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
33 struct 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
45 struct 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
52 void *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
63 void 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
68 int 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 }