drm/i915: Remove the pipelined parameter from get_fence()

We never succeeded in getting pipelined fencing to work (unresolved
spurious GPU hangs), so begin the process of dismantling and removal
the broken code.

Step 1 is the removal of the pipeline parameter to get_fence().
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_drv.h

@@ -1257,8 +1257,7 @@ i915_seqno_passed(uint32_t seq1, uint32_t seq2)
 
 u32 i915_gem_next_request_seqno(struct intel_ring_buffer *ring);
 
-int __must_check i915_gem_object_get_fence(struct drm_i915_gem_object *obj,
-					   struct intel_ring_buffer *pipelined);
+int __must_check i915_gem_object_get_fence(struct drm_i915_gem_object *obj);
 int __must_check i915_gem_object_put_fence(struct drm_i915_gem_object *obj);
 
 static inline bool

drivers/gpu/drm/i915/i915_gem.c

@@ -1079,7 +1079,7 @@ int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 	if (!obj->has_global_gtt_mapping)
 		i915_gem_gtt_bind_object(obj, obj->cache_level);
 
-	ret = i915_gem_object_get_fence(obj, NULL);
+	ret = i915_gem_object_get_fence(obj);
 	if (ret)
 		goto unlock;
 
@@ -2453,7 +2453,6 @@ i915_find_fence_reg(struct drm_device *dev,
 /**
  * i915_gem_object_get_fence - set up fencing for an object
  * @obj: object to map through a fence reg
- * @pipelined: ring on which to queue the change, or NULL for CPU access
  *
  * When mapping objects through the GTT, userspace wants to be able to write
  * to them without having to worry about swizzling if the object is tiled.
@@ -2466,11 +2465,11 @@ i915_find_fence_reg(struct drm_device *dev,
  * For an untiled surface, this removes any existing fence.
  */
 int
-i915_gem_object_get_fence(struct drm_i915_gem_object *obj,
-			  struct intel_ring_buffer *pipelined)
+i915_gem_object_get_fence(struct drm_i915_gem_object *obj)
 {
 	struct drm_device *dev = obj->base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_ring_buffer *pipelined;
 	struct drm_i915_fence_reg *reg;
 	int ret;
 

drivers/gpu/drm/i915/i915_gem_execbuffer.c

@@ -534,7 +534,7 @@ pin_and_fence_object(struct drm_i915_gem_object *obj,
 
 	if (has_fenced_gpu_access) {
 		if (entry->flags & EXEC_OBJECT_NEEDS_FENCE) {
-			ret = i915_gem_object_get_fence(obj, ring);
+			ret = i915_gem_object_get_fence(obj);
 			if (ret)
 				goto err_unpin;
 

drivers/gpu/drm/i915/intel_display.c

@@ -2151,7 +2151,7 @@ intel_pin_and_fence_fb_obj(struct drm_device *dev,
 	 * framebuffer compression.  For simplicity, we always install
 	 * a fence as the cost is not that onerous.
 	 */
-	ret = i915_gem_object_get_fence(obj, pipelined);
+	ret = i915_gem_object_get_fence(obj);
 	if (ret)
 		goto err_unpin;