Re: [PATCH 46/59] drm/i915: Update ring->sync_to() to take a request structure

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On 19/03/2015 12:30, John.C.Harrison@xxxxxxxxx wrote:
From: John Harrison <John.C.Harrison@xxxxxxxxx>

Updated the ring->sync_to() implementations to take a request instead of a ring.
Also updated the tracer to include the request id.

For: VIZ-5115
Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx>
---
  drivers/gpu/drm/i915/i915_gem.c         |    4 ++--
  drivers/gpu/drm/i915/i915_trace.h       |   14 ++++++++------
  drivers/gpu/drm/i915/intel_ringbuffer.c |    6 ++++--
  drivers/gpu/drm/i915/intel_ringbuffer.h |    4 ++--
  4 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 881c6ea..7304290 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3003,8 +3003,8 @@ i915_gem_object_sync(struct drm_i915_gem_object *obj,
  	if (ret)
  		return ret;

-	trace_i915_gem_ring_sync_to(from, to, obj->last_read_req);
-	ret = to->semaphore.sync_to(to, from, seqno);
+	trace_i915_gem_ring_sync_to(*to_req, from, obj->last_read_req);
+	ret = to->semaphore.sync_to(*to_req, from, seqno);
  	if (!ret)
  		/* We use last_read_req because sync_to()
  		 * might have just caused seqno wrap under
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index f044e29..8ca536c 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -326,29 +326,31 @@ TRACE_EVENT(i915_gem_evict_vm,
  );

  TRACE_EVENT(i915_gem_ring_sync_to,
-	    TP_PROTO(struct intel_engine_cs *from,
-		     struct intel_engine_cs *to,
+	    TP_PROTO(struct drm_i915_gem_request *to_req,
+		     struct intel_engine_cs *from,
  		     struct drm_i915_gem_request *req),
-	    TP_ARGS(from, to, req),
+	    TP_ARGS(to_req, from, req),

  	    TP_STRUCT__entry(
  			     __field(u32, dev)
  			     __field(u32, sync_from)
  			     __field(u32, sync_to)
+			     __field(u32, uniq_to)
  			     __field(u32, seqno)
  			     ),

  	    TP_fast_assign(
  			   __entry->dev = from->dev->primary->index;
  			   __entry->sync_from = from->id;
-			   __entry->sync_to = to->id;
+			   __entry->sync_to = to_req->ring->id;
+			   __entry->uniq_to = to_req->uniq;
  			   __entry->seqno = i915_gem_request_get_seqno(req);
  			   ),

-	    TP_printk("dev=%u, sync-from=%u, sync-to=%u, seqno=%u",
+	    TP_printk("dev=%u, sync-from=%u, sync-to=%u, seqno=%u, to_uniq=%u",
  		      __entry->dev,
  		      __entry->sync_from, __entry->sync_to,
-		      __entry->seqno)
+		      __entry->seqno, __entry->uniq_to)
  );

  TRACE_EVENT(i915_gem_ring_dispatch,
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 77d357f..2de43c8 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1284,10 +1284,11 @@ static inline bool i915_gem_has_seqno_wrapped(struct drm_device *dev,
   */

  static int
-gen8_ring_sync(struct intel_engine_cs *waiter,
+gen8_ring_sync(struct drm_i915_gem_request *waiter_req,
  	       struct intel_engine_cs *signaller,
  	       u32 seqno)
  {
+	struct intel_engine_cs *waiter = waiter_req->ring;
  	struct drm_i915_private *dev_priv = waiter->dev->dev_private;
  	int ret;

@@ -1309,10 +1310,11 @@ gen8_ring_sync(struct intel_engine_cs *waiter,
  }

  static int
-gen6_ring_sync(struct intel_engine_cs *waiter,
+gen6_ring_sync(struct drm_i915_gem_request *waiter_req,
  	       struct intel_engine_cs *signaller,
  	       u32 seqno)
  {
+	struct intel_engine_cs *waiter = waiter_req->ring;
  	u32 dw1 = MI_SEMAPHORE_MBOX |
  		  MI_SEMAPHORE_COMPARE |
  		  MI_SEMAPHORE_REGISTER;
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 2d1d8a6..1107f82 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -222,8 +222,8 @@ struct  intel_engine_cs {
  		};

  		/* AKA wait() */
-		int	(*sync_to)(struct intel_engine_cs *ring,
-				   struct intel_engine_cs *to,
+		int	(*sync_to)(struct drm_i915_gem_request *to_req,
+				   struct intel_engine_cs *from,
  				   u32 seqno);
  		int	(*signal)(struct intel_engine_cs *signaller,
  				  /* num_dwords needed by caller */


Reviewed-by: Tomas Elf <tomas.elf@xxxxxxxxx>

Thanks,
Tomas
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