From c4fd7d8cc3caa614ab492e0efc8854328f72b719 Mon Sep 17 00:00:00 2001 From: Matthew Brost Date: Thu, 17 Jun 2021 18:06:33 -0700 Subject: [PATCH] drm/i915: Reset sched_engine.no_priolist immediately after dequeue Rather than touching schedule state in the generic PM code, reset the priolist allocation when empty in the submission code. Add a wrapper function to do this and update the backends to call it in the correct place. v3: (Jason Ekstrand) Update patch commit message with a better description Signed-off-by: Matthew Brost Reviewed-by: Jason Ekstrand Signed-off-by: Matt Roper Link: https://patchwork.freedesktop.org/patch/msgid/20210618010638.98941-4-matthew.brost@intel.com --- drivers/gpu/drm/i915/gt/intel_engine_pm.c | 2 -- drivers/gpu/drm/i915/gt/intel_execlists_submission.c | 1 + drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 2 ++ drivers/gpu/drm/i915/i915_scheduler.h | 7 +++++++ 4 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c index b6a00dd..1f07ac4 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c +++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c @@ -280,8 +280,6 @@ static int __engine_park(struct intel_wakeref *wf) if (engine->park) engine->park(engine); - engine->sched_engine->no_priolist = false; - /* While gt calls i915_vma_parked(), we have to break the lock cycle */ intel_gt_pm_put_async(engine->gt); return 0; diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c index e36b0e8..47a43aa 100644 --- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c +++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c @@ -1553,6 +1553,7 @@ done: * interrupt for secondary ports). */ sched_engine->queue_priority_hint = queue_prio(sched_engine); + i915_sched_engine_reset_on_empty(sched_engine); spin_unlock(&engine->active.lock); /* diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c index d65a766..9887a51 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c @@ -263,6 +263,8 @@ static void guc_submission_tasklet(struct tasklet_struct *t) __guc_dequeue(engine); + i915_sched_engine_reset_on_empty(engine->sched_engine); + spin_unlock_irqrestore(&engine->active.lock, flags); } diff --git a/drivers/gpu/drm/i915/i915_scheduler.h b/drivers/gpu/drm/i915/i915_scheduler.h index 5bec7b3..713c38c 100644 --- a/drivers/gpu/drm/i915/i915_scheduler.h +++ b/drivers/gpu/drm/i915/i915_scheduler.h @@ -72,6 +72,13 @@ i915_sched_engine_is_empty(struct i915_sched_engine *sched_engine) return RB_EMPTY_ROOT(&sched_engine->queue.rb_root); } +static inline void +i915_sched_engine_reset_on_empty(struct i915_sched_engine *sched_engine) +{ + if (i915_sched_engine_is_empty(sched_engine)) + sched_engine->no_priolist = false; +} + void i915_request_show_with_schedule(struct drm_printer *m, const struct i915_request *rq, const char *prefix, -- 2.7.4