[Intel-gfx] Add support for GuC-based SLPC

[Sagar Arun Kamble]

SLPC (Single Loop Power Controller) is a replacement for
some host-based power management features.  The SLPC
implementation runs in firmware on GuC.

This series has been tested with SKL GuC firmware
version 9.18 which is yet to be released. Performance and
power testing with these patches and 9.18 firmware is at
parity and in some cases better than host solution today
on various Linux benchmarks.

The graphics power management features in SLPC in this
version are called GTPERF, BALANCER, and DCC.

GTPERF is a combination of DFPS (Dynamic FPS) and Turbo.
DFPS adjusts requested graphics frequency to maintain
target framerate.  Turbo adjusts requested graphics
frequency to maintain target GT busyness; this includes
an adaptive boost turbo method.

BALANCER adjusts balance between power budgets for IA
and GT in power limited scenarios.  BALANCER is only
active when all display pipes are in "game" mode.

DCC (Duty Cycle Control) adjusts requested graphics
frequency and stalls guc-scheduler to maintain actual
graphics frequency in efficient range.

The last series can be found in the archive at
"[Intel-gfx] [PATCH v4 00/21] Add support for GuC-based SLPC"
https://lists.freedesktop.org/archives/intel-gfx/2016-April/094445.html

This series incorporates feedback from code reviews on earlier series.
It drops the display mode notification patches as it is not needed for
Turbo part of GTPERF. This series also adds new interface changes for
SLPC support on 9.18 GuC Firmware which is not yet published.
Will like to get review started prior to firmware is published.

With SLPC disabled by default, this series should be 
safe to merge now and it can be enabled when 9.18 firmware is released. 

v2: Addressed review comments on v1. Removed patch to enable SLPC by default.

VIZ-6773, VIZ-6889

Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter at intel.com>
Cc: Beuchat, Marc <marc.beuchat at intel.com>
Cc: Jeff McGee <jeff.mcgee at intel.com>


Sagar Arun Kamble (7):
  drm/i915: Remove RPM suspend dependency on rps.enabled and related
    changes
  drm/i915: Check GuC load status for Host to GuC action and SLPC status
  drm/i915: Mark GuC load status as PENDING in i915_drm_resume_early
  drm/i915/slpc: Only Enable GTPERF, Disable DCC, Balancer, IBC, FPS
    Stall
  drm/i915/slpc: Keep RP SW Mode enabled while disabling rps
  drm/i915: Add support for SKL/BXT 9.18 GuC Firmware for SLPC
  drm/i915/slpc: Update freq min/max softlimits

Tom O'Rourke (18):
  drm/i915/slpc: Expose guc functions for use with SLPC
  drm/i915/slpc: Add has_slpc capability flag
  drm/i915/slpc: Add SKL SLPC Support
  drm/i915/slpc: Add enable_slpc module parameter
  drm/i915/slpc: Sanitize SLPC version
  drm/i915/slpc: Use intel_slpc_* functions if supported
  drm/i915/slpc: Enable SLPC in guc if supported
  drm/i915/slpc: If using SLPC, do not set frequency
  drm/i915/slpc: Allocate/Release/Initialize SLPC shared data
  drm/i915/slpc: Add/Update interface for requested frequency
  drm/i915/slpc: Send reset event
  drm/i915/slpc: Send shutdown event
  drm/i915/slpc: Add slpc_status enum values
  drm/i915/slpc: Add parameter unset/set/get functions
  drm/i915/slpc: Add slpc support for max/min freq
  drm/i915/slpc: Add enable/disable debugfs for slpc
  drm/i915/slpc: Add i915_slpc_info to debugfs
  drm/i915/slpc: Add broxton support

 drivers/gpu/drm/i915/Makefile              |   3 +-
 drivers/gpu/drm/i915/i915_debugfs.c        | 469 +++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/i915_drv.c            |  21 +-
 drivers/gpu/drm/i915/i915_drv.h            |   2 +
 drivers/gpu/drm/i915/i915_guc_submission.c |  20 +-
 drivers/gpu/drm/i915/i915_params.c         |   6 +
 drivers/gpu/drm/i915/i915_params.h         |   1 +
 drivers/gpu/drm/i915/i915_pci.c            |   3 +
 drivers/gpu/drm/i915/i915_sysfs.c          |  51 ++++
 drivers/gpu/drm/i915/intel_drv.h           |  13 +
 drivers/gpu/drm/i915/intel_guc.h           |  11 +
 drivers/gpu/drm/i915/intel_guc_loader.c    |  49 ++-
 drivers/gpu/drm/i915/intel_pm.c            | 131 +++++---
 drivers/gpu/drm/i915/intel_runtime_pm.c    |   2 +-
 drivers/gpu/drm/i915/intel_slpc.c          | 368 ++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_slpc.h          | 215 +++++++++++++
 16 files changed, 1310 insertions(+), 55 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/intel_slpc.c
 create mode 100644 drivers/gpu/drm/i915/intel_slpc.h

-- 
1.9.1