1 files changed, 25 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
index fabb01e8c8d5..3db18f42c5c9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
@@ -47,9 +47,33 @@
  * that the the relevant GPU caches have been flushed.
  */
 
+struct amdgpu_fence {
+        struct fence base;
+
+        /* RB, DMA, etc. */
+        struct amdgpu_ring              *ring;
+        uint64_t                        seq;
+
+        wait_queue_t                    fence_wake;
+};
+
 static struct kmem_cache *amdgpu_fence_slab;
 static atomic_t amdgpu_fence_slab_ref = ATOMIC_INIT(0);
 
+/*
+ * Cast helper
+ */
+static const struct fence_ops amdgpu_fence_ops;
+static inline struct amdgpu_fence *to_amdgpu_fence(struct fence *f)
+{
+        struct amdgpu_fence *__f = container_of(f, struct amdgpu_fence, base);
+
+        if (__f->base.ops == &amdgpu_fence_ops)
+                return __f;
+
+        return NULL;
+}
+
 /**
  * amdgpu_fence_write - write a fence value
  *
@@ -663,7 +687,7 @@ static void amdgpu_fence_release(struct fence *f)
         kmem_cache_free(amdgpu_fence_slab, fence);
 }
 
-const struct fence_ops amdgpu_fence_ops = {
+static const struct fence_ops amdgpu_fence_ops = {
         .get_driver_name = amdgpu_fence_get_driver_name,
         .get_timeline_name = amdgpu_fence_get_timeline_name,
         .enable_signaling = amdgpu_fence_enable_signaling,