xref: /linux/drivers/gpu/drm/virtio/virtgpu_prime.c (revision 8b4483658364f05b2e32845c8f445cdfd9452286)
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 "virtgpu_drv.h"
26 
27 /* Empty Implementations as there should not be any other driver for a virtual
28  * device that might share buffers with virtgpu
29  */
30 
31 int virtgpu_gem_prime_pin(struct drm_gem_object *obj)
32 {
33 	WARN_ONCE(1, "not implemented");
34 	return -ENODEV;
35 }
36 
37 void virtgpu_gem_prime_unpin(struct drm_gem_object *obj)
38 {
39 	WARN_ONCE(1, "not implemented");
40 }
41 
42 struct sg_table *virtgpu_gem_prime_get_sg_table(struct drm_gem_object *obj)
43 {
44 	return ERR_PTR(-ENODEV);
45 }
46 
47 struct drm_gem_object *virtgpu_gem_prime_import_sg_table(
48 	struct drm_device *dev, struct dma_buf_attachment *attach,
49 	struct sg_table *table)
50 {
51 	return ERR_PTR(-ENODEV);
52 }
53 
54 void *virtgpu_gem_prime_vmap(struct drm_gem_object *obj)
55 {
56 	struct virtio_gpu_object *bo = gem_to_virtio_gpