[PATCH 3/5] drm/udl: Add GEM object functions for free(), vmap(), and vunmap()

[Thomas Zimmermann]

Implementing vmap() and vunmap() of struct drm_gem_object_funcs is
required by generic fbdev emulation. Supporting free() is easy as
well. More udl-specific interfaces can probably be replaced by GEM
object functions in later patches.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/gpu/drm/udl/udl_gem.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/drivers/gpu/drm/udl/udl_gem.c b/drivers/gpu/drm/udl/udl_gem.c
index 3ea0cd9ae2d6..6ca097c270d6 100644
--- a/drivers/gpu/drm/udl/udl_gem.c
+++ b/drivers/gpu/drm/udl/udl_gem.c
@@ -11,6 +11,8 @@
 
 #include "udl_drv.h"
 
+static const struct drm_gem_object_funcs udl_gem_object_funcs;
+
 struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
 					    size_t size)
 {
@@ -25,6 +27,7 @@ struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
 		return NULL;
 	}
 
+	obj->base.funcs = &udl_gem_object_funcs;
 	obj->flags = UDL_BO_CACHEABLE;
 	return obj;
 }
@@ -230,3 +233,34 @@ int udl_gem_mmap(struct drm_file *file, struct drm_device *dev,
 	mutex_unlock(&udl->gem_lock);
 	return ret;
 }
+
+/*
+ * Helpers for struct drm_gem_object_funcs
+ */
+
+static void udl_gem_object_free(struct drm_gem_object *obj)
+{
+	udl_gem_free_object(obj);
+}
+
+static void *udl_gem_object_vmap(struct drm_gem_object *obj)
+{
+	struct udl_gem_object *uobj = to_udl_bo(obj);
+	int ret;
+
+	ret = udl_gem_vmap(uobj);
+	if (ret)
+		return ERR_PTR(ret);
+	return uobj->vmapping;
+}
+
+static void udl_gem_object_vunmap(struct drm_gem_object *obj, void *vaddr)
+{
+	return udl_gem_vunmap(to_udl_bo(obj));
+}
+
+static const struct drm_gem_object_funcs udl_gem_object_funcs = {
+	.free	= udl_gem_object_free,
+	.vmap	= udl_gem_object_vmap,
+	.vunmap	= udl_gem_object_vunmap,
+};
-- 
2.23.0