drm/exynos: added new funtion to get/put dma address.

[deliverable/linux.git] / drivers / gpu / drm / exynos / exynos_drm_gem.c

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index 730093fed51250cdec9769093296a7c1a0e29141..b5c6f3cfc698decacfb053703262ebf40b9179ea 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -386,6 +386,64 @@ int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
        return 0;
 }
 
+void *exynos_drm_gem_get_dma_addr(struct drm_device *dev,
+                                       unsigned int gem_handle,
+                                       struct drm_file *file_priv)
+{
+       struct exynos_drm_gem_obj *exynos_gem_obj;
+       struct drm_gem_object *obj;
+
+       obj = drm_gem_object_lookup(dev, file_priv, gem_handle);
+       if (!obj) {
+               DRM_ERROR("failed to lookup gem object.\n");
+               return ERR_PTR(-EINVAL);
+       }
+
+       exynos_gem_obj = to_exynos_gem_obj(obj);
+
+       if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) {
+               DRM_DEBUG_KMS("not support NONCONTIG type.\n");
+               drm_gem_object_unreference_unlocked(obj);
+
+               /* TODO */
+               return ERR_PTR(-EINVAL);
+       }
+
+       return &exynos_gem_obj->buffer->dma_addr;
+}
+
+void exynos_drm_gem_put_dma_addr(struct drm_device *dev,
+                                       unsigned int gem_handle,
+                                       struct drm_file *file_priv)
+{
+       struct exynos_drm_gem_obj *exynos_gem_obj;
+       struct drm_gem_object *obj;
+
+       obj = drm_gem_object_lookup(dev, file_priv, gem_handle);
+       if (!obj) {
+               DRM_ERROR("failed to lookup gem object.\n");
+               return;
+       }
+
+       exynos_gem_obj = to_exynos_gem_obj(obj);
+
+       if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG) {
+               DRM_DEBUG_KMS("not support NONCONTIG type.\n");
+               drm_gem_object_unreference_unlocked(obj);
+
+               /* TODO */
+               return;
+       }
+
+       drm_gem_object_unreference_unlocked(obj);
+
+       /*
+        * decrease obj->refcount one more time because we has already
+        * increased it at exynos_drm_gem_get_dma_addr().
+        */
+       drm_gem_object_unreference_unlocked(obj);
+}
+
 int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
                                    struct drm_file *file_priv)
 {