[RFC 09/21] drm/i915: Make 'i915_gem_check_olr' actually check by request not seqno

[John.C.Harrison@xxxxxxxxx]

From: John Harrison <John.C.Harrison@xxxxxxxxx>

For: VIZ-4377
Signed-off-by: John.C.Harrison@xxxxxxxxx
---
 drivers/gpu/drm/i915/i915_drv.h      |   17 ++++++++++++++++-
 drivers/gpu/drm/i915/i915_gem.c      |   25 ++++++++++---------------
 drivers/gpu/drm/i915/intel_display.c |    2 +-
 3 files changed, 27 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 1401266..9504206 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2483,7 +2483,7 @@ bool i915_gem_retire_requests(struct drm_device *dev);
 void i915_gem_retire_requests_ring(struct intel_engine_cs *ring);
 int __must_check i915_gem_check_wedge(struct i915_gpu_error *error,
 				      bool interruptible);
-int __must_check i915_gem_check_olr(struct intel_engine_cs *ring, u32 seqno);
+int __must_check i915_gem_check_olr(struct drm_i915_gem_request *req);
 
 static inline bool i915_reset_in_progress(struct i915_gpu_error *error)
 {
@@ -3020,4 +3020,19 @@ wait_remaining_ms_from_jiffies(unsigned long timestamp_jiffies, int to_wait_ms)
 	}
 }
 
+/************************* Deprecated *************************/
+static inline int __must_check i915_gem_check_ols(struct intel_engine_cs *ring, u32 seqno)
+{
+	int ret;
+
+	BUG_ON(!mutex_is_locked(&ring->dev->struct_mutex));
+
+	ret = 0;
+	if (seqno == i915_gem_request_get_seqno(ring->outstanding_lazy_request))
+		ret = i915_add_request(ring, NULL);
+
+	return ret;
+}
+/************************* Deprecated *************************/
+
 #endif
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 0d0eb26..2c7deca 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1097,19 +1097,18 @@ i915_gem_check_wedge(struct i915_gpu_error *error,
 }
 
 /*
- * Compare seqno against outstanding lazy request. Emit a request if they are
- * equal.
+ * Compare arbitrary request against outstanding lazy request. Emit on match.
  */
 int
-i915_gem_check_olr(struct intel_engine_cs *ring, u32 seqno)
+i915_gem_check_olr(struct drm_i915_gem_request *req)
 {
 	int ret;
 
-	BUG_ON(!mutex_is_locked(&ring->dev->struct_mutex));
+	BUG_ON(!mutex_is_locked(&req->ring->dev->struct_mutex));
 
 	ret = 0;
-	if (seqno == i915_gem_request_get_seqno(ring->outstanding_lazy_request))
-		ret = i915_add_request(ring, NULL);
+	if (req == req->ring->outstanding_lazy_request)
+		ret = i915_add_request(req->ring, NULL);
 
 	return ret;
 }
@@ -1271,7 +1270,7 @@ i915_wait_seqno(struct intel_engine_cs *ring, uint32_t seqno)
 	if (ret)
 		return ret;
 
-	ret = i915_gem_check_olr(ring, seqno);
+	ret = i915_gem_check_ols(ring, seqno);
 	if (ret)
 		return ret;
 
@@ -1338,7 +1337,6 @@ i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object *obj,
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_engine_cs *ring = obj->ring;
 	unsigned reset_counter;
-	u32 seqno;
 	int ret;
 
 	BUG_ON(!mutex_is_locked(&dev->struct_mutex));
@@ -1348,21 +1346,18 @@ i915_gem_object_wait_rendering__nonblocking(struct drm_i915_gem_object *obj,
 	if (!req)
 		return 0;
 
-	seqno = i915_gem_request_get_seqno(req);
-	BUG_ON(seqno == 0);
-
 	ret = i915_gem_check_wedge(&dev_priv->gpu_error, true);
 	if (ret)
 		return ret;
 
-	ret = i915_gem_check_olr(ring, seqno);
+	ret = i915_gem_check_olr(req);
 	if (ret)
 		return ret;
 
 	reset_counter = atomic_read(&dev_priv->gpu_error.reset_counter);
 	i915_gem_request_reference(req);
 	mutex_unlock(&dev->struct_mutex);
-	ret = __wait_seqno(ring, seqno, reset_counter, true, NULL, file_priv);
+	ret = __wait_seqno(ring, i915_gem_request_get_seqno(req), reset_counter, true, NULL, file_priv);
 	mutex_lock(&dev->struct_mutex);
 	i915_gem_request_unreference(req);
 	if (ret)
@@ -2786,7 +2781,7 @@ i915_gem_object_flush_active(struct drm_i915_gem_object *obj)
 	int ret;
 
 	if (obj->active) {
-		ret = i915_gem_check_olr(obj->ring, i915_gem_request_get_seqno(obj->last_read_req));
+		ret = i915_gem_check_olr(obj->last_read_req);
 		if (ret)
 			return ret;
 
@@ -2913,7 +2908,7 @@ i915_gem_object_sync(struct drm_i915_gem_object *obj,
 	if (seqno <= from->semaphore.sync_seqno[idx]) /* <--- broken?! needs to use i915_seqno_passed()??? */
 		return 0;
 
-	ret = i915_gem_check_olr(obj->ring, seqno);
+	ret = i915_gem_check_olr(obj->last_read_req);
 	if (ret)
 		return ret;
 
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 6da18c5..2af421e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9775,7 +9775,7 @@ static int intel_postpone_flip(struct drm_i915_gem_object *obj)
 			      i915_gem_request_get_seqno(obj->last_write_req)))
 		return 0;
 
-	ret = i915_gem_check_olr(ring, i915_gem_request_get_seqno(obj->last_write_req));
+	ret = i915_gem_check_olr(obj->last_write_req);
 	if (ret)
 		return ret;
 
-- 
1.7.9.5

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