drm/i915/guc: Add trace point for GuC submit

Add trace point for GuC submit. Extended existing request trace points
to include submit fence value,, guc_id, and ring tail value.

v2: Fix white space alignment in i915_request_add trace point
v3: Delete dep_from , dep_to (Tvrtko)

Cc: John Harrison <john.c.harrison@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210721215101.139794-18-matthew.brost@intel.com

drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c

@@ -418,6 +418,7 @@ static int guc_dequeue_one_context(struct intel_guc *guc)
 			guc->stalled_request = last;
 			return false;
 		}
+		trace_i915_request_guc_submit(last);
 	}
 
 	guc->stalled_request = NULL;
@@ -638,6 +639,8 @@ static int guc_bypass_tasklet_submit(struct intel_guc *guc,
 	ret = guc_add_request(guc, rq);
 	if (ret == -EBUSY)
 		guc->stalled_request = rq;
+	else
+		trace_i915_request_guc_submit(rq);
 
 	return ret;
 }

drivers/gpu/drm/i915/i915_trace.h

@@ -794,30 +794,40 @@ DECLARE_EVENT_CLASS(i915_request,
 	    TP_STRUCT__entry(
 			     __field(u32, dev)
 			     __field(u64, ctx)
+			     __field(u32, guc_id)
 			     __field(u16, class)
 			     __field(u16, instance)
 			     __field(u32, seqno)
+			     __field(u32, tail)
 			     ),
 
 	    TP_fast_assign(
 			   __entry->dev = rq->engine->i915->drm.primary->index;
 			   __entry->class = rq->engine->uabi_class;
 			   __entry->instance = rq->engine->uabi_instance;
+			   __entry->guc_id = rq->context->guc_id;
 			   __entry->ctx = rq->fence.context;
 			   __entry->seqno = rq->fence.seqno;
+			   __entry->tail = rq->tail;
 			   ),
 
-	    TP_printk("dev=%u, engine=%u:%u, ctx=%llu, seqno=%u",
+	    TP_printk("dev=%u, engine=%u:%u, guc_id=%u, ctx=%llu, seqno=%u, tail=%u",
 		      __entry->dev, __entry->class, __entry->instance,
-		      __entry->ctx, __entry->seqno)
+		      __entry->guc_id, __entry->ctx, __entry->seqno,
+		      __entry->tail)
 );
 
 DEFINE_EVENT(i915_request, i915_request_add,
-	    TP_PROTO(struct i915_request *rq),
-	    TP_ARGS(rq)
+	     TP_PROTO(struct i915_request *rq),
+	     TP_ARGS(rq)
 );
 
 #if defined(CONFIG_DRM_I915_LOW_LEVEL_TRACEPOINTS)
+DEFINE_EVENT(i915_request, i915_request_guc_submit,
+	     TP_PROTO(struct i915_request *rq),
+	     TP_ARGS(rq)
+);
+
 DEFINE_EVENT(i915_request, i915_request_submit,
 	     TP_PROTO(struct i915_request *rq),
 	     TP_ARGS(rq)
@@ -887,6 +897,11 @@ TRACE_EVENT(i915_request_out,
 
 #else
 #if !defined(TRACE_HEADER_MULTI_READ)
+static inline void
+trace_i915_request_guc_submit(struct i915_request *rq)
+{
+}
+
 static inline void
 trace_i915_request_submit(struct i915_request *rq)
 {