drm/exynos: update gem and buffer framework.

with this patch, we can allocate physically continuous or non-continuous
memory and also it creates scatterlist for iommu support so allocated
memory region can be mapped to iommu page table using scatterlist.

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>

1 files changed, 16 insertions, 6 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_buf.h b/drivers/gpu/drm/exynos/exynos_drm_buf.h
index c913f2bad760..3388e4eb4ba2 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_buf.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_buf.h
@@ -26,12 +26,22 @@
 #ifndef _EXYNOS_DRM_BUF_H_
 #define _EXYNOS_DRM_BUF_H_
 
-/* allocate physical memory. */
-struct exynos_drm_gem_buf *exynos_drm_buf_create(struct drm_device *dev,
-                unsigned int size);
+/* create and initialize buffer object. */
+struct exynos_drm_gem_buf *exynos_drm_init_buf(struct drm_device *dev,
+                                                unsigned int size);
 
-/* remove allocated physical memory. */
-void exynos_drm_buf_destroy(struct drm_device *dev,
-                struct exynos_drm_gem_buf *buffer);
+/* destroy buffer object. */
+void exynos_drm_fini_buf(struct drm_device *dev,
+                                struct exynos_drm_gem_buf *buffer);
+
+/* allocate physical memory region and setup sgt and pages. */
+int exynos_drm_alloc_buf(struct drm_device *dev,
+                                struct exynos_drm_gem_buf *buf,
+                                unsigned int flags);
+
+/* release physical memory region, sgt and pages. */
+void exynos_drm_free_buf(struct drm_device *dev,
+                                unsigned int flags,
+                                struct exynos_drm_gem_buf *buffer);
 
 #endif