[PATCH 3/6] drm/nouveau: hook up cache sync functions

[Lucas Stach <dev-8ppwABl0HbeELgA04lAiVw@public.gmane.org>]

Signed-off-by: Lucas Stach <dev-8ppwABl0HbeELgA04lAiVw@public.gmane.org>
---
 drivers/gpu/drm/nouveau/nouveau_bo.c  | 4 ++++
 drivers/gpu/drm/nouveau/nouveau_gem.c | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index af20fba..f4a2eb9 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -411,6 +411,10 @@ nouveau_bo_validate(struct nouveau_bo *nvbo, bool interruptible,
 {
 	int ret;
 
+	if (nvbo->bo.ttm && nvbo->bo.ttm->caching_state == tt_cached)
+		ttm_dma_tt_cache_sync_for_device((struct ttm_dma_tt *)nvbo->bo.ttm,
+			&nouveau_bdev(nvbo->bo.ttm->bdev)->dev->pdev->dev);
+
 	ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement,
 			      interruptible, no_wait_gpu);
 	if (ret)
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c
index 830cb7b..f632b92 100644
--- a/drivers/gpu/drm/nouveau/nouveau_gem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_gem.c
@@ -901,6 +901,11 @@ nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
 	ret = ttm_bo_wait(&nvbo->bo, true, true, no_wait);
 	spin_unlock(&nvbo->bo.bdev->fence_lock);
 	drm_gem_object_unreference_unlocked(gem);
+
+	if (!ret && nvbo->bo.ttm && nvbo->bo.ttm->caching_state == tt_cached)
+		ttm_dma_tt_cache_sync_for_cpu((struct ttm_dma_tt *)nvbo->bo.ttm,
+					      &dev->pdev->dev);
+
 	return ret;
 }
 
-- 
1.8.3.1