[Intel-gfx] [CI 16/21] drm/i915: Make engine state pretty-printer header configurable

[Chris Wilson]

Pass in a format string (and args) to specify the header to be emitted
along with the engine state when pretty-printing. This allows the header
to be emitted inside the drm_printer stream, so sharing the same prefix
and output characteristics (e.g. debug level and filtering).

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c              |  2 +-
 drivers/gpu/drm/i915/intel_engine_cs.c           | 15 ++++++++++++---
 drivers/gpu/drm/i915/intel_ringbuffer.h          |  5 ++++-
 drivers/gpu/drm/i915/selftests/intel_hangcheck.c |  7 ++++---
 4 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 41d49a4d25d3..823fc6a74b98 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3218,7 +3218,7 @@ static int i915_engine_info(struct seq_file *m, void *unused)
 
 	p = drm_seq_file_printer(m);
 	for_each_engine(engine, dev_priv, id)
-		intel_engine_dump(engine, &p);
+		intel_engine_dump(engine, &p, "%s\n", engine->name);
 
 	intel_runtime_pm_put(dev_priv);
 
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index 959064607fb4..e51e90270d31 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -1585,7 +1585,7 @@ void intel_engines_park(struct drm_i915_private *i915)
 			dev_err(i915->drm.dev,
 				"%s is not idle before parking\n",
 				engine->name);
-			intel_engine_dump(engine, &p);
+			intel_engine_dump(engine, &p, NULL);
 		}
 
 		if (engine->park)
@@ -1655,7 +1655,9 @@ static void print_request(struct drm_printer *m,
 		   rq->timeline->common->name);
 }
 
-void intel_engine_dump(struct intel_engine_cs *engine, struct drm_printer *m)
+void intel_engine_dump(struct intel_engine_cs *engine,
+		       struct drm_printer *m,
+		       const char *header, ...)
 {
 	struct intel_breadcrumbs * const b = &engine->breadcrumbs;
 	const struct intel_engine_execlists * const execlists = &engine->execlists;
@@ -1666,7 +1668,14 @@ void intel_engine_dump(struct intel_engine_cs *engine, struct drm_printer *m)
 	char hdr[80];
 	u64 addr;
 
-	drm_printf(m, "%s\n", engine->name);
+	if (header) {
+		va_list ap;
+
+		va_start(ap, header);
+		drm_vprintf(m, header, &ap);
+		va_end(ap);
+	}
+
 	drm_printf(m, "\tcurrent seqno %x, last %x, hangcheck %x [%d ms], inflight %d\n",
 		   intel_engine_get_seqno(engine),
 		   intel_engine_last_submit(engine),
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index cbc9c36f675e..41ac69dbe554 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -926,6 +926,9 @@ unsigned int intel_engines_has_context_isolation(struct drm_i915_private *i915);
 
 bool intel_engine_can_store_dword(struct intel_engine_cs *engine);
 
-void intel_engine_dump(struct intel_engine_cs *engine, struct drm_printer *p);
+__printf(3, 4)
+void intel_engine_dump(struct intel_engine_cs *engine,
+		       struct drm_printer *m,
+		       const char *header, ...);
 
 #endif /* _INTEL_RINGBUFFER_H_ */
diff --git a/drivers/gpu/drm/i915/selftests/intel_hangcheck.c b/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
index f91e8c3e4ad8..8b51bf2becf1 100644
--- a/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
+++ b/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
@@ -618,7 +618,7 @@ static int igt_wait_reset(void *arg)
 
 		pr_err("Failed to start request %x, at %x\n",
 		       rq->fence.seqno, hws_seqno(&h, rq));
-		intel_engine_dump(rq->engine, &p);
+		intel_engine_dump(rq->engine, &p, "%s\n", rq->engine->name);
 
 		i915_reset(i915, 0);
 		i915_gem_set_wedged(i915);
@@ -713,7 +713,8 @@ static int igt_reset_queue(void *arg)
 
 				pr_err("Failed to start request %x, at %x\n",
 				       prev->fence.seqno, hws_seqno(&h, prev));
-				intel_engine_dump(rq->engine, &p);
+				intel_engine_dump(prev->engine, &p,
+						  "%s\n", prev->engine->name);
 
 				i915_gem_request_put(rq);
 				i915_gem_request_put(prev);
@@ -819,7 +820,7 @@ static int igt_handle_error(void *arg)
 
 		pr_err("Failed to start request %x, at %x\n",
 		       rq->fence.seqno, hws_seqno(&h, rq));
-		intel_engine_dump(rq->engine, &p);
+		intel_engine_dump(rq->engine, &p, "%s\n", rq->engine->name);
 
 		i915_reset(i915, 0);
 		i915_gem_set_wedged(i915);
-- 
2.15.0