1 files changed, 120 insertions, 0 deletions
diff --git a/drivers/gpu/drm/openchrome/ttm_gem.c b/drivers/gpu/drm/openchrome/ttm_gem.c
new file mode 100644
index 000000000000..52dd2c942646
--- /dev/null
+++ b/drivers/gpu/drm/openchrome/ttm_gem.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright 2012 James Simmons <jsimmons@infradead.org>. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) OR COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+#include "drmP.h"
+#include "via_drv.h"
+
+struct ttm_gem_object {
+	struct drm_gem_object gem;
+	struct ttm_heap *heap;
+};
+
+/*
+ * initialize the gem buffer object
+ */
+int ttm_gem_open_object(struct drm_gem_object *obj, struct drm_file *file_priv)
+{
+	return 0;
+}
+
+/*
+ * free the gem buffer object
+ */
+void ttm_gem_free_object(struct drm_gem_object *obj)
+{
+	struct ttm_gem_object *gem = container_of(obj, struct ttm_gem_object, gem);
+
+	if (gem->heap != NULL) {
+		struct ttm_buffer_object *bo = &gem->heap->pbo;
+
+		ttm_bo_unref(&bo);
+		gem->heap = NULL;
+	}
+	drm_gem_object_release(obj);
+	kfree(gem);
+}
+
+struct ttm_buffer_object *
+ttm_gem_mapping(struct drm_gem_object *obj)
+{
+	struct ttm_gem_object *gem;
+
+	gem = container_of(obj, struct ttm_gem_object, gem);
+	if (gem->heap == NULL)
+		return NULL;
+	return &gem->heap->pbo;
+}
+
+/*
+ * file operation mmap
+ */
+int ttm_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+	struct via_device *dev_priv;
+	struct drm_file *file_priv;
+
+	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
+		return -EINVAL;
+
+	file_priv = filp->private_data;
+	dev_priv = file_priv->minor->dev->dev_private;
+	if (!dev_priv)
+		return -EINVAL;
+
+	return ttm_bo_mmap(filp, vma, &dev_priv->bdev);
+}
+
+struct drm_gem_object *
+ttm_gem_create(struct drm_device *dev, struct ttm_bo_device *bdev,
+	       enum ttm_bo_type origin, int types, bool interruptible,
+	       int byte_align, int page_align, unsigned long size)
+{
+	struct ttm_buffer_object *bo = NULL;
+	struct ttm_gem_object *obj;
+	int ret;
+
+	size = round_up(size, byte_align);
+	size = ALIGN(size, page_align);
+
+	ret = via_bo_create(bdev, size, origin, types, byte_align,
+			      page_align, interruptible, NULL, NULL, &bo);
+	if (ret) {
+		DRM_ERROR("Failed to create buffer object\n");
+		return ERR_PTR(ret);
+	}
+
+	obj = kzalloc(sizeof(*obj), GFP_KERNEL);
+	if (!obj) {
+		ttm_bo_unref(&bo);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	ret = drm_gem_object_init(dev, &obj->gem, size);
+	if (unlikely(ret)) {
+		ttm_bo_unref(&bo);
+		return ERR_PTR(ret);
+	}
+
+	obj->heap = container_of(bo, struct ttm_heap, pbo);
+	bo->persistent_swap_storage = obj->gem.filp;
+	return &obj->gem;
+}