[PATCH 08/10] drm/i915/tdr: Export per-engine reset count info to debugfs

[Michel Thierry <michel.thierry@intel.com>]

From: Arun Siluvery <arun.siluvery@linux.intel.com>

A new variable is added to export the reset counts to debugfs, this
includes full gpu reset and engine reset count. This is useful for tests
where they are expected to trigger reset; these counts are checked before
and after the test to ensure the same.

v2: Include reset engine count in i915_engine_info too (Chris).

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Arun Siluvery <arun.siluvery@linux.intel.com>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 9d7b5a8c8dea..424d3ba8cab6 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1360,6 +1360,23 @@ static int i915_hangcheck_info(struct seq_file *m, void *unused)
 	return 0;
 }
 
+static int i915_reset_info(struct seq_file *m, void *unused)
+{
+	struct drm_i915_private *dev_priv = node_to_i915(m->private);
+	struct i915_gpu_error *error = &dev_priv->gpu_error;
+	struct intel_engine_cs *engine;
+	enum intel_engine_id id;
+
+	seq_printf(m, "full gpu reset = %u\n", i915_reset_count(error));
+
+	for_each_engine(engine, dev_priv, id) {
+		seq_printf(m, "%s = %u\n", engine->name,
+			   i915_reset_engine_count(error, engine));
+	}
+
+	return 0;
+}
+
 static int ironlake_drpc_info(struct seq_file *m)
 {
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
@@ -3140,6 +3157,7 @@ static int i915_display_info(struct seq_file *m, void *unused)
 static int i915_engine_info(struct seq_file *m, void *unused)
 {
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
+	struct i915_gpu_error *error = &dev_priv->gpu_error;
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;
 
@@ -3157,6 +3175,8 @@ static int i915_engine_info(struct seq_file *m, void *unused)
 			   intel_engine_last_submit(engine),
 			   engine->hangcheck.seqno,
 			   jiffies_to_msecs(jiffies - engine->hangcheck.action_timestamp));
+		seq_printf(m, "\tReset count: %d\n",
+			   i915_reset_engine_count(error, engine));
 
 		rcu_read_lock();
 
@@ -4555,6 +4575,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
 	{"i915_guc_log_dump", i915_guc_log_dump, 0},
 	{"i915_frequency_info", i915_frequency_info, 0},
 	{"i915_hangcheck_info", i915_hangcheck_info, 0},
+	{"i915_reset_info", i915_reset_info, 0},
 	{"i915_drpc_info", i915_drpc_info, 0},
 	{"i915_emon_status", i915_emon_status, 0},
 	{"i915_ring_freq_table", i915_ring_freq_table, 0},
-- 
2.11.0

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