drm/xe/pf: Allow change PF scheduling priority using sysfs

We have just added bulk change of the scheduling priority for all
VFs and PF, but that only allow to select LOW and NORMAL priority.

Add read-write attribute under PF to allow changing its priority
without impacting other VFs priority settings.

For completeness also add read-only attributes under VFs, to show
currently selected priority levels used by the VFs.

  /sys/bus/pci/drivers/xe/BDF/
  ├── sriov_admin/
      ├── pf/
      │   └── profile
      │       └── sched_priority	[RW] low, normal, high
      ├── vf1/
      │   └── profile
      │       └── sched_priority	[RO] low, normal

Writing "high" to the PF read-write attribute will change PF
priority on all tiles/GTs to HIGH (schedule function in the next
time-slice after current one completes and it has work). Writing
"low" or "normal" to change priority to LOW/NORMAL is supported.

When read, those files will display the current and available
scheduling priorities. The currently active priority level will
be enclosed in square brackets, default output will be like:

 $ grep . -h sriov_admin/{pf,vf1,vf2}/profile/sched_priority
 [low] normal high
 [low] normal
 [low] normal

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patch.msgid.link/20251030222348.186658-14-michal.wajdeczko@intel.com

0 files changed, 0 insertions, 0 deletions