From a4f19aaab3e69f9d15cc995e3378d27c8ef4f780 Mon Sep 17 00:00:00 2001
From: Inki Dae <inki.dae@samsung.com>
Date: Mon, 11 Mar 2013 21:15:59 +0900
Subject: [PATCH] drm/exynos: Add a new function to get gem buffer size
This patch adds a new function to get gem buffer size. And this
funtion could be used for g2d driver or others can get gem buffer
size to check if the buffer is valid or not.
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <inki.dae@samsung.com>
---
drivers/gpu/drm/exynos/exynos_drm_gem.c | 21 +++++++++++++++++++++
drivers/gpu/drm/exynos/exynos_drm_gem.h | 5 +++++
2 files changed, 26 insertions(+)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index 67e17ce112b69..0e6fe000578c0 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -164,6 +164,27 @@ out:
exynos_gem_obj = NULL;
}
+unsigned long exynos_drm_gem_get_size(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 0;
+ }
+
+ exynos_gem_obj = to_exynos_gem_obj(obj);
+
+ drm_gem_object_unreference_unlocked(obj);
+
+ return exynos_gem_obj->buffer->size;
+}
+
+
struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev,
unsigned long size)
{
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h
index 35ebac47dc2ba..468766bee4508 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h
@@ -130,6 +130,11 @@ int exynos_drm_gem_userptr_ioctl(struct drm_device *dev, void *data,
int exynos_drm_gem_get_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
+/* get buffer size to gem handle. */
+unsigned long exynos_drm_gem_get_size(struct drm_device *dev,
+ unsigned int gem_handle,
+ struct drm_file *file_priv);
+
/* initialize gem object. */
int exynos_drm_gem_init_object(struct drm_gem_object *obj);
--
2.39.5