[PATCH 1/3] drm/amdgpu: extract a helper to import dmabuf more flexibly

[Lang Yu <Lang.Yu@amd.com>]

For clients(e.g., kfd) who want to determine whether to
create a buffer object by themselves especially when
importing a gfx BO based dmabuf.

Signed-off-by: Lang Yu <Lang.Yu@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 38 +++++++++++++--------
 drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h |  2 ++
 2 files changed, 25 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
index 579adfafe4d0..83bbf54d5562 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
@@ -429,6 +429,28 @@ static const struct dma_buf_attach_ops amdgpu_dma_buf_attach_ops = {
 	.move_notify = amdgpu_dma_buf_move_notify
 };
 
+struct drm_gem_object *
+amdgpu_dma_buf_create_obj_and_attach(struct drm_device *dev, struct dma_buf *dma_buf)
+{
+	struct dma_buf_attachment *attach;
+	struct drm_gem_object *obj;
+
+	obj = amdgpu_dma_buf_create_obj(dev, dma_buf);
+	if (IS_ERR(obj))
+		return obj;
+
+	attach = dma_buf_dynamic_attach(dma_buf, dev->dev,
+					&amdgpu_dma_buf_attach_ops, obj);
+	if (IS_ERR(attach)) {
+		drm_gem_object_put(obj);
+		return ERR_CAST(attach);
+	}
+
+	get_dma_buf(dma_buf);
+	obj->import_attach = attach;
+	return obj;
+}
+
 /**
  * amdgpu_gem_prime_import - &drm_driver.gem_prime_import implementation
  * @dev: DRM device
@@ -442,7 +464,6 @@ static const struct dma_buf_attach_ops amdgpu_dma_buf_attach_ops = {
 struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev,
 					       struct dma_buf *dma_buf)
 {
-	struct dma_buf_attachment *attach;
 	struct drm_gem_object *obj;
 
 	if (dma_buf->ops == &amdgpu_dmabuf_ops) {
@@ -457,20 +478,7 @@ struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev,
 		}
 	}
 
-	obj = amdgpu_dma_buf_create_obj(dev, dma_buf);
-	if (IS_ERR(obj))
-		return obj;
-
-	attach = dma_buf_dynamic_attach(dma_buf, dev->dev,
-					&amdgpu_dma_buf_attach_ops, obj);
-	if (IS_ERR(attach)) {
-		drm_gem_object_put(obj);
-		return ERR_CAST(attach);
-	}
-
-	get_dma_buf(dma_buf);
-	obj->import_attach = attach;
-	return obj;
+	return amdgpu_dma_buf_create_obj_and_attach(dev, dma_buf);
 }
 
 /**
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h
index 3e93b9b407a9..3b89e3af7c06 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.h
@@ -27,6 +27,8 @@
 
 struct dma_buf *amdgpu_gem_prime_export(struct drm_gem_object *gobj,
 					int flags);
+struct drm_gem_object*
+amdgpu_dma_buf_create_obj_and_attach(struct drm_device *dev, struct dma_buf *dma_buf);
 struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev,
 					    struct dma_buf *dma_buf);
 bool amdgpu_dmabuf_is_xgmi_accessible(struct amdgpu_device *adev,
-- 
2.25.1