drm/i915/gt: Merge engine init/setup loops

Now that we don't need to create GEM contexts in the middle of engine
construction, we can pull the engine init/setup loops together.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Andi Shyti <andi.shyti@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191222144046.1674865-2-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/gt/intel_engine.h

@@ -184,7 +184,6 @@ void intel_engine_stop(struct intel_engine_cs *engine);
 void intel_engine_cleanup(struct intel_engine_cs *engine);
 
 int intel_engines_init_mmio(struct intel_gt *gt);
-int intel_engines_setup(struct intel_gt *gt);
 int intel_engines_init(struct intel_gt *gt);
 
 void intel_engines_release(struct intel_gt *gt);
@@ -194,7 +193,6 @@ int intel_engine_init_common(struct intel_engine_cs *engine);
 void intel_engine_cleanup_common(struct intel_engine_cs *engine);
 
 int intel_ring_submission_setup(struct intel_engine_cs *engine);
-int intel_ring_submission_init(struct intel_engine_cs *engine);
 
 int intel_engine_stop_cs(struct intel_engine_cs *engine);
 void intel_engine_cancel_stop_cs(struct intel_engine_cs *engine);

drivers/gpu/drm/i915/gt/intel_engine_cs.c

@@ -471,39 +471,6 @@ int intel_engines_init_mmio(struct intel_gt *gt)
 	return err;
 }
 
-/**
- * intel_engines_init() - init the Engine Command Streamers
- * @gt: pointer to struct intel_gt
- *
- * Return: non-zero if the initialization failed.
- */
-int intel_engines_init(struct intel_gt *gt)
-{
-	int (*init)(struct intel_engine_cs *engine);
-	struct intel_engine_cs *engine;
-	enum intel_engine_id id;
-	int err;
-
-	if (HAS_EXECLISTS(gt->i915))
-		init = intel_execlists_submission_init;
-	else
-		init = intel_ring_submission_init;
-
-	for_each_engine(engine, gt, id) {
-		err = init(engine);
-		if (err)
-			goto cleanup;
-
-		intel_engine_add_user(engine);
-	}
-
-	return 0;
-
-cleanup:
-	intel_engines_release(gt);
-	return err;
-}
-
 void intel_engine_init_execlists(struct intel_engine_cs *engine)
 {
 	struct intel_engine_execlists * const execlists = &engine->execlists;
@@ -615,7 +582,7 @@ static int init_status_page(struct intel_engine_cs *engine)
 	return ret;
 }
 
-static int intel_engine_setup_common(struct intel_engine_cs *engine)
+static int engine_setup_common(struct intel_engine_cs *engine)
 {
 	int err;
 
@@ -645,46 +612,6 @@ static int intel_engine_setup_common(struct intel_engine_cs *engine)
 	return 0;
 }
 
-/**
- * intel_engines_setup- setup engine state not requiring hw access
- * @gt: pointer to struct intel_gt
- *
- * Initializes engine structure members shared between legacy and execlists
- * submission modes which do not require hardware access.
- *
- * Typically done early in the submission mode specific engine setup stage.
- */
-int intel_engines_setup(struct intel_gt *gt)
-{
-	int (*setup)(struct intel_engine_cs *engine);
-	struct intel_engine_cs *engine;
-	enum intel_engine_id id;
-	int err;
-
-	if (HAS_EXECLISTS(gt->i915))
-		setup = intel_execlists_submission_setup;
-	else
-		setup = intel_ring_submission_setup;
-
-	for_each_engine(engine, gt, id) {
-		err = intel_engine_setup_common(engine);
-		if (err)
-			goto cleanup;
-
-		err = setup(engine);
-		if (err)
-			goto cleanup;
-
-		GEM_BUG_ON(!engine->cops);
-	}
-
-	return 0;
-
-cleanup:
-	intel_engines_release(gt);
-	return err;
-}
-
 struct measure_breadcrumb {
 	struct i915_request rq;
 	struct intel_timeline timeline;
@@ -802,7 +729,7 @@ create_kernel_context(struct intel_engine_cs *engine)
  *
  * Returns zero on success or an error code on failure.
  */
-int intel_engine_init_common(struct intel_engine_cs *engine)
+static int engine_init_common(struct intel_engine_cs *engine)
 {
 	struct intel_context *ce;
 	int ret;
@@ -832,6 +759,37 @@ int intel_engine_init_common(struct intel_engine_cs *engine)
 	return 0;
 }
 
