[PATCH] drm/i915/execlists: Refactor common engine setup

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Move all of the constant assignments up front and into a common
function. This is primarily to ensure the backpointers are set as early
as possible for later use during initialisation.

Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>
---

I'm not too happy about using the function parameters with lots of
similar types, very easy to muddle them up. I'm sending this all because
it places one initialiser in a common location rather than per-engine!
-Chris

---
 drivers/gpu/drm/i915/intel_lrc.c | 157 +++++++++++++++++++--------------------
 1 file changed, 78 insertions(+), 79 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 874c2515f9d4..a4a4f8eaf000 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1921,8 +1921,7 @@ void intel_logical_ring_cleanup(struct intel_engine_cs *engine)
 }
 
 static void
-logical_ring_default_vfuncs(struct drm_device *dev,
-			    struct intel_engine_cs *engine)
+logical_ring_default_vfuncs(struct intel_engine_cs *engine)
 {
 	/* Default vfuncs which can be overriden by each engine. */
 	engine->init_hw = gen8_init_common_ring;
@@ -1933,7 +1932,7 @@ logical_ring_default_vfuncs(struct drm_device *dev,
 	engine->emit_bb_start = gen8_emit_bb_start;
 	engine->get_seqno = gen8_get_seqno;
 	engine->set_seqno = gen8_set_seqno;
-	if (IS_BXT_REVID(dev, 0, BXT_REVID_A1)) {
+	if (IS_BXT_REVID(engine->dev, 0, BXT_REVID_A1)) {
 		engine->irq_seqno_barrier = bxt_a_seqno_barrier;
 		engine->set_seqno = bxt_a_set_seqno;
 	}
@@ -1944,6 +1943,7 @@ logical_ring_default_irqs(struct intel_engine_cs *engine, unsigned shift)
 {
 	engine->irq_enable_mask = GT_RENDER_USER_INTERRUPT << shift;
 	engine->irq_keep_mask = GT_CONTEXT_SWITCH_INTERRUPT << shift;
+	init_waitqueue_head(&engine->irq_queue);
 }
 
 static int
@@ -1964,31 +1964,28 @@ lrc_setup_hws(struct intel_engine_cs *engine,
 	return 0;
 }
 
-static int
-logical_ring_init(struct drm_device *dev, struct intel_engine_cs *engine)
+static struct intel_engine_cs *
+logical_ring_setup(struct drm_device *dev, int id,
+		   const char *name,
+		   unsigned exec_id,
+		   unsigned guc_id,
+		   unsigned mmio_base,
+		   unsigned irq)
 {
 	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct intel_context *dctx = dev_priv->kernel_context;
+	struct intel_engine_cs *engine = &dev_priv->engine[id];
 	enum forcewake_domains fw_domains;
-	int ret;
-
-	/* Intentionally left blank. */
-	engine->buffer = NULL;
 
 	engine->dev = dev;
-	INIT_LIST_HEAD(&engine->active_list);
-	INIT_LIST_HEAD(&engine->request_list);
-	i915_gem_batch_pool_init(dev, &engine->batch_pool);
-	init_waitqueue_head(&engine->irq_queue);
-
-	INIT_LIST_HEAD(&engine->buffers);
-	INIT_LIST_HEAD(&engine->execlist_queue);
-	spin_lock_init(&engine->execlist_lock);
 
-	tasklet_init(&engine->irq_tasklet,
-		     intel_lrc_irq_handler, (unsigned long)engine);
+	engine->name = name,
+	engine->id = id;
+	engine->exec_id = exec_id;
+	engine->guc_id = guc_id;
+	engine->mmio_base = mmio_base;
 
-	logical_ring_init_platform_invariants(engine);
+	/* Intentionally left blank. */
+	engine->buffer = NULL;
 
 	fw_domains = intel_uncore_forcewake_for_reg(dev_priv,
 						    RING_ELSP(engine),
@@ -2004,6 +2001,31 @@ logical_ring_init(struct drm_device *dev, struct intel_engine_cs *engine)
 
 	engine->fw_domains = fw_domains;
 
+	INIT_LIST_HEAD(&engine->active_list);
+	INIT_LIST_HEAD(&engine->request_list);
+	INIT_LIST_HEAD(&engine->buffers);
+	INIT_LIST_HEAD(&engine->execlist_queue);
+	spin_lock_init(&engine->execlist_lock);
+
+	tasklet_init(&engine->irq_tasklet,
+		     intel_lrc_irq_handler, (unsigned long)engine);
+
+	logical_ring_init_platform_invariants(engine);
+	logical_ring_default_vfuncs(engine);
+	logical_ring_default_irqs(engine, irq);
+
+	intel_engine_init_hangcheck(engine);
+	i915_gem_batch_pool_init(engine->dev, &engine->batch_pool);
+
+	return engine;
+}
+
+static int
+logical_ring_init(struct intel_engine_cs *engine)
+{
+	struct intel_context *dctx = to_i915(engine->dev)->kernel_context;
+	int ret;
+
 	ret = i915_cmd_parser_init_ring(engine);
 	if (ret)
 		goto error;
@@ -2036,22 +2058,17 @@ error:
 
 static int logical_render_ring_init(struct drm_device *dev)
 {
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_engine_cs *engine = &dev_priv->engine[RCS];
+	struct intel_engine_cs *engine;
 	int ret;
 
