From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 27 Mar 2018 22:01:57 +0100
Subject: drm/i915: Include the HW breadcrumb whenever we trace the global_seqno
Git-commit: e770276079fd6e1088a255dee182a3c09a2d7aa9
Patch-mainline: v4.18-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

When we include a request's global_seqno in a GEM_TRACE it often helps
to know how that relates to the current breadcrumb as seen by the
hardware.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180327210157.16896-3-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/i915/i915_request.c |   28 +++++++++++++++++-----------
 drivers/gpu/drm/i915/intel_lrc.c    |    6 ++++--
 2 files changed, 21 insertions(+), 13 deletions(-)

--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -214,8 +214,11 @@ static int reset_all_global_seqno(struct
 		struct i915_gem_timeline *timeline;
 		struct intel_timeline *tl = engine->timeline;
 
-		GEM_TRACE("%s seqno %d -> %d\n",
-			  engine->name, tl->seqno, seqno);
+		GEM_TRACE("%s seqno %d (current %d) -> %d\n",
+			  engine->name,
+			  tl->seqno,
+			  intel_engine_get_seqno(engine),
+			  seqno);
 
 		if (!i915_seqno_passed(seqno, tl->seqno)) {
 			/* Flush any waiters before we reuse the seqno */
@@ -386,10 +389,11 @@ static void i915_request_retire(struct i
 	struct intel_engine_cs *engine = request->engine;
 	struct i915_gem_active *active, *next;
 
-	GEM_TRACE("%s(%d) fence %llx:%d, global_seqno %d\n",
-		  engine->name, intel_engine_get_seqno(engine),
+	GEM_TRACE("%s fence %llx:%d, global_seqno %d, current %d\n",
+		  engine->name,
 		  request->fence.context, request->fence.seqno,
-		  request->global_seqno);
+		  request->global_seqno,
+		  intel_engine_get_seqno(engine));
 
 	lockdep_assert_held(&request->i915->drm.struct_mutex);
 	GEM_BUG_ON(!i915_sw_fence_signaled(&request->submit));
@@ -508,10 +512,11 @@ void __i915_request_submit(struct i915_r
 	struct intel_engine_cs *engine = request->engine;
 	u32 seqno;
 
-	GEM_TRACE("%s fence %llx:%d -> global_seqno %d\n",
-		  request->engine->name,
+	GEM_TRACE("%s fence %llx:%d -> global_seqno %d, current %d\n",
+		  engine->name,
 		  request->fence.context, request->fence.seqno,
-		  engine->timeline->seqno + 1);
+		  engine->timeline->seqno + 1,
+		  intel_engine_get_seqno(engine));
 
 	GEM_BUG_ON(!irqs_disabled());
 	lockdep_assert_held(&engine->timeline->lock);
@@ -557,10 +562,11 @@ void __i915_request_unsubmit(struct i915
 {
 	struct intel_engine_cs *engine = request->engine;
 
-	GEM_TRACE("%s fence %llx:%d <- global_seqno %d\n",
-		  request->engine->name,
+	GEM_TRACE("%s fence %llx:%d <- global_seqno %d, current %d\n",
+		  engine->name,
 		  request->fence.context, request->fence.seqno,
-		  request->global_seqno);
+		  request->global_seqno,
+		  intel_engine_get_seqno(engine));
 
 	GEM_BUG_ON(!irqs_disabled());
 	lockdep_assert_held(&engine->timeline->lock);
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -454,10 +454,11 @@ static void execlists_submit_ports(struc
 			desc = execlists_update_context(rq);
 			GEM_DEBUG_EXEC(port[n].context_id = upper_32_bits(desc));
 
-			GEM_TRACE("%s in[%d]:  ctx=%d.%d, seqno=%x, prio=%d\n",
+			GEM_TRACE("%s in[%d]:  ctx=%d.%d, seqno=%d (current %d), prio=%d\n",
 				  engine->name, n,
 				  port[n].context_id, count,
 				  rq->global_seqno,
+				  intel_engine_get_seqno(engine),
 				  rq_prio(rq));
 		} else {
 			GEM_BUG_ON(!n);
@@ -1000,10 +1001,11 @@ static void execlists_submission_tasklet
 							EXECLISTS_ACTIVE_USER));
 
 			rq = port_unpack(port, &count);
-			GEM_TRACE("%s out[0]: ctx=%d.%d, seqno=%x, prio=%d\n",
+			GEM_TRACE("%s out[0]: ctx=%d.%d, seqno=%d (current %d), prio=%d\n",
 				  engine->name,
 				  port->context_id, count,
 				  rq ? rq->global_seqno : 0,
+				  intel_engine_get_seqno(engine),
 				  rq ? rq_prio(rq) : 0);
 
 			/* Check the context/desc id for this event matches */