[PATCH 36/64] drm/i915: Unify request submission

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Move request submission from emit_request into its own common vfunc
from i915_add_request().

Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_gem_request.c    |  7 +++----
 drivers/gpu/drm/i915/i915_guc_submission.c |  9 ++++++---
 drivers/gpu/drm/i915/intel_guc.h           |  1 -
 drivers/gpu/drm/i915/intel_lrc.c           | 10 +++-------
 drivers/gpu/drm/i915/intel_ringbuffer.c    | 26 ++++++++++----------------
 drivers/gpu/drm/i915/intel_ringbuffer.h    | 23 +++++++++++------------
 6 files changed, 33 insertions(+), 43 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c
index 18b9278d16f3..bb5a15eedfa4 100644
--- a/drivers/gpu/drm/i915/i915_gem_request.c
+++ b/drivers/gpu/drm/i915/i915_gem_request.c
@@ -468,12 +468,10 @@ void __i915_add_request(struct drm_i915_gem_request *request,
 	 */
 	request->postfix = intel_ring_get_tail(ring);
 
-	if (i915.enable_execlists)
-		ret = engine->emit_request(request);
-	else
-		ret = engine->add_request(request);
 	/* Not allowed to fail! */
+	ret = engine->emit_request(request);
 	WARN(ret, "emit|add_request failed: %d!\n", ret);
+
 	/* Sanity check that the reserved size was large enough. */
 	ret = intel_ring_get_tail(ring) - request_start;
 	if (ret < 0)
@@ -484,6 +482,7 @@ void __i915_add_request(struct drm_i915_gem_request *request,
 		  reserved_tail, ret);
 
 	i915_gem_mark_busy(engine);
+	engine->submit_request(request);
 }
 
 static unsigned long local_clock_us(unsigned int *cpu)
diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c
index eccd34832fe6..32d0e1890950 100644
--- a/drivers/gpu/drm/i915/i915_guc_submission.c
+++ b/drivers/gpu/drm/i915/i915_guc_submission.c
@@ -585,7 +585,7 @@ static int guc_ring_doorbell(struct i915_guc_client *gc)
  * The only error here arises if the doorbell hardware isn't functioning
  * as expected, which really shouln't happen.
  */
-int i915_guc_submit(struct drm_i915_gem_request *rq)
+static void i915_guc_submit(struct drm_i915_gem_request *rq)
 {
 	unsigned int engine_id = rq->engine->id;
 	struct intel_guc *guc = &rq->i915->guc;
@@ -602,8 +602,6 @@ int i915_guc_submit(struct drm_i915_gem_request *rq)
 
 	guc->submissions[engine_id] += 1;
 	guc->last_seqno[engine_id] = rq->fence.seqno;
-
-	return b_ret;
 }
 
 /*
@@ -992,6 +990,7 @@ int i915_guc_submission_enable(struct drm_i915_private *dev_priv)
 {
 	struct intel_guc *guc = &dev_priv->guc;
 	struct i915_guc_client *client;
+	struct intel_engine_cs *engine;
 
 	/* client for execbuf submission */
 	client = guc_client_alloc(dev_priv,
@@ -1006,6 +1005,10 @@ int i915_guc_submission_enable(struct drm_i915_private *dev_priv)
 	host2guc_sample_forcewake(guc, client);
 	guc_init_doorbell_hw(guc);
 
+	/* Take over from manual control of ELSP (execlists) */
+	for_each_engine(engine, dev_priv)
+		engine->submit_request = i915_guc_submit;
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h
index 3e3e743740c0..623cf26cd784 100644
--- a/drivers/gpu/drm/i915/intel_guc.h
+++ b/drivers/gpu/drm/i915/intel_guc.h
@@ -160,7 +160,6 @@ extern int intel_guc_resume(struct drm_device *dev);
 int i915_guc_submission_init(struct drm_i915_private *dev_priv);
 int i915_guc_submission_enable(struct drm_i915_private *dev_priv);
 int i915_guc_wq_check_space(struct drm_i915_gem_request *rq);
-int i915_guc_submit(struct drm_i915_gem_request *rq);
 void i915_guc_submission_disable(struct drm_i915_private *dev_priv);
 void i915_guc_submission_fini(struct drm_i915_private *dev_priv);
 
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 3b98148d1cf8..a8332135eea1 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -776,12 +776,6 @@ intel_logical_ring_advance_and_submit(struct drm_i915_gem_request *request)
 	 */
 	request->previous_context = engine->last_context;
 	engine->last_context = request->ctx;
-
-	if (i915.enable_guc_submission)
-		i915_guc_submit(request);
-	else
-		execlists_context_queue(request);
-
 	return 0;
 }
 
@@ -1905,8 +1899,10 @@ 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;
-	engine->emit_request = gen8_emit_request;
 	engine->emit_flush = gen8_emit_flush;
+	engine->emit_request = gen8_emit_request;
+	engine->submit_request = execlists_context_queue;
+
 	engine->irq_enable = gen8_logical_ring_enable_irq;
 	engine->irq_disable = gen8_logical_ring_disable_irq;
 	engine->emit_bb_start = gen8_emit_bb_start;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 63166a7cf70d..47f67ccab0a6 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1431,15 +1431,14 @@ static int gen6_signal(struct drm_i915_gem_request *signaller_req,
 }
 
