drm/exynos: added new funtion to get/put dma address.
this function would be used for drm based 2d acceleration driver
to get/put dma address through gem handle.
when exynos_drm_get_dma_address is called reference count of
gem object would be increased not to be released by gem close and
when exynos_drm_put_dma_address is called the reference count of
this gem object would be decreased to be released.
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index 730093f..b5c6f3c 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -386,6 +386,64 @@
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)
{
