[PATCH v4 06/19] drm: Add default instance for VRAM MM callback functions

Thomas Zimmermann
Mon, 06 May 2019 08:26:36 -0000

VRAM MM is most likely be used with GEM VRAM. The latter now provides the
required instance of struct drm_vram_mm_funcs for drivers to use.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/gpu/drm/drm_gem_vram_helper.c | 14 ++++++++++++++
 include/drm/drm_gem_vram_helper.h     |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/drivers/gpu/drm/drm_gem_vram_helper.c
b/drivers/gpu/drm/drm_gem_vram_helper.c
index 461ed20b779b..33321291475a 100644
--- a/drivers/gpu/drm/drm_gem_vram_helper.c
+++ b/drivers/gpu/drm/drm_gem_vram_helper.c
@@ -2,6 +2,7 @@

 #include <drm/drm_gem_vram_helper.h>
 #include <drm/drm_mode.h>
+#include <drm/drm_vram_mm_helper.h>
 #include <drm/ttm/ttm_page_alloc.h>

 /**
@@ -523,6 +524,19 @@ int drm_gem_vram_bo_driver_verify_access(struct
ttm_buffer_object *bo,
 }
 EXPORT_SYMBOL(drm_gem_vram_bo_driver_verify_access);

+/**
+ * drm_gem_vram_mm_funcs - Functions for &struct drm_vram_mm
+ *
+ * Most users of @struct drm_gem_vram_object will also use
+ * @struct drm_vram_mm. This instance of &struct drm_vram_mm_funcs
+ * can be used to connect both.
+ */
+const struct drm_vram_mm_funcs drm_gem_vram_mm_funcs = {
+	.evict_flags = drm_gem_vram_bo_driver_evict_flags,
+	.verify_access = drm_gem_vram_bo_driver_verify_access
+};
+EXPORT_SYMBOL(drm_gem_vram_mm_funcs);
+
 /*
  * Helpers for struct drm_driver
  */
diff --git a/include/drm/drm_gem_vram_helper.h
b/include/drm/drm_gem_vram_helper.h
index 68edb28d4508..f09f1594b4f8 100644
--- a/include/drm/drm_gem_vram_helper.h
+++ b/include/drm/drm_gem_vram_helper.h
@@ -9,6 +9,7 @@
 #include <linux/kernel.h> /* for container_of() */

 struct drm_mode_create_dumb;
+struct drm_vram_mm_funcs;
 struct filp;

 #define DRM_GEM_VRAM_PL_FLAG_VRAM	TTM_PL_FLAG_VRAM
@@ -107,6 +108,8 @@ void drm_gem_vram_bo_driver_evict_flags(struct
ttm_buffer_object *bo,
 int drm_gem_vram_bo_driver_verify_access(struct ttm_buffer_object *bo,
 					 struct file *filp);

+extern const struct drm_vram_mm_funcs drm_gem_vram_mm_funcs;
+
 /*
  * Helpers for struct drm_driver
  */
--
2.21.0