1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
new file mode 100644
index 000000000000..77f075075db2
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Hisilicon Hibmc SoC drm driver
+ *
+ * Based on the bochs drm driver.
+ *
+ * Copyright (c) 2016 Huawei Limited.
+ *
+ * Author:
+ *	Rongrong Zou <zourongrong@huawei.com>
+ *	Rongrong Zou <zourongrong@gmail.com>
+ *	Jianhua Li <lijianhua@huawei.com>
+ */
+
+#include <linux/pci.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_gem_vram_helper.h>
+#include <drm/drm_print.h>
+
+#include "hibmc_drm_drv.h"
+
+int hibmc_mm_init(struct hibmc_drm_private *hibmc)
+{
+	struct drm_vram_mm *vmm;
+	int ret;
+	struct drm_device *dev = hibmc->dev;
+	struct pci_dev *pdev = to_pci_dev(dev->dev);
+
+	vmm = drm_vram_helper_alloc_mm(dev, pci_resource_start(pdev, 0),
+				       hibmc->fb_size);
+	if (IS_ERR(vmm)) {
+		ret = PTR_ERR(vmm);
+		drm_err(dev, "Error initializing VRAM MM; %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+void hibmc_mm_fini(struct hibmc_drm_private *hibmc)
+{
+	if (!hibmc->dev->vram_mm)
+		return;
+
+	drm_vram_helper_release_mm(hibmc->dev);
+}
+
+int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
+		      struct drm_mode_create_dumb *args)
+{
+	return drm_gem_vram_fill_create_dumb(file, dev, 0, 128, args);
+}
+
+const struct drm_mode_config_funcs hibmc_mode_funcs = {
+	.mode_valid = drm_vram_helper_mode_valid,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+	.fb_create = drm_gem_fb_create,
+};