drm/ttm/agp: export bind/unbind/destroy for drivers to use.

Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200907204630.1406528-5-airlied@gmail.com

drivers/gpu/drm/ttm/ttm_agp_backend.c

@@ -48,8 +48,8 @@ struct ttm_agp_backend {
 	struct agp_bridge_data *bridge;
 };
 
-static int ttm_agp_bind(struct ttm_bo_device *bdev,
-			struct ttm_tt *ttm, struct ttm_resource *bo_mem)
+int ttm_agp_bind(struct ttm_bo_device *bdev,
+		 struct ttm_tt *ttm, struct ttm_resource *bo_mem)
 {
 	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
 	struct page *dummy_read_page = ttm_bo_glob.dummy_read_page;
@@ -82,9 +82,10 @@ static int ttm_agp_bind(struct ttm_bo_device *bdev,
 
 	return ret;
 }
+EXPORT_SYMBOL(ttm_agp_bind);
 
-static void ttm_agp_unbind(struct ttm_bo_device *bdev,
-			   struct ttm_tt *ttm)
+void ttm_agp_unbind(struct ttm_bo_device *bdev,
+		    struct ttm_tt *ttm)
 {
 	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
 
@@ -97,9 +98,10 @@ static void ttm_agp_unbind(struct ttm_bo_device *bdev,
 		agp_be->mem = NULL;
 	}
 }
+EXPORT_SYMBOL(ttm_agp_unbind);
 
-static void ttm_agp_destroy(struct ttm_bo_device *bdev,
-			    struct ttm_tt *ttm)
+void ttm_agp_destroy(struct ttm_bo_device *bdev,
+		     struct ttm_tt *ttm)
 {
 	struct ttm_agp_backend *agp_be = container_of(ttm, struct ttm_agp_backend, ttm);
 
@@ -108,6 +110,7 @@ static void ttm_agp_destroy(struct ttm_bo_device *bdev,
 	ttm_tt_fini(ttm);
 	kfree(agp_be);
 }
+EXPORT_SYMBOL(ttm_agp_destroy);
 
 static struct ttm_backend_func ttm_agp_func = {
 	.bind = ttm_agp_bind,

include/drm/ttm/ttm_tt.h

@@ -266,6 +266,12 @@ struct ttm_tt *ttm_agp_tt_create(struct ttm_buffer_object *bo,
 				 uint32_t page_flags);
 int ttm_agp_tt_populate(struct ttm_bo_device *bdev, struct ttm_tt *ttm, struct ttm_operation_ctx *ctx);
 void ttm_agp_tt_unpopulate(struct ttm_bo_device *bdev, struct ttm_tt *ttm);
+int ttm_agp_bind(struct ttm_bo_device *bdev,
+		 struct ttm_tt *ttm, struct ttm_resource *bo_mem);
+void ttm_agp_unbind(struct ttm_bo_device *bdev,
+		    struct ttm_tt *ttm);
+void ttm_agp_destroy(struct ttm_bo_device *bdev,
+		     struct ttm_tt *ttm);
 #endif
 
 #endif