[0/3] drm/i915/guc/slpc: Implement waitboost for SLPC

Message

Vinay Belgaumkar Oct. 20, 2021, 7:52 p.m. UTC

Waitboost is a legacy feature implemented in the Host Turbo algorithm. This
patch set implements it for the SLPC path. A "boost" happens when user
calls gem_wait ioctl on a submission that has not landed on HW yet. GT
frequency gets temporarily bumped to RP0 to allow the previous request
to finish quickly. We achieve this on SLPC by setting the min frequency,
SLPC will set that as the requested frequency.

Like before, boost frequency is configurable through sysfs, so we can
adjust it to any specific value as long as it is between [min, RP0].

Signed-off-by: Vinay Belgaumkar <[e-mail]>

Vinay Belgaumkar (3):
  drm/i915/guc/slpc: Define and initialize boost frequency
  drm/i915/guc/slpc: Add waitboost functionality for SLPC
  drm/i915/guc/slpc: Update boost sysfs hooks for SLPC

 drivers/gpu/drm/i915/gt/intel_rps.c           | 57 +++++++++++++++++++
 drivers/gpu/drm/i915/gt/intel_rps.h           |  3 +
 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c   | 56 ++++++++++++++++++
 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h   |  3 +
 .../gpu/drm/i915/gt/uc/intel_guc_slpc_types.h |  3 +
 drivers/gpu/drm/i915/i915_request.c           |  2 +-
 drivers/gpu/drm/i915/i915_sysfs.c             | 21 ++-----
 7 files changed, 127 insertions(+), 18 deletions(-)