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Commit 1934f5de authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915: Assert we idle in the kernel context 



Now that we always switch to the kernel context upon idling, we can
make that assertion.

References: 4dfacb0b ("drm/i915: Switch to kernel context before idling at runtime")
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: default avatarMika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180531224057.6036-1-chris@chris-wilson.co.uk
parent ec92ad00

drivers/gpu/drm/i915/i915_gem.c

+18 −13
Original line number Diff line number Diff line
@@ -3498,6 +3498,22 @@ new_requests_since_last_retire(const struct drm_i915_private *i915) 
		work_pending(&i915->gt.idle_work.work));

}



static void assert_kernel_context_is_current(struct drm_i915_private *i915)

{

	struct intel_engine_cs *engine;

	enum intel_engine_id id;



	if (i915_terminally_wedged(&i915->gpu_error))

		return;



	GEM_BUG_ON(i915->gt.active_requests);

	for_each_engine(engine, i915, id) {

		GEM_BUG_ON(__i915_gem_active_peek(&engine->timeline.last_request));

		GEM_BUG_ON(engine->last_retired_context !=

			   to_intel_context(i915->kernel_context, engine));

	}

}



static void

i915_gem_idle_work_handler(struct work_struct *work)

{
@@ -3560,6 +3576,8 @@ i915_gem_idle_work_handler(struct work_struct *work) 


	epoch = __i915_gem_park(dev_priv);



	assert_kernel_context_is_current(dev_priv);



	rearm_hangcheck = false;

out_unlock:

	mutex_unlock(&dev_priv->drm.struct_mutex);
@@ -4944,19 +4962,6 @@ void __i915_gem_object_release_unless_active(struct drm_i915_gem_object *obj) 
		i915_gem_object_put(obj);

}



static void assert_kernel_context_is_current(struct drm_i915_private *i915)

{

	struct i915_gem_context *kctx = i915->kernel_context;

	struct intel_engine_cs *engine;

	enum intel_engine_id id;



	GEM_BUG_ON(i915->gt.active_requests);

	for_each_engine(engine, i915, id) {

		GEM_BUG_ON(__i915_gem_active_peek(&engine->timeline.last_request));

		GEM_BUG_ON(engine->last_retired_context->gem_context != kctx);

	}

}



void i915_gem_sanitize(struct drm_i915_private *i915)

{

	struct intel_engine_cs *engine;