This notifies the driver that a BO is about to be released.
Releasing a BO also invokes the move_notify callback from
ttm_bo_cleanup_memtype_use, but that happens too late for anything
that would add fences to the BO and require a delayed delete.
Signed-off-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
---
drivers/gpu/drm/ttm/ttm_bo.c | 3 +++
include/drm/ttm/ttm_bo_driver.h | 10 ++++++++++
2 files changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 58c403eda04e..2070e8a57ed8 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -671,6 +671,9 @@ static void ttm_bo_release(struct kref *kref)
struct ttm_bo_device *bdev = bo->bdev;
struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
+ if (bo->bdev->driver->release_notify)
+ bo->bdev->driver->release_notify(bo);
+
drm_vma_offset_remove(&bdev->vma_manager, &bo->vma_node);
ttm_mem_io_lock(man, false);
ttm_mem_io_free_vm(bo);
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index c9b8ba492f24..d69121c43e58 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -390,6 +390,16 @@ struct ttm_bo_driver {
* notify driver that a BO was deleted from LRU.
*/
void (*del_from_lru_notify)(struct ttm_buffer_object *bo);
+
+ /**
+ * Notify the driver that we're about to release a BO
+ *
+ * @bo: BO that is about to be released
+ *
+ * Gives the driver a chance to do any cleanup, including
+ * adding fences that may force a delayed delete
+ */
+ void (*release_notify)(struct ttm_buffer_object *bo);
};
/**
--
2.17.1
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