1/*
 2 * Copyright 2014 Canonical
 3 *
 4 * Permission is hereby granted, free of charge, to any person obtaining a
 5 * copy of this software and associated documentation files (the "Software"),
 6 * to deal in the Software without restriction, including without limitation
 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 8 * and/or sell copies of the Software, and to permit persons to whom the
 9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Andreas Pokorny
23 */
24
25#include <drm/drm_prime.h>
26
27#include "virtgpu_drv.h"
28
29/* Empty Implementations as there should not be any other driver for a virtual
30 * device that might share buffers with virtgpu
31 */
32
33struct sg_table *virtgpu_gem_prime_get_sg_table(struct drm_gem_object *obj)
34{
35	struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
36
37	if (!bo->tbo.ttm->pages || !bo->tbo.ttm->num_pages)
38		/* should not happen */
39		return ERR_PTR(-EINVAL);
40
41	return drm_prime_pages_to_sg(bo->tbo.ttm->pages,
42				     bo->tbo.ttm->num_pages);
43}
44
45struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
46	struct drm_device *dev, struct dma_buf_attachment *attach,
47	struct sg_table *table)
48{
49	return ERR_PTR(-ENODEV);
50}
51
52void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj)
53{
54	struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
55	int ret;
56
57	ret = virtio_gpu_object_kmap(bo);
58	if (ret)
59		return NULL;
60	return bo->vmap;
61}
62
63void virtgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
64{
65	virtio_gpu_object_kunmap(gem_to_virtio_gpu_obj(obj));
66}
67
68int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,
69			   struct vm_area_struct *vma)
70{
71	return drm_gem_prime_mmap(obj, vma);
72}