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path: root/drivers/gpu/drm
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-rw-r--r--drivers/gpu/drm/tegra/gem.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index 8fc5860ab19a..8b0b4ff64bb4 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -568,6 +568,34 @@ static void tegra_gem_prime_release(struct dma_buf *buf)
drm_gem_dmabuf_release(buf);
}
+static int tegra_gem_prime_begin_cpu_access(struct dma_buf *buf,
+ enum dma_data_direction direction)
+{
+ struct drm_gem_object *gem = buf->priv;
+ struct tegra_bo *bo = to_tegra_bo(gem);
+ struct drm_device *drm = gem->dev;
+
+ if (bo->pages)
+ dma_sync_sg_for_cpu(drm->dev, bo->sgt->sgl, bo->sgt->nents,
+ DMA_FROM_DEVICE);
+
+ return 0;
+}
+
+static int tegra_gem_prime_end_cpu_access(struct dma_buf *buf,
+ enum dma_data_direction direction)
+{
+ struct drm_gem_object *gem = buf->priv;
+ struct tegra_bo *bo = to_tegra_bo(gem);
+ struct drm_device *drm = gem->dev;
+
+ if (bo->pages)
+ dma_sync_sg_for_device(drm->dev, bo->sgt->sgl, bo->sgt->nents,
+ DMA_TO_DEVICE);
+
+ return 0;
+}
+
static void *tegra_gem_prime_kmap_atomic(struct dma_buf *buf,
unsigned long page)
{
@@ -618,6 +646,8 @@ static const struct dma_buf_ops tegra_gem_prime_dmabuf_ops = {
.map_dma_buf = tegra_gem_prime_map_dma_buf,
.unmap_dma_buf = tegra_gem_prime_unmap_dma_buf,
.release = tegra_gem_prime_release,
+ .begin_cpu_access = tegra_gem_prime_begin_cpu_access,
+ .end_cpu_access = tegra_gem_prime_end_cpu_access,
.map_atomic = tegra_gem_prime_kmap_atomic,
.unmap_atomic = tegra_gem_prime_kunmap_atomic,
.map = tegra_gem_prime_kmap,