 /**
- * gen6_add_request - Update the semaphore mailbox registers
+ * gen6_emit_request - Update the semaphore mailbox registers
  *
  * @request - request to write to the ring
  *
  * Update the mailbox registers in the *other* rings with the current seqno.
  * This acts like a signal in the canonical semaphore.
  */
-static int
-gen6_add_request(struct drm_i915_gem_request *req)
+static int gen6_emit_request(struct drm_i915_gem_request *req)
 {
 	struct intel_ring *ring = req->ring;
 	int ret;
@@ -1460,13 +1459,10 @@ gen6_add_request(struct drm_i915_gem_request *req)
 
 	req->tail = intel_ring_get_tail(ring);
 
-	req->engine->submit_request(req);
-
 	return 0;
 }
 
-static int
-gen8_render_add_request(struct drm_i915_gem_request *req)
+static int gen8_render_emit_request(struct drm_i915_gem_request *req)
 {
 	struct intel_engine_cs *engine = req->engine;
 	struct intel_ring *ring = req->ring;
@@ -1490,8 +1486,9 @@ gen8_render_add_request(struct drm_i915_gem_request *req)
 	intel_ring_emit(ring, 0);
 	intel_ring_emit(ring, MI_USER_INTERRUPT);
 	intel_ring_emit(ring, MI_NOOP);
+	intel_ring_advance(ring);
 
-	req->engine->submit_request(req);
+	req->tail = intel_ring_get_tail(ring);
 
 	return 0;
 }
@@ -1696,8 +1693,7 @@ bsd_ring_flush(struct drm_i915_gem_request *req,
 	return 0;
 }
 
-static int
-i9xx_add_request(struct drm_i915_gem_request *req)
+static int i9xx_emit_request(struct drm_i915_gem_request *req)
 {
 	struct intel_ring *ring = req->ring;
 	int ret;
@@ -1714,8 +1710,6 @@ i9xx_add_request(struct drm_i915_gem_request *req)
 
 	req->tail = intel_ring_get_tail(ring);
 
-	req->engine->submit_request(req);
-
 	return 0;
 }
 
@@ -2824,11 +2818,11 @@ static void intel_ring_default_vfuncs(struct drm_i915_private *dev_priv,
 				      struct intel_engine_cs *engine)
 {
 	engine->init_hw = init_ring_common;
-	engine->submit_request = i9xx_submit_request;
 
-	engine->add_request = i9xx_add_request;
+	engine->emit_request = i9xx_emit_request;
 	if (INTEL_GEN(dev_priv) >= 6)
-		engine->add_request = gen6_add_request;
+		engine->emit_request = gen6_emit_request;
+	engine->submit_request = i9xx_submit_request;
 
 	if (INTEL_GEN(dev_priv) >= 8)
 		engine->emit_bb_start = gen8_emit_bb_start;
@@ -2865,7 +2859,7 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
 
 	if (INTEL_GEN(dev_priv) >= 8) {
 		engine->init_context = intel_rcs_ctx_init;
-		engine->add_request = gen8_render_add_request;
+		engine->emit_request = gen8_render_emit_request;
 		engine->emit_flush = gen8_render_ring_flush;
 		if (i915.semaphores)
 			engine->semaphore.signal = gen8_rcs_signal;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index a4dbac23ce9d..f6fdfb8c1776 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -203,7 +203,17 @@ struct intel_engine_cs {
 
 	int		(*init_context)(struct drm_i915_gem_request *req);
 
-	int		(*add_request)(struct drm_i915_gem_request *req);
+	int		(*emit_flush)(struct drm_i915_gem_request *request,
+				      u32 invalidate_domains,
+				      u32 flush_domains);
+	int		(*emit_bb_start)(struct drm_i915_gem_request *req,
+					 u64 offset, u32 length,
+					 unsigned int dispatch_flags);
+#define I915_DISPATCH_SECURE 0x1
+#define I915_DISPATCH_PINNED 0x2
+#define I915_DISPATCH_RS     0x4
+	int		(*emit_request)(struct drm_i915_gem_request *req);
+	void		(*submit_request)(struct drm_i915_gem_request *req);
 	/* Some chipsets are not quite as coherent as advertised and need
 	 * an expensive kick to force a true read of the up-to-date seqno.
 	 * However, the up-to-date seqno is not always required and the last
@@ -281,17 +291,6 @@ struct intel_engine_cs {
 	unsigned int idle_lite_restore_wa;
 	bool disable_lite_restore_wa;
 	u32 ctx_desc_template;
-	int		(*emit_request)(struct drm_i915_gem_request *request);
-	int		(*emit_flush)(struct drm_i915_gem_request *request,
-				      u32 invalidate_domains,
-				      u32 flush_domains);
-	int		(*emit_bb_start)(struct drm_i915_gem_request *req,
-					 u64 offset, u32 length,
-					 unsigned int dispatch_flags);
-#define I915_DISPATCH_SECURE 0x1
-#define I915_DISPATCH_PINNED 0x2
-#define I915_DISPATCH_RS     0x4
-	void		(*submit_request)(struct drm_i915_gem_request *req);
 
 	/**
 	 * List of objects currently involved in rendering from the
-- 
2.8.1

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