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Subject[PATCH 1/6] drm/ttm: add gem base object
Date
Add drm_gem_object struct to ttm_buffer_object, so ttm objects are a gdm
object superclass. Add a function to check whenever a given bo actually
uses the embedded drm_gem_object, for the transition period.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
include/drm/ttm/ttm_bo_api.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 49d9cdfc58f2..72f6aeda619c 100644
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -31,6 +31,7 @@
#ifndef _TTM_BO_API_H_
#define _TTM_BO_API_H_

+#include <drm/drm_gem.h>
#include <drm/drm_hashtab.h>
#include <drm/drm_vma_manager.h>
#include <linux/kref.h>
@@ -127,6 +128,7 @@ struct ttm_tt;
/**
* struct ttm_buffer_object
*
+ * @base: drm_gem_object superclass data.
* @bdev: Pointer to the buffer object device structure.
* @type: The bo type.
* @destroy: Destruction function. If NULL, kfree is used.
@@ -169,6 +171,8 @@ struct ttm_tt;
*/

struct ttm_buffer_object {
+ struct drm_gem_object base;
+
/**
* Members constant at init.
*/
@@ -768,4 +772,18 @@ int ttm_bo_swapout(struct ttm_bo_global *glob,
struct ttm_operation_ctx *ctx);
void ttm_bo_swapout_all(struct ttm_bo_device *bdev);
int ttm_bo_wait_unreserved(struct ttm_buffer_object *bo);
+
+/**
+ * ttm_bo_uses_embedded_gem_object - check if the given bo uses the
+ * embedded drm_gem_object.
+ *
+ * Helper for the transition period, once all drivers are switched to
+ * use the embedded drm_gem_object this can go away.
+ *
+ * @bo: The bo to check.
+ */
+static inline bool ttm_bo_uses_embedded_gem_object(struct ttm_buffer_object *bo)
+{
+ return bo->base.dev != NULL;
+}
#endif
--
2.18.1
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