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[09/62] drm/i915: Record the ringbuffer associated with the request

Message ID 1464971847-15809-10-git-send-email-chris@chris-wilson.co.uk (mailing list archive)
State New, archived
Headers show

Commit Message

Chris Wilson June 3, 2016, 4:36 p.m. UTC 
The request tells us where to read the ringbuf from, so use that
information to simplify the error capture. If no request was active at
the time of the hang, the ring is idle and there is no information
inside the ring pertaining to the hang.

Note carefully that this will reduce the amount of information stored in
the error state - any ring without an active request will not be
recorded.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Dave Gordon <david.s.gordon@intel.com>
---
 drivers/gpu/drm/i915/i915_gpu_error.c | 28 ++++++++--------------------
 1 file changed, 8 insertions(+), 20 deletions(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 81341fc4e61a..cf444ddec66e 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1076,7 +1076,6 @@  static void i915_gem_record_rings(struct drm_i915_private *dev_priv,
 
 	for (i = 0; i < I915_NUM_ENGINES; i++) {
 		struct intel_engine_cs *engine = &dev_priv->engine[i];
-		struct intel_ringbuffer *rbuf;
 
 		error->ring[i].pid = -1;
 
@@ -1091,6 +1090,7 @@  static void i915_gem_record_rings(struct drm_i915_private *dev_priv,
 		request = i915_gem_find_active_request(engine);
 		if (request) {
 			struct i915_address_space *vm;
+			struct intel_ringbuffer *rb;
 
 			vm = request->ctx && request->ctx->ppgtt ?
 				&request->ctx->ppgtt->base :
@@ -1121,26 +1121,14 @@  static void i915_gem_record_rings(struct drm_i915_private *dev_priv,
 				}
 				rcu_read_unlock();
 			}
-		}
 
-		if (i915.enable_execlists) {
-			/* TODO: This is only a small fix to keep basic error
-			 * capture working, but we need to add more information
-			 * for it to be useful (e.g. dump the context being
-			 * executed).
-			 */
-			if (request)
-				rbuf = request->ctx->engine[engine->id].ringbuf;
-			else
-				rbuf = dev_priv->kernel_context->engine[engine->id].ringbuf;
-		} else
-			rbuf = engine->buffer;
-
-		error->ring[i].cpu_ring_head = rbuf->head;
-		error->ring[i].cpu_ring_tail = rbuf->tail;
-
-		error->ring[i].ringbuffer =
-			i915_error_ggtt_object_create(dev_priv, rbuf->obj);
+			rb = request->ringbuf;
+			error->ring[i].cpu_ring_head = rb->head;
+			error->ring[i].cpu_ring_tail = rb->tail;
+			error->ring[i].ringbuffer =
+				i915_error_ggtt_object_create(dev_priv,
+							      rb->obj);
+		}
 
 		error->ring[i].hws_page =
 			i915_error_ggtt_object_create(dev_priv,