[Intel-gfx] [PATCH 3/4] drm/i915: Cleanup handling of last_fenced_seqno

[Chris Wilson]

Cc: Andy Whitcroft <apw at canonical.com>
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem.c |   29 +++++++++++++++++------------
 1 files changed, 17 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 5201f82..2dbf8f7 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2461,13 +2461,15 @@ i915_gem_object_flush_fence(struct drm_i915_gem_object *obj,
 		obj->fenced_gpu_access = false;
 	}
 
+	if (obj->last_fenced_seqno &&
+	    ring_passed_seqno(obj->ring, obj->last_fenced_seqno))
+		obj->last_fenced_seqno = 0;
+
 	if (obj->last_fenced_seqno && pipelined != obj->ring) {
-		if (!ring_passed_seqno(obj->ring, obj->last_fenced_seqno)) {
-			ret = i915_wait_request(obj->ring,
-						obj->last_fenced_seqno);
-			if (ret)
-				return ret;
-		}
+		ret = i915_wait_request(obj->ring,
+					obj->last_fenced_seqno);
+		if (ret)
+			return ret;
 
 		obj->last_fenced_seqno = 0;
 	}
@@ -2586,9 +2588,6 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj,
 			if (ret)
 				return ret;
 
-			if (!obj->fenced_gpu_access && !obj->last_fenced_seqno)
-				pipelined = NULL;
-
 			goto update;
 		}
 
@@ -2606,9 +2605,12 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj,
 				reg->setup_ring = NULL;
 			}
 		} else if (obj->last_fenced_seqno && obj->ring != pipelined) {
-			ret = i915_gem_object_flush_fence(obj, pipelined);
+			ret = i915_wait_request(obj->ring,
+						obj->last_fenced_seqno);
 			if (ret)
 				return ret;
+
+			obj->last_fenced_seqno = 0;
 		}
 
 		return 0;
@@ -2648,15 +2650,18 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj,
 						       old->last_fenced_seqno);
 		}
 
+		obj->last_fenced_seqno = old->last_fenced_seqno;
 		drm_gem_object_unreference(&old->base);
-	} else if (obj->last_fenced_seqno == 0)
-		pipelined = NULL;
+	}
 
 	reg->obj = obj;
 	list_move_tail(&reg->lru_list, &dev_priv->mm.fence_list);
 	obj->fence_reg = reg - dev_priv->fence_regs;
 
 update:
+	if (obj->last_fenced_seqno == 0)
+		pipelined = NULL;
+
 	reg->setup_seqno =
 		pipelined ? i915_gem_next_request_seqno(pipelined) : 0;
 	reg->setup_ring = pipelined;
-- 
1.7.2.3