     can be offloaded, but the same class/type combination can have
     many different flows offloaded with different 32-bit option data
   - Options with value of 0 can't be offloaded

Managing Geneve TLV options:
  Matching (on receive) is done by ConnectX-5 flex parser.
  Geneve TLV options are managed using General Object of type
  “Geneve TLV Options”.

  When the first flow with a certain class/type values is requested
  to be offloaded, the driver creates a FW object with FW command
  (Geneve TLV Options general object) and starts counting the number
  of flows using this object.

  During this time, any request with a different class/type values
  will fail to be offloaded.
  Once the refcount reaches 0, the driver destroys the TLV options
  general object, and can now offload a flow with any class/type parameters.

  Geneve TLV Options object is added to core device.
  It is currently used to manage Geneve TLV options general
  object allocation in FW and its reference counting only.

  In the future it will also be used for managing geneve ports
  by registering callbacks for ndo_udp_tunnel_add/del.

TC tunnel code refactoring:
  As a preparation for Geneve code, the TC tunnel code in mlx5
  was rearranged in a modular way, so that it would be easier
  to add future tunnels:
   - Defined tc tunnel object with the fields and callbacks that
     any tunnel must implement.
   - Define tc UDP tunnel object for UDP tunnels, such as VXLAN
   - Move each tunnel code (GRE, VXLAN) to its own separate file
   - Rewrite tc tunnel implementation in a general way – using
     only the objects and their callbacks.

4) Termination tables:
Actions in tables set with the termination flag are guaranteed to terminate
the action list. Thus, potential looping functionality (e.g. haripin) can safely be
executed without potential loops.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>