Used to dynamically adjust priorities of buffers at runtime, to react to
changes in memory pressure/usage patterns.
Signed-off-by: Friedrich Vock <friedrich.vock@xxxxxx>
---
drivers/gpu/drm/ttm/ttm_bo.c | 17 +++++++++++++++++
include/drm/ttm/ttm_bo.h | 2 ++
2 files changed, 19 insertions(+)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index eae54cd4a7ce9..6ac939c58a6b8 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -112,6 +112,23 @@ void ttm_bo_set_bulk_move(struct ttm_buffer_object *bo,
}
EXPORT_SYMBOL(ttm_bo_set_bulk_move);
+void ttm_bo_update_priority(struct ttm_buffer_object *bo, unsigned int new_prio)
+{
+ struct ttm_resource_manager *man;
+
+ if (!bo->resource)
+ return;
+
+ man = ttm_manager_type(bo->bdev, bo->resource->mem_type);
+
+ spin_lock(&bo->bdev->lru_lock);
+ ttm_resource_del_bulk_move(bo->resource, bo);
+ bo->priority = new_prio;
+ ttm_resource_add_bulk_move(bo->resource, bo);
+ spin_unlock(&bo->bdev->lru_lock);
+}
+EXPORT_SYMBOL(ttm_bo_update_priority);
+
static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
struct ttm_resource *mem, bool evict,
struct ttm_operation_ctx *ctx,
diff --git a/include/drm/ttm/ttm_bo.h b/include/drm/ttm/ttm_bo.h
index 91299a3b6fcfa..51040bc443ea0 100644
--- a/include/drm/ttm/ttm_bo.h
+++ b/include/drm/ttm/ttm_bo.h
@@ -359,6 +359,8 @@ static inline void *ttm_kmap_obj_virtual(struct ttm_bo_kmap_obj *map,
return map->virtual;
}
+void ttm_bo_update_priority(struct ttm_buffer_object *bo,
+ unsigned int new_prio);
int ttm_bo_wait_ctx(struct ttm_buffer_object *bo,
struct ttm_operation_ctx *ctx);
--
2.44.0