+int intel_engines_init(struct intel_gt *gt)
+{
+	int (*setup)(struct intel_engine_cs *engine);
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+	int err;
+
+	if (HAS_EXECLISTS(gt->i915))
+		setup = intel_execlists_submission_setup;
+	else
+		setup = intel_ring_submission_setup;
+
+	for_each_engine(engine, gt, id) {
+		err = engine_setup_common(engine);
+		if (err)
+			return err;
+
+		err = setup(engine);
+		if (err)
+			return err;
+
+		err = engine_init_common(engine);
+		if (err)
+			return err;
+
+		intel_engine_add_user(engine);
+	}
+
+	return 0;
+}
+
 /**
  * intel_engines_cleanup_common - cleans up the engine state created by
  *                                the common initiailizers.

drivers/gpu/drm/i915/gt/intel_gt.c

@@ -584,10 +584,6 @@ int intel_gt_init(struct intel_gt *gt)
 		goto err_pm;
 	}
 
-	err = intel_engines_setup(gt);
-	if (err)
-		goto err_vm;
-
 	err = intel_engines_init(gt);
 	if (err)
 		goto err_engines;
@@ -618,7 +614,6 @@ int intel_gt_init(struct intel_gt *gt)
 	intel_uc_fini(&gt->uc);
 err_engines:
 	intel_engines_release(gt);
-err_vm:
 	i915_vm_put(fetch_and_zero(&gt->vm));
 err_pm:
 	intel_gt_pm_fini(gt);

drivers/gpu/drm/i915/gt/intel_lrc.c

@@ -3863,6 +3863,11 @@ static void rcs_submission_override(struct intel_engine_cs *engine)
 
 int intel_execlists_submission_setup(struct intel_engine_cs *engine)
 {
+	struct intel_engine_execlists * const execlists = &engine->execlists;
+	struct drm_i915_private *i915 = engine->i915;
+	struct intel_uncore *uncore = engine->uncore;
+	u32 base = engine->mmio_base;
+
 	tasklet_init(&engine->execlists.tasklet,
 		     execlists_submission_tasklet, (unsigned long)engine);
 	timer_setup(&engine->execlists.timer, execlists_timeslice, 0);
@@ -3874,21 +3879,6 @@ int intel_execlists_submission_setup(struct intel_engine_cs *engine)
 	if (engine->class == RENDER_CLASS)
 		rcs_submission_override(engine);
 
-	return 0;
-}
-
-int intel_execlists_submission_init(struct intel_engine_cs *engine)
-{
-	struct intel_engine_execlists * const execlists = &engine->execlists;
-	struct drm_i915_private *i915 = engine->i915;
-	struct intel_uncore *uncore = engine->uncore;
-	u32 base = engine->mmio_base;
-	int ret;
-
-	ret = intel_engine_init_common(engine);
-	if (ret)
-		return ret;
-
 	if (intel_init_workaround_bb(engine))
 		/*
 		 * We continue even if we fail to initialize WA batch

drivers/gpu/drm/i915/gt/intel_lrc.h

@@ -83,7 +83,6 @@ enum {
 void intel_logical_ring_cleanup(struct intel_engine_cs *engine);
 
 int intel_execlists_submission_setup(struct intel_engine_cs *engine);
-int intel_execlists_submission_init(struct intel_engine_cs *engine);
 
 /* Logical Ring Contexts */
 /* At the start of the context image is its per-process HWS page */

drivers/gpu/drm/i915/gt/intel_ring_submission.c

@@ -1958,6 +1958,10 @@ static void setup_vecs(struct intel_engine_cs *engine)
 
 int intel_ring_submission_setup(struct intel_engine_cs *engine)
 {
+	struct intel_timeline *timeline;
+	struct intel_ring *ring;
+	int err;
+
 	setup_common(engine);
 
 	switch (engine->class) {
@@ -1978,15 +1982,6 @@ int intel_ring_submission_setup(struct intel_engine_cs *engine)
 		return -ENODEV;
 	}
 
-	return 0;
-}
-
-int intel_ring_submission_init(struct intel_engine_cs *engine)
-{
-	struct intel_timeline *timeline;
-	struct intel_ring *ring;
-	int err;
-
 	timeline = intel_timeline_create(engine->gt, engine->status_page.vma);
 	if (IS_ERR(timeline)) {
 		err = PTR_ERR(timeline);
@@ -2012,16 +2007,10 @@ int intel_ring_submission_init(struct intel_engine_cs *engine)
 	engine->legacy.ring = ring;
 	engine->legacy.timeline = timeline;
 
-	err = intel_engine_init_common(engine);
-	if (err)
-		goto err_ring_unpin;
-
 	GEM_BUG_ON(timeline->hwsp_ggtt != engine->status_page.vma);
 
 	return 0;
 
-err_ring_unpin:
-	intel_ring_unpin(ring);
 err_ring:
 	intel_ring_put(ring);
 err_timeline_unpin: