The preemption request and timeout is used for
higher priority context or kill hung context and reset
hardware engine.

The preempt timeout can be adjusted per-engine class using,

/sys/class/drm/cardX/device/tileN/gtN/engines/ccs/preempt_timeout_us

and can be disabled by setting it to 0.

V7:
  - Rebase
V6:
  - Rebase to use s/xe_engine/xe_hw_engine/ - Matt
V5:
  - Remove timeout validation, not relevant - Niranjana
V4:
  - Rebase to replace hw engine with eclass interface
V3:
  - Rebase to per class engine props interface
V2:
  - Rebase
  - Update commit message to add tile
Reviewed-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>