[pull request][net-next 00/11] mlx5 External sub function controller

[Saeed Mahameed <saeed@kernel.org>]

From: Saeed Mahameed <saeedm@nvidia.com>

Hi Dave, Jakub,

This adds the support to instantiate Sub-Functions on external hosts
For more information please see tag log below.

Please pull and let me know if there is any problem.

Thanks,
Saeed.

---
The following changes since commit a926c025d56bb1acd8a192fca0e307331ee91b30:

  net: wwan: mhi_wwan_ctrl: Fix RX buffer starvation (2021-04-20 17:13:43 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux.git tags/mlx5-updates-2021-04-21

for you to fetch changes up to 88320da2bfa9f9acce8373d0713b054039802f61:

  net/mlx5: SF, Extend SF table for additional SF id range (2021-04-21 10:44:10 -0700)

----------------------------------------------------------------
mlx5-updates-2021-04-21

devlink external port attribute for SF (Sub-Function) port flavour

This adds the support to instantiate Sub-Functions on external hosts
E.g when Eswitch manager is enabled on the ARM SmarNic SoC CPU, users
are now able to spawn new Sub-Functions on the Host server CPU.

Parav Pandit Says:
==================

This series introduces and uses external attribute for the SF port to
indicate that a SF port belongs to an external controller.

This is needed to generate unique phys_port_name when PF and SF numbers
are overlapping between local and external controllers.
For example two controllers 0 and 1, both of these controller have a SF.
having PF number 0, SF number 77. Here, phys_port_name has duplicate
entry which doesn't have controller number in it.

Hence, add controller number optionally when a SF port is for an
external controller. This extension is similar to existing PF and VF
eswitch ports of the external controller.

When a SF is for external controller an example view of external SF
port and config sequence:

On eswitch system:
$ devlink dev eswitch set pci/0033:01:00.0 mode switchdev

$ devlink port show
pci/0033:01:00.0/196607: type eth netdev enP51p1s0f0np0 flavour physical port 0 splittable false
pci/0033:01:00.0/131072: type eth netdev eth0 flavour pcipf controller 1 pfnum 0 external true splittable false
  function:
    hw_addr 00:00:00:00:00:00

$ devlink port add pci/0033:01:00.0 flavour pcisf pfnum 0 sfnum 77 controller 1
pci/0033:01:00.0/163840: type eth netdev eth1 flavour pcisf controller 1 pfnum 0 sfnum 77 splittable false
  function:
    hw_addr 00:00:00:00:00:00 state inactive opstate detached

phys_port_name construction:
$ cat /sys/class/net/eth1/phys_port_name
c1pf0sf77

Patch summary:
First 3 patches prepares the eswitch to handle vports in more generic
way using xarray to lookup vport from its unique vport number.
Patch-1 returns maximum eswitch ports only when eswitch is enabled
Patch-2 prepares eswitch to return eswitch max ports from a struct
Patch-3 uses xarray for vport and representor lookup
Patch-4 considers SF for an additioanl range of SF vports
Patch-5 relies on SF hw table to check SF support
Patch-6 extends SF devlink port attribute for external flag
Patch-7 stores the per controller SF allocation attributes
Patch-8 uses SF function id for filtering events
Patch-9 uses helper for allocation and free
Patch-10 splits hw table into per controller table and generic one
Patch-11 extends sf table for additional range

==================

----------------------------------------------------------------
Parav Pandit (11):
      net/mlx5: E-Switch, Return eswitch max ports when eswitch is supported
      net/mlx5: E-Switch, Prepare to return total vports from eswitch struct
      net/mlx5: E-Switch, Use xarray for vport number to vport and rep mapping
      net/mlx5: E-Switch, Consider SF ports of host PF
      net/mlx5: SF, Rely on hw table for SF devlink port allocation
      devlink: Extend SF port attributes to have external attribute
      net/mlx5: SF, Store and use start function id
      net/mlx5: SF, Consider own vhca events of SF devices
      net/mlx5: SF, Use helpers for allocation and free
      net/mlx5: SF, Split mlx5_sf_hw_table into two parts
      net/mlx5: SF, Extend SF table for additional SF id range

 .../mellanox/mlx5/core/esw/acl/egress_lgcy.c       |   2 +-
 .../mellanox/mlx5/core/esw/acl/egress_ofld.c       |   4 +-
 .../ethernet/mellanox/mlx5/core/esw/acl/helper.c   |   8 +-
 .../ethernet/mellanox/mlx5/core/esw/acl/helper.h   |   2 +-
 .../mellanox/mlx5/core/esw/acl/ingress_lgcy.c      |   2 +-
 .../mellanox/mlx5/core/esw/acl/ingress_ofld.c      |   4 +-
 .../ethernet/mellanox/mlx5/core/esw/devlink_port.c |   7 +-
 .../net/ethernet/mellanox/mlx5/core/esw/legacy.c   |   3 +-
 drivers/net/ethernet/mellanox/mlx5/core/eswitch.c  | 276 +++++++++++++++----
 drivers/net/ethernet/mellanox/mlx5/core/eswitch.h  | 193 +++-----------
 .../ethernet/mellanox/mlx5/core/eswitch_offloads.c | 293 ++++++++++++++-------
 .../net/ethernet/mellanox/mlx5/core/sf/dev/dev.c   |  12 +-
 .../net/ethernet/mellanox/mlx5/core/sf/devlink.c   |  38 +--
 .../net/ethernet/mellanox/mlx5/core/sf/hw_table.c  | 256 +++++++++++++-----
 drivers/net/ethernet/mellanox/mlx5/core/sf/priv.h  |   9 +-
 drivers/net/ethernet/mellanox/mlx5/core/vport.c    |  14 -
 include/linux/mlx5/eswitch.h                       |  11 +-
 include/linux/mlx5/vport.h                         |   8 -
 include/net/devlink.h                              |   5 +-
 net/core/devlink.c                                 |  11 +-
 20 files changed, 724 insertions(+), 434 deletions(-)