1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/gpu/drm/xen/xen_drm_front_gem_cma.c b/drivers/gpu/drm/xen/xen_drm_front_gem_cma.c
new file mode 100644
index 000000000000..ba30a4bc2a39
--- /dev/null
+++ b/drivers/gpu/drm/xen/xen_drm_front_gem_cma.c
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+
+/*
+ *  Xen para-virtual DRM device
+ *
+ * Copyright (C) 2016-2018 EPAM Systems Inc.
+ *
+ * Author: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+
+#include "xen_drm_front.h"
+#include "xen_drm_front_gem.h"
+
+struct drm_gem_object *
+xen_drm_front_gem_import_sg_table(struct drm_device *dev,
+				  struct dma_buf_attachment *attach,
+				  struct sg_table *sgt)
+{
+	struct xen_drm_front_drm_info *drm_info = dev->dev_private;
+	struct drm_gem_object *gem_obj;
+	struct drm_gem_cma_object *cma_obj;
+	int ret;
+
+	gem_obj = drm_gem_cma_prime_import_sg_table(dev, attach, sgt);
+	if (IS_ERR_OR_NULL(gem_obj))
+		return gem_obj;
+
+	cma_obj = to_drm_gem_cma_obj(gem_obj);
+
+	ret = xen_drm_front_dbuf_create_from_sgt(drm_info->front_info,
+						 xen_drm_front_dbuf_to_cookie(gem_obj),
+						 0, 0, 0, gem_obj->size,
+						 drm_gem_cma_prime_get_sg_table(gem_obj));
+	if (ret < 0)
+		return ERR_PTR(ret);
+
+	DRM_DEBUG("Imported CMA buffer of size %zu\n", gem_obj->size);
+
+	return gem_obj;
+}
+
+struct sg_table *xen_drm_front_gem_get_sg_table(struct drm_gem_object *gem_obj)
+{
+	return drm_gem_cma_prime_get_sg_table(gem_obj);
+}
+
+struct drm_gem_object *xen_drm_front_gem_create(struct drm_device *dev,
+						size_t size)
+{
+	struct xen_drm_front_drm_info *drm_info = dev->dev_private;
+	struct drm_gem_cma_object *cma_obj;
+
+	if (drm_info->front_info->cfg.be_alloc) {
+		/* This use-case is not yet supported and probably won't be */
+		DRM_ERROR("Backend allocated buffers and CMA helpers are not supported at the same time\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	cma_obj = drm_gem_cma_create(dev, size);
+	if (IS_ERR_OR_NULL(cma_obj))
+		return ERR_CAST(cma_obj);
+
+	return &cma_obj->base;
+}
+
+void xen_drm_front_gem_free_object_unlocked(struct drm_gem_object *gem_obj)
+{
+	drm_gem_cma_free_object(gem_obj);
+}
+
+struct page **xen_drm_front_gem_get_pages(struct drm_gem_object *gem_obj)
+{
+	return NULL;
+}