Wed, Feb 19, 2025 at 05:32:54PM +0100, przemyslaw.kits...@intel.com wrote: >Add a support for whole device devlink instance. Intented as a entity >over all PF devices on given physical device. > >In case of ice driver we have multiple PF devices (with their devlink >dev representation), that have separate drivers loaded. However those >still do share lots of resources due to being the on same HW. Examples >include PTP clock and RSS LUT. Historically such stuff was assigned to >PF0, but that was both not clear and not working well. Now such stuff >is moved to be covered into struct ice_adapter, there is just one instance >of such per HW. > >This patch adds a devlink instance that corresponds to that ice_adapter, >to allow arbitrage over resources (as RSS LUT) via it (further in the >series (RFC NOTE: stripped out so far)). > >Thanks to Wojciech Drewek for very nice naming of the devlink instance: >PF0: pci/0000:00:18.0 >whole-dev: pci/0000:00:18 >But I made this a param for now (driver is free to pass just "whole-dev"). > >$ devlink dev # (Interesting part of output only) >pci/0000:af:00: > nested_devlink: > pci/0000:af:00.0 > pci/0000:af:00.1 > pci/0000:af:00.2 > pci/0000:af:00.3 > pci/0000:af:00.4 > pci/0000:af:00.5 > pci/0000:af:00.6 > pci/0000:af:00.7
Please check my RFC attempt to solve this for mlx5: https://lore.kernel.org/all/20250318124706.94156-1-j...@resnulli.us/ I believe that the same could work for you too.
