The provided helpers can be used for the respective callback functions
in |struct ttm_bo_driver|.
Signed-off-by: Thomas Zimmermann <tzimmerm...@suse.de>
---
drivers/gpu/drm/drm_gem_ttm_helper.c | 39 ++++++++++++++++++++++++++++
include/drm/drm_gem_ttm_helper.h | 10 +++++++
2 files changed, 49 insertions(+)
diff --git a/drivers/gpu/drm/drm_gem_ttm_helper.c
b/drivers/gpu/drm/drm_gem_ttm_helper.c
index d52d3c439917..af3487137822 100644
--- a/drivers/gpu/drm/drm_gem_ttm_helper.c
+++ b/drivers/gpu/drm/drm_gem_ttm_helper.c
@@ -365,3 +365,42 @@ bool drm_is_gem_ttm(struct ttm_buffer_object *bo)
return (bo->destroy == ttm_buffer_object_destroy);
}
EXPORT_SYMBOL(drm_is_gem_ttm);
+
+/*
+ * Helpers for struct ttm_bo_driver
+ */
+
+/**
+ * drm_gem_ttm_bo_driver_evict_flags - \
+ Implements struct ttm_bo_driver.evict_flags
+ */
+void drm_gem_ttm_bo_driver_evict_flags(struct ttm_buffer_object *bo,
+ struct ttm_placement *pl)
+{
+ struct drm_gem_ttm_object *gbo;
+
+ /* TODO: This test used to be performed by drivers, but can
+ * this actually happen? If so, should we put the check into
+ * drm_gem_ttm_of_gem()? */
+ if (!drm_is_gem_ttm(bo))
+ return;
+
+ gbo = drm_gem_ttm_of_bo(bo);
+ drm_gem_ttm_placement(gbo, TTM_PL_FLAG_SYSTEM);
+ *pl = gbo->placement;
+}
+EXPORT_SYMBOL(drm_gem_ttm_bo_driver_evict_flags);
+
+/**
+ * drm_gem_ttm_bo_driver_verify_access - \
+ Implements struct ttm_bo_driver.verify_access
+ */
+int drm_gem_ttm_bo_driver_verify_access(struct ttm_buffer_object *bo,
+ struct file *filp)
+{
+ struct drm_gem_ttm_object *gbo = drm_gem_ttm_of_bo(bo);
+
+ return drm_vma_node_verify_access(&gbo->gem.vma_node,
+ filp->private_data);
+}
+EXPORT_SYMBOL(drm_gem_ttm_bo_driver_verify_access);
diff --git a/include/drm/drm_gem_ttm_helper.h b/include/drm/drm_gem_ttm_helper.h
index 662dcb8d4770..c1c4bd757f4b 100644
--- a/include/drm/drm_gem_ttm_helper.h
+++ b/include/drm/drm_gem_ttm_helper.h
@@ -88,4 +88,14 @@ void drm_gem_ttm_kunmap(struct drm_gem_ttm_object *gbo);
bool drm_is_gem_ttm(struct ttm_buffer_object *bo);
+/*
+ * Helpers for struct ttm_bo_driver
+ */
+
+void drm_gem_ttm_bo_driver_evict_flags(struct ttm_buffer_object *bo,
+ struct ttm_placement *pl);
+
+int drm_gem_ttm_bo_driver_verify_access(struct ttm_buffer_object *bo,
+ struct file *filp);
+
#endif
--
2.21.0
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