-	engine->name = "render ring";
-	engine->id = RCS;
-	engine->exec_id = I915_EXEC_RENDER;
-	engine->guc_id = GUC_RENDER_ENGINE;
-	engine->mmio_base = RENDER_RING_BASE;
-
-	logical_ring_default_irqs(engine, GEN8_RCS_IRQ_SHIFT);
+	engine = logical_ring_setup(dev, RCS, "render ring",
+				    I915_EXEC_RENDER,
+				    GUC_RENDER_ENGINE,
+				    RENDER_RING_BASE,
+				    GEN8_RCS_IRQ_SHIFT);
 	if (HAS_L3_DPF(dev))
 		engine->irq_keep_mask |= GT_RENDER_L3_PARITY_ERROR_INTERRUPT;
 
-	logical_ring_default_vfuncs(dev, engine);
-
 	/* Override some for render ring. */
 	if (INTEL_INFO(dev)->gen >= 9)
 		engine->init_hw = gen9_init_render_ring;
@@ -2062,8 +2079,6 @@ static int logical_render_ring_init(struct drm_device *dev)
 	engine->emit_flush = gen8_emit_flush_render;
 	engine->emit_request = gen8_emit_request_render;
 
-	engine->dev = dev;
-
 	ret = intel_init_pipe_control(engine);
 	if (ret)
 		return ret;
@@ -2079,7 +2094,7 @@ static int logical_render_ring_init(struct drm_device *dev)
 			  ret);
 	}
 
-	ret = logical_ring_init(dev, engine);
+	ret = logical_ring_init(engine);
 	if (ret) {
 		lrc_destroy_wa_ctx_obj(engine);
 	}
@@ -2089,70 +2104,54 @@ static int logical_render_ring_init(struct drm_device *dev)
 
 static int logical_bsd_ring_init(struct drm_device *dev)
 {
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_engine_cs *engine = &dev_priv->engine[VCS];
-
-	engine->name = "bsd ring";
-	engine->id = VCS;
-	engine->exec_id = I915_EXEC_BSD;
-	engine->guc_id = GUC_VIDEO_ENGINE;
-	engine->mmio_base = GEN6_BSD_RING_BASE;
+	struct intel_engine_cs *engine;
 
-	logical_ring_default_irqs(engine, GEN8_VCS1_IRQ_SHIFT);
-	logical_ring_default_vfuncs(dev, engine);
+	engine = logical_ring_setup(dev, VCS, "bsd ring",
+				    I915_EXEC_BSD,
+				    GUC_VIDEO_ENGINE,
+				    GEN6_BSD_RING_BASE,
+				    GEN8_VCS1_IRQ_SHIFT);
 
-	return logical_ring_init(dev, engine);
+	return logical_ring_init(engine);
 }
 
 static int logical_bsd2_ring_init(struct drm_device *dev)
 {
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_engine_cs *engine = &dev_priv->engine[VCS2];
-
-	engine->name = "bsd2 ring";
-	engine->id = VCS2;
-	engine->exec_id = I915_EXEC_BSD;
-	engine->guc_id = GUC_VIDEO_ENGINE2;
-	engine->mmio_base = GEN8_BSD2_RING_BASE;
+	struct intel_engine_cs *engine;
 
-	logical_ring_default_irqs(engine, GEN8_VCS2_IRQ_SHIFT);
-	logical_ring_default_vfuncs(dev, engine);
+	engine = logical_ring_setup(dev, VCS2, "bsd2 ring",
+				    I915_EXEC_BSD,
+				    GUC_VIDEO_ENGINE2,
+				    GEN8_BSD2_RING_BASE,
+				    GEN8_VCS2_IRQ_SHIFT);
 
-	return logical_ring_init(dev, engine);
+	return logical_ring_init(engine);
 }
 
 static int logical_blt_ring_init(struct drm_device *dev)
 {
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_engine_cs *engine = &dev_priv->engine[BCS];
-
-	engine->name = "blitter ring";
-	engine->id = BCS;
-	engine->exec_id = I915_EXEC_BLT;
-	engine->guc_id = GUC_BLITTER_ENGINE;
-	engine->mmio_base = BLT_RING_BASE;
+	struct intel_engine_cs *engine;
 
-	logical_ring_default_irqs(engine, GEN8_BCS_IRQ_SHIFT);
-	logical_ring_default_vfuncs(dev, engine);
+	engine = logical_ring_setup(dev, BCS, "blitter ring",
+				    I915_EXEC_BLT,
+				    GUC_BLITTER_ENGINE,
+				    BLT_RING_BASE,
+				    GEN8_BCS_IRQ_SHIFT);
 
-	return logical_ring_init(dev, engine);
+	return logical_ring_init(engine);
 }
 
 static int logical_vebox_ring_init(struct drm_device *dev)
 {
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_engine_cs *engine = &dev_priv->engine[VECS];
-
-	engine->name = "video enhancement ring";
-	engine->id = VECS;
-	engine->exec_id = I915_EXEC_VEBOX;
-	engine->guc_id = GUC_VIDEOENHANCE_ENGINE;
-	engine->mmio_base = VEBOX_RING_BASE;
+	struct intel_engine_cs *engine;
 
-	logical_ring_default_irqs(engine, GEN8_VECS_IRQ_SHIFT);
-	logical_ring_default_vfuncs(dev, engine);
+	engine = logical_ring_setup(dev, VECS, "video enhancement ring",
+				    I915_EXEC_VEBOX,
+				    GUC_VIDEOENHANCE_ENGINE,
+				    VEBOX_RING_BASE,
+				    GEN8_VECS_IRQ_SHIFT);
 
-	return logical_ring_init(dev, engine);
+	return logical_ring_init(engine);
 }
 
 /**
-- 
2.8.1

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