drm/nouveau: Implement the pageflip ioctl.

nv0x-nv4x should be mostly fine, nv50 doesn't work yet.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index c09928322eb9..cdc8f544d47f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -942,6 +942,18 @@ nouveau_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
         return ttm_bo_validate(bo, &nvbo->placement, false, true, false);
 }
 
+void
+nouveau_bo_fence(struct nouveau_bo *nvbo, struct nouveau_fence *fence)
+{
+        spin_lock(&nvbo->bo.bdev->fence_lock);
+        __nouveau_fence_unref(&nvbo->bo.sync_obj);
+
+        if (likely(fence))
+                nvbo->bo.sync_obj = nouveau_fence_ref(fence);
+
+        spin_unlock(&nvbo->bo.bdev->fence_lock);
+}
+
 struct ttm_bo_driver nouveau_bo_driver = {
         .create_ttm_backend_entry = nouveau_bo_create_ttm_backend_entry,
         .invalidate_caches = nouveau_bo_invalidate_caches,