[Intel-gfx] [PATCH 2/2] drm/i915/trace: add hw_id to gem requests trace points

[Lionel Landwerlin]

When monitoring the GPU with i915 perf, reports are tagged with a hw
id. Gem context creation tracepoints already have a hw_id field,
unfortunately you only get this correlation between a process id and a
hw context id once when the context is created. It doesn't help if you
started monitoring after the process was initialized or if the drm fd
was transfered from one process to another.

This change adds the hw_id field to gem requests, so that correlation
can also be done on submission.

v2: Place hw_id at the end of the tracepoint to not disrupt too much
    existing tools (Chris)

v3: Reorder hw_id field again (Chris)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
---
 drivers/gpu/drm/i915/i915_trace.h | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 321f74bae0e1..042c43a4bd59 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -616,6 +616,7 @@ TRACE_EVENT(i915_gem_request_queue,
 
 	    TP_STRUCT__entry(
 			     __field(u32, dev)
+			     __field(u32, hw_id)
 			     __field(u32, ring)
 			     __field(u32, ctx)
 			     __field(u32, seqno)
@@ -624,15 +625,16 @@ TRACE_EVENT(i915_gem_request_queue,
 
 	    TP_fast_assign(
 			   __entry->dev = req->i915->drm.primary->index;
+			   __entry->hw_id = req->ctx->hw_id;
 			   __entry->ring = req->engine->id;
 			   __entry->ctx = req->fence.context;
 			   __entry->seqno = req->fence.seqno;
 			   __entry->flags = flags;
 			   ),
 
-	    TP_printk("dev=%u, ring=%u, ctx=%u, seqno=%u, flags=0x%x",
-		      __entry->dev, __entry->ring, __entry->ctx, __entry->seqno,
-		      __entry->flags)
+	    TP_printk("dev=%u, hw_id=%u, ring=%u, ctx=%u, seqno=%u, flags=0x%x",
+		      __entry->dev, __entry->hw_id, __entry->ring, __entry->ctx,
+		      __entry->seqno, __entry->flags)
 );
 
 DECLARE_EVENT_CLASS(i915_gem_request,
@@ -641,6 +643,7 @@ DECLARE_EVENT_CLASS(i915_gem_request,
 
 	    TP_STRUCT__entry(
 			     __field(u32, dev)
+			     __field(u32, hw_id)
 			     __field(u32, ring)
 			     __field(u32, ctx)
 			     __field(u32, seqno)
@@ -649,15 +652,16 @@ DECLARE_EVENT_CLASS(i915_gem_request,
 
 	    TP_fast_assign(
 			   __entry->dev = req->i915->drm.primary->index;
+			   __entry->hw_id = req->ctx->hw_id;
 			   __entry->ring = req->engine->id;
 			   __entry->ctx = req->fence.context;
 			   __entry->seqno = req->fence.seqno;
 			   __entry->global = req->global_seqno;
 			   ),
 
-	    TP_printk("dev=%u, ring=%u, ctx=%u, seqno=%u, global=%u",
-		      __entry->dev, __entry->ring, __entry->ctx, __entry->seqno,
-		      __entry->global)
+	    TP_printk("dev=%u, hw_id=%u, ring=%u, ctx=%u, seqno=%u, global=%u",
+		      __entry->dev, __entry->hw_id, __entry->ring, __entry->ctx,
+		      __entry->seqno, __entry->global)
 );
 
 DEFINE_EVENT(i915_gem_request, i915_gem_request_add,
@@ -683,6 +687,7 @@ DECLARE_EVENT_CLASS(i915_gem_request_hw,
 
 		    TP_STRUCT__entry(
 				     __field(u32, dev)
+				     __field(u32, hw_id)
 				     __field(u32, ring)
 				     __field(u32, ctx)
 				     __field(u32, seqno)
@@ -692,6 +697,7 @@ DECLARE_EVENT_CLASS(i915_gem_request_hw,
 
 		    TP_fast_assign(
 			           __entry->dev = req->i915->drm.primary->index;
+			           __entry->hw_id = req->ctx->hw_id;
 			           __entry->ring = req->engine->id;
 			           __entry->ctx = req->fence.context;
 			           __entry->seqno = req->fence.seqno;
@@ -699,10 +705,10 @@ DECLARE_EVENT_CLASS(i915_gem_request_hw,
 			           __entry->port = port;
 			          ),
 
-		    TP_printk("dev=%u, ring=%u, ctx=%u, seqno=%u, global=%u, port=%u",
-			      __entry->dev, __entry->ring, __entry->ctx,
-			      __entry->seqno, __entry->global_seqno,
-			      __entry->port)
+		    TP_printk("dev=%u, hw_id=%u, ring=%u, ctx=%u, seqno=%u, global=%u, port=%u",
+			      __entry->dev, __entry->hw_id, __entry->ring,
+			      __entry->ctx, __entry->seqno,
+			      __entry->global_seqno, __entry->port)
 );
 
 DEFINE_EVENT(i915_gem_request_hw, i915_gem_request_in,
-- 
2.15.1