i915/pmu: Move execlist stats initialization to execlist specific setup

engine->stats is a union of execlist and guc stat objects. When execlist
specific fields are initialized, the initial state of guc stats is
affected. This results in bad busyness values when using GuC mode. Move
the execlist initialization from common code to execlist specific code.

Fixes: 77cdd054dd2c ("drm/i915/pmu: Connect engine busyness stats from GuC to pmu")
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Alan Previn <alan.previn.teres.alexis@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230912212247.1828681-1-umesh.nerlige.ramappa@intel.com
(cherry picked from commit 4485bd519f5d6d620a29d0547ff3c982bdeeb468)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index ee15486fed0daa57479b07da01e2b7c3ea78391b..e85d70a62123f9bbd824c9df1542dd7ecf9c7b62 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -558,7 +558,6 @@ static int intel_engine_setup(struct intel_gt *gt, enum intel_engine_id id,
                DRIVER_CAPS(i915)->has_logical_contexts = true;
 
        ewma__engine_latency_init(&engine->latency);
-       seqcount_init(&engine->stats.execlists.lock);
 
        ATOMIC_INIT_NOTIFIER_HEAD(&engine->context_status_notifier);
 

diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index 8a641bcf777cb4da2c211911a470272d759314a4..3292524469d509655db5a7130a07c744af440bb3 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -3550,6 +3550,8 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine)
        logical_ring_default_vfuncs(engine);
        logical_ring_default_irqs(engine);
 
+       seqcount_init(&engine->stats.execlists.lock);
+
        if (engine->flags & I915_ENGINE_HAS_RCS_REG_STATE)
                rcs_submission_override(engine);