[PATCH net-next v4 0/4] devlink: Introduce PCI PF, VF ports and attributes

[Parav Pandit <parav@mellanox.com>]

This patchset carry forwards the work initiated in [1] and discussion
futher concluded at [2].

To improve visibility of representor netdevice, its association with
PF or VF, physical port, two new devlink port flavours are added as
PCI PF and PCI VF ports.

A sample eswitch view can be seen below, which will be futher extended to
mdev subdevices of a PCI function in future.

Patch-1,2 extends devlink port attributes and port flavour.
Patch-3 extends mlx5 driver to register devlink ports for PF, VF and
physical link.

                                +---+      +---+
                              vf|   |      |   | pf
                                +-+-+      +-+-+
physical link <---------+         |          |
                        |         |          |
                        |         |          |
                      +-+-+     +-+-+      +-+-+
                      | 1 |     | 2 |      | 3 |
                   +--+---+-----+---+------+---+--+
                   |  physical   vf         pf    |
                   |  port       port       port  |
                   |                              |
                   |             eswitch          |
                   |                              |
                   +------------------------------+

[1] https://www.spinics.net/lists/netdev/msg555797.html
[2] https://marc.info/?l=linux-netdev&m=155354609408485&w=2

---
Changelog:
v3->v4:
 - Addressed comments from Jiri.
 - Split first patch to two patches.
 - Renamed phys_port to physical to be consistent with pci_pf.
 - Removed port_number from __devlink_port_attrs_set and moved
   assignment to caller function.
 - Used capital letter while moving old comment to new structure.
 - Removed helper function is_devlink_phy_port_num_supported().

v2->v3:
 - Made port_number and split_port_number applicable only to
   physical port flavours.
v1->v2:
 - Updated new APIs and mlx5 driver to drop port_number for PF, VF
   attributes
 - Updated port_number comment for its usage
 - Limited putting port_number to physical ports

Parav Pandit (4):
  devlink: Refactor physical port attributes
  devlink: Introduce PCI PF port flavour and port attribute
  devlink: Introduce PCI VF port flavour and port attribute
  net/mlx5e: Register devlink ports for physical link, PCI PF, VFs

 .../net/ethernet/mellanox/mlx5/core/en_rep.c  | 108 ++++++++++----
 .../net/ethernet/mellanox/mlx5/core/en_rep.h  |   1 +
 include/net/devlink.h                         |  31 +++-
 include/uapi/linux/devlink.h                  |  11 ++
 net/core/devlink.c                            | 135 +++++++++++++++---
 5 files changed, 233 insertions(+), 53 deletions(-)

-- 
2.19.2