[Intel-gfx] [PATCH 12/14] drm/i915/tdr: Add engine reset count to error state

[Arun Siluvery]

Driver maintains count of how many times a given engine is reset, useful to
capture this in error state also. It gives an idea of how engine is coping
up with the workloads it is executing before this error state.

Signed-off-by: Arun Siluvery <arun.siluvery at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h       | 1 +
 drivers/gpu/drm/i915/i915_gpu_error.c | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2aafb2f..b4558483 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -490,6 +490,7 @@ struct drm_i915_error_state {
 		int hangcheck_score;
 		enum intel_ring_hangcheck_action hangcheck_action;
 		int num_requests;
+		u32 reset_count;
 
 		/* our own tracking of ring head and tail */
 		u32 cpu_ring_head;
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 89725c9..76359c2 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -303,6 +303,7 @@ static void i915_ring_error_state(struct drm_i915_error_state_buf *m,
 	err_printf(m, "  hangcheck: %s [%d]\n",
 		   hangcheck_action_to_str(ring->hangcheck_action),
 		   ring->hangcheck_score);
+	err_printf(m, "  engine reset count: %u\n", ring->reset_count);
 }
 
 void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...)
@@ -970,6 +971,8 @@ static void i915_record_ring_state(struct drm_device *dev,
 
 	ering->hangcheck_score = engine->hangcheck.score;
 	ering->hangcheck_action = engine->hangcheck.action;
+	ering->reset_count = i915_engine_reset_count(&dev_priv->gpu_error,
+						     engine);
 
 	if (USES_PPGTT(dev)) {
 		int i;
-- 
1.9.1