[PATCH v4 09/17] drm/ttm: add drm_gem_ttm_mmap()

[Gerd Hoffmann <kraxel@redhat.com>]

Add helper function to mmap ttm bo's via drm_gem_object_funcs->mmap().

Note that with this code path access verification is done by
drm_gem_mmap() and ttm_bo_driver.verify_access() is not used.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/drm/drm_gem_ttm_helper.h     |  2 ++
 drivers/gpu/drm/drm_gem_ttm_helper.c | 11 +++++++++++
 2 files changed, 13 insertions(+)

diff --git a/include/drm/drm_gem_ttm_helper.h b/include/drm/drm_gem_ttm_helper.h
index 43c9db3583cc..0de3f41a37f4 100644
--- a/include/drm/drm_gem_ttm_helper.h
+++ b/include/drm/drm_gem_ttm_helper.h
@@ -26,5 +26,7 @@ int drm_gem_ttm_bo_device_init(struct drm_device *dev,
 			       struct ttm_bo_device *bdev,
 			       struct ttm_bo_driver *driver,
 			       bool need_dma32);
+int drm_gem_ttm_mmap(struct drm_gem_object *gem,
+		     struct vm_area_struct *vma);
 
 #endif
diff --git a/drivers/gpu/drm/drm_gem_ttm_helper.c b/drivers/gpu/drm/drm_gem_ttm_helper.c
index 0c57e9fd50b9..fabeced8ccf2 100644
--- a/drivers/gpu/drm/drm_gem_ttm_helper.c
+++ b/drivers/gpu/drm/drm_gem_ttm_helper.c
@@ -34,3 +34,14 @@ int drm_gem_ttm_bo_device_init(struct drm_device *dev,
 						   need_dma32);
 }
 EXPORT_SYMBOL(drm_gem_ttm_bo_device_init);
+
+int drm_gem_ttm_mmap(struct drm_gem_object *gem,
+		     struct vm_area_struct *vma)
+{
+	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
+
+	ttm_bo_get(bo);
+	ttm_bo_mmap_vma_setup(bo, vma);
+	return 0;
+}
+EXPORT_SYMBOL(drm_gem_ttm_mmap);
-- 
2.18.1