Merge tag 'mlx5-updates-2023-06-09' of git://git.kernel.org/pub/scm/linux/kernel...

mlx5-updates-2023-06-09

1) Embedded CPU Virtual Functions
2) Lightweight local SFs

Daniel Jurgens says:
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Embedded CPU Virtual Functions

This series enables the creation of virtual functions on Bluefield (the
embedded CPU platform). Embedded CPU virtual functions (EC VFs). EC VF
creation, deletion and management interfaces are the same as those for
virtual functions in a server with a Connect-X NIC.

When using EC VFs on the ARM the creation of virtual functions on the
host system is still supported. Host VFs eswitch vports occupy a range
of 1..max_vfs, the EC VF vport range is max_vfs+1..max_ec_vfs.

Every function (PF, ECPF, VF, EC VF, and subfunction) has a function ID
associated with it. Prior to this series the function ID and the eswitch
vport were the same. That is no longer the case, the EC VF function ID
range is 1..max_ec_vfs. When querying or setting the capabilities of an
EC VF function an new bit must be set in the query/set HCA cap
structure.

This is a high level overview of the changes made:
	- Allocate vports for EC VFs if they are enabled.
	- Create representors and devlink ports for the EC VF vports.
	- When querying/setting HCA caps by vport break the assumption
	  that function ID is the same a vport number and adjust
	  accordingly.
	- Create a new type of page, so that when SRIOV on the ARM is
	  disabled, but remains enabled on the host, the driver can
	  wait for the correct pages.
	- Update SRIOV code to support EC VF creation/deletion.

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Lightweight local SFs:

Last 3 patches form Shay Drory:

SFs are heavy weight and by default they come with the full package of
ConnectX features. Usually users want specialized SFs for one specific
purpose and using devlink users will almost always override the set of
advertises features of an SF and reload it.

Shay Drory says:
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In order to avoid the wasted time and resources on the reload, local SFs
will probe without any auxiliary sub-device, so that the SFs can be
configured prior to its full probe.

The defaults of the enable_* devlink params of these SFs are set to
false.

Usage example:
Create SF:
$ devlink port add pci/0000:08:00.0 flavour pcisf pfnum 0 sfnum 11
$ devlink port function set pci/0000:08:00.0/32768 \
               hw_addr 00:00:00:00:00:11 state active

Enable ETH auxiliary device:
$ devlink dev param set auxiliary/mlx5_core.sf.1 \
              name enable_eth value true cmode driverinit

Now, in order to fully probe the SF, use devlink reload:
$ devlink dev reload auxiliary/mlx5_core.sf.1

At this point the user have SF devlink instance with auxiliary device
for the Ethernet functionality only.

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