[2/5] drm/ttm: remove the backing store if no placement is given
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Message ID 20200217154509.2265-3-christian.koenig@amd.com
State New
Headers show
Series
  • [1/5] dma-buf: add dynamic DMA-buf handling v14
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Commit Message

Christian König Feb. 17, 2020, 3:45 p.m. UTC
Pipeline removal of the BOs backing store when no placement is given
during validation.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/ttm/ttm_bo.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

Patch
diff mbox series

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 229205e499db..a56cb2a2b4ad 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1225,6 +1225,18 @@  int ttm_bo_validate(struct ttm_buffer_object *bo,
 	uint32_t new_flags;
 
 	dma_resv_assert_held(bo->base.resv);
+
+	/*
+	 * Remove the backing store if no placement is given.
+	 */
+	if (!placement->num_placement && !placement->num_busy_placement) {
+		ret = ttm_bo_pipeline_gutting(bo);
+		if (ret)
+			return ret;
+
+		return ttm_tt_create(bo, false);
+	}
+
 	/*
 	 * Check whether we need to move buffer.
 	 */