This series enables Single Loop Power Control (SLPC) feature in GuC. GuC implements various power management algorithms as part of it's operation. These need to be specifically enabled by KMD. They replace the legacy host based management of these features.
With this series, we will enable two PM features - GTPerf and GuCRC. These are the Turbo and RC6 equivalents of the host based version. GuC provides various interfaces via host-to-guc messaging, which allows KMD to enable these features after GuC is loaded and GuC submission is enabled. We will specifically disable the IA/GT Balancer and Duty Cycle control features in SLPC.
To enable GTPerf, KMD sends a specific h2g message after setting up some shared data structures. As part of this, we will gate host RPS as well. GuC takes over the duties of requesting frequencies by monitoring GPU busyness. We can influence what GuC requests by modifying the min and max frequencies setup by SLPC through the sysfs interfaces that have been exposed by legacy Turbo. SLPC typically requests efficient frequency instead of minimum frequency to optimize performance. It also does not necessarily stick to platform max, and can request frequencies that are much higher since pcode will ultimately grant the appropriate values. However, we will force it to adhere to platform min and max values so as to maintain legacy behavior. SLPC does not have the concept of waitboost, so the boost_freq sysfs will show a '0' value for now. There is a patch forthcoming to ensure the interface is not exposed when SLPC is enabled.
GuCRC is enabled similarly through a h2g message. We still need to enable RC6 feature bit (GEN6_RC_CTL_RC6_ENABLE) before we send this out. Render/Media power gating still needs to be enabled by host as before. GuC will take care of setting up the hysterisis values for RC6, host does not need to set this up anymore.
v2: Address review comments (Michal W) v3: More comments, optimizations (Michal W) v4: Address comments (Michal W, Matt Roper, Matthew Brost) v5: Address checkpatch issues and some more comments
Signed-off-by: Vinay Belgaumkar vinay.belgaumkar@intel.com
Vinay Belgaumkar (14): drm/i915/guc/slpc: Initial definitions for SLPC drm/i915/guc/slpc: Gate Host RPS when SLPC is enabled drm/i915/guc/slpc: Adding SLPC communication interfaces drm/i915/guc/slpc: Allocate, initialize and release SLPC drm/i915/guc/slpc: Enable SLPC and add related H2G events drm/i915/guc/slpc: Remove BUG_ON in guc_submission_disable drm/i915/guc/slpc: Add methods to set min/max frequency drm/i915/guc/slpc: Add get max/min freq hooks drm/i915/guc/slpc: Add debugfs for SLPC info drm/i915/guc/slpc: Enable ARAT timer interrupt drm/i915/guc/slpc: Cache platform frequency limits drm/i915/guc/slpc: Sysfs hooks for SLPC drm/i915/guc/slpc: Add SLPC selftest drm/i915/guc/rc: Setup and enable GuCRC feature
drivers/gpu/drm/i915/Makefile | 2 + drivers/gpu/drm/i915/gt/intel_gt.c | 2 +- drivers/gpu/drm/i915/gt/intel_rc6.c | 47 +- drivers/gpu/drm/i915/gt/intel_rps.c | 201 ++++++ drivers/gpu/drm/i915/gt/intel_rps.h | 10 + drivers/gpu/drm/i915/gt/selftest_slpc.c | 314 +++++++++ .../gpu/drm/i915/gt/uc/abi/guc_actions_abi.h | 7 +- .../drm/i915/gt/uc/abi/guc_actions_slpc_abi.h | 235 +++++++ drivers/gpu/drm/i915/gt/uc/intel_guc.c | 17 + drivers/gpu/drm/i915/gt/uc/intel_guc.h | 4 + .../gpu/drm/i915/gt/uc/intel_guc_debugfs.c | 22 + drivers/gpu/drm/i915/gt/uc/intel_guc_fwif.h | 7 + drivers/gpu/drm/i915/gt/uc/intel_guc_rc.c | 80 +++ drivers/gpu/drm/i915/gt/uc/intel_guc_rc.h | 31 + drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 601 ++++++++++++++++++ drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h | 42 ++ .../gpu/drm/i915/gt/uc/intel_guc_slpc_types.h | 29 + .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 4 - drivers/gpu/drm/i915/gt/uc/intel_uc.c | 25 +- drivers/gpu/drm/i915/gt/uc/intel_uc.h | 4 + drivers/gpu/drm/i915/i915_pmu.c | 2 +- drivers/gpu/drm/i915/i915_reg.h | 5 + drivers/gpu/drm/i915/i915_sysfs.c | 83 +-- .../drm/i915/selftests/i915_live_selftests.h | 1 + 24 files changed, 1685 insertions(+), 90 deletions(-) create mode 100644 drivers/gpu/drm/i915/gt/selftest_slpc.c create mode 100644 drivers/gpu/drm/i915/gt/uc/abi/guc_actions_slpc_abi.h create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_rc.c create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_rc.h create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h create mode 100644 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h