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* [PATCH] drm/i915: unify first-stage engine struct setup
@ 2016-06-30 15:46 Dave Gordon
  2016-06-30 16:16 ` ✓ Ro.CI.BAT: success for " Patchwork
  2016-06-30 16:43 ` [PATCH] " Tvrtko Ursulin
  0 siblings, 2 replies; 3+ messages in thread
From: Dave Gordon @ 2016-06-30 15:46 UTC (permalink / raw)
  To: intel-gfx

intel_lrc.c has a table of "logical rings" (meaning engines), while
intel_ringbuffer.c has separately open-coded initialisation for each
engine. We can deduplicate this somewhat by using the same first-stage
engine-setup function for both modes.

So here we expose the function that transfers information from the
static table of (all) known engines to the dev_priv->engine array of
engines available on this device (adjusting the names along the way)
and then embed calls to it in both the LRC and the legacy-mode setup.

Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
---
 drivers/gpu/drm/i915/intel_lrc.c        | 40 +++++++++++++++++++++------------
 drivers/gpu/drm/i915/intel_ringbuffer.c | 39 +++++++++-----------------------
 drivers/gpu/drm/i915/intel_ringbuffer.h |  5 +++++
 3 files changed, 41 insertions(+), 43 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 62b0dc6..bd6266e 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1991,8 +1991,9 @@ void intel_logical_ring_cleanup(struct intel_engine_cs *engine)
 }
 
 static inline void
-logical_ring_default_irqs(struct intel_engine_cs *engine, unsigned shift)
+logical_ring_default_irqs(struct intel_engine_cs *engine)
 {
+	unsigned shift = engine->irq_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);
@@ -2093,14 +2094,14 @@ static int logical_render_ring_init(struct intel_engine_cs *engine)
 	return ret;
 }
 
-static const struct logical_ring_info {
+static const struct engine_info {
 	const char *name;
 	unsigned exec_id;
 	unsigned guc_id;
 	u32 mmio_base;
 	unsigned irq_shift;
 	int (*init)(struct intel_engine_cs *engine);
-} logical_rings[] = {
+} intel_engines[] = {
 	[RCS] = {
 		.name = "render ring",
 		.exec_id = I915_EXEC_RENDER,
@@ -2143,20 +2144,31 @@ static int logical_render_ring_init(struct intel_engine_cs *engine)
 	},
 };
 
-static struct intel_engine_cs *
-logical_ring_setup(struct drm_i915_private *dev_priv, enum intel_engine_id id)
+struct intel_engine_cs *
+intel_engine_setup(struct drm_i915_private *dev_priv,
+		   enum intel_engine_id id)
 {
-	const struct logical_ring_info *info = &logical_rings[id];
+	const struct engine_info *info = &intel_engines[id];
 	struct intel_engine_cs *engine = &dev_priv->engine[id];
-	enum forcewake_domains fw_domains;
 
 	engine->id = id;
+	engine->i915 = dev_priv;
 	engine->name = info->name;
 	engine->exec_id = info->exec_id;
-	engine->guc_id = info->guc_id;
+	engine->hw_id = engine->guc_id = info->guc_id;
 	engine->mmio_base = info->mmio_base;
+	engine->irq_shift = info->irq_shift;
 
-	engine->i915 = dev_priv;
+	return engine;
+}
+
+static struct intel_engine_cs *
+logical_ring_setup(struct drm_i915_private *dev_priv, enum intel_engine_id id)
+{
+	struct intel_engine_cs *engine;
+	enum forcewake_domains fw_domains;
+
+	engine = intel_engine_setup(dev_priv, id);
 
 	/* Intentionally left blank. */
 	engine->buffer = NULL;
@@ -2186,7 +2198,7 @@ static int logical_render_ring_init(struct intel_engine_cs *engine)
 
 	logical_ring_init_platform_invariants(engine);
 	logical_ring_default_vfuncs(engine);
-	logical_ring_default_irqs(engine, info->irq_shift);
+	logical_ring_default_irqs(engine);
 
 	intel_engine_init_hangcheck(engine);
 	i915_gem_batch_pool_init(dev_priv->dev, &engine->batch_pool);
@@ -2215,14 +2227,14 @@ int intel_logical_rings_init(struct drm_device *dev)
 	WARN_ON(INTEL_INFO(dev_priv)->ring_mask &
 		GENMASK(sizeof(mask) * BITS_PER_BYTE - 1, I915_NUM_ENGINES));
 
-	for (i = 0; i < ARRAY_SIZE(logical_rings); i++) {
+	for (i = 0; i < ARRAY_SIZE(intel_engines); i++) {
 		if (!HAS_ENGINE(dev_priv, i))
 			continue;
 
-		if (!logical_rings[i].init)
+		if (!intel_engines[i].init)
 			continue;
 
-		ret = logical_rings[i].init(logical_ring_setup(dev_priv, i));
+		ret = intel_engines[i].init(logical_ring_setup(dev_priv, i));
 		if (ret)
 			goto cleanup;
 
@@ -2230,7 +2242,7 @@ int intel_logical_rings_init(struct drm_device *dev)
 	}
 
 	/*
-	 * Catch failures to update logical_rings table when the new engines
+	 * Catch failures to update intel_engines table when the new engines
 	 * are added to the driver by a warning and disabling the forgotten
 	 * engines.
 	 */
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 04a2d14..e6020a4 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -2876,15 +2876,11 @@ static int gen6_ring_flush(struct drm_i915_gem_request *req,
 int intel_init_render_ring_buffer(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;
 	struct drm_i915_gem_object *obj;
 	int ret;
 
-	engine->name = "render ring";
-	engine->id = RCS;
-	engine->exec_id = I915_EXEC_RENDER;
-	engine->hw_id = 0;
-	engine->mmio_base = RENDER_RING_BASE;
+	engine = intel_engine_setup(dev_priv, RCS);
 
 	if (INTEL_GEN(dev_priv) >= 8) {
 		if (i915_semaphore_is_enabled(dev_priv)) {
@@ -3029,12 +3025,9 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
 int intel_init_bsd_ring_buffer(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_engine_cs *engine = &dev_priv->engine[VCS];
+	struct intel_engine_cs *engine;
 
-	engine->name = "bsd ring";
-	engine->id = VCS;
-	engine->exec_id = I915_EXEC_BSD;
-	engine->hw_id = 1;
+	engine = intel_engine_setup(dev_priv, VCS);
 
 	engine->write_tail = ring_write_tail;
 	if (INTEL_GEN(dev_priv) >= 6) {
@@ -3108,15 +3101,11 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
 int intel_init_bsd2_ring_buffer(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_engine_cs *engine = &dev_priv->engine[VCS2];
+	struct intel_engine_cs *engine;
 
-	engine->name = "bsd2 ring";
-	engine->id = VCS2;
-	engine->exec_id = I915_EXEC_BSD;
-	engine->hw_id = 4;
+	engine = intel_engine_setup(dev_priv, VCS2);
 
 	engine->write_tail = ring_write_tail;
-	engine->mmio_base = GEN8_BSD2_RING_BASE;
 	engine->flush = gen6_bsd_ring_flush;
 	engine->add_request = gen6_add_request;
 	engine->irq_seqno_barrier = gen6_seqno_barrier;
@@ -3141,14 +3130,10 @@ int intel_init_bsd2_ring_buffer(struct drm_device *dev)
 int intel_init_blt_ring_buffer(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_engine_cs *engine = &dev_priv->engine[BCS];
+	struct intel_engine_cs *engine;
 
-	engine->name = "blitter ring";
-	engine->id = BCS;
-	engine->exec_id = I915_EXEC_BLT;
-	engine->hw_id = 2;
+	engine = intel_engine_setup(dev_priv, BCS);
 
-	engine->mmio_base = BLT_RING_BASE;
 	engine->write_tail = ring_write_tail;
 	engine->flush = gen6_ring_flush;
 	engine->add_request = gen6_add_request;
@@ -3201,14 +3186,10 @@ int intel_init_blt_ring_buffer(struct drm_device *dev)
 int intel_init_vebox_ring_buffer(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_engine_cs *engine = &dev_priv->engine[VECS];
+	struct intel_engine_cs *engine;
 
-	engine->name = "video enhancement ring";
-	engine->id = VECS;
-	engine->exec_id = I915_EXEC_VEBOX;
-	engine->hw_id = 3;
+	engine = intel_engine_setup(dev_priv, VECS);
 
-	engine->mmio_base = VEBOX_RING_BASE;
 	engine->write_tail = ring_write_tail;
 	engine->flush = gen6_ring_flush;
 	engine->add_request = gen6_add_request;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index b33c876..c512e43 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -157,6 +157,7 @@ struct intel_engine_cs {
 	unsigned int hw_id;
 	unsigned int guc_id; /* XXX same as hw_id? */
 	u32		mmio_base;
+	unsigned int irq_shift;
 	struct intel_ringbuffer *buffer;
 	struct list_head buffers;
 
@@ -347,6 +348,10 @@ struct intel_engine_cs {
 	u32 (*get_cmd_length_mask)(u32 cmd_header);
 };
 
+struct intel_engine_cs *
+intel_engine_setup(struct drm_i915_private *dev_priv,
+		   enum intel_engine_id id);
+
 static inline bool
 intel_engine_initialized(struct intel_engine_cs *engine)
 {
-- 
1.9.1

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2016-06-30 15:46 [PATCH] drm/i915: unify first-stage engine struct setup Dave Gordon
2016-06-30 16:16 ` ✓ Ro.CI.BAT: success for " Patchwork
2016-06-30 16:43 ` [PATCH] " Tvrtko Ursulin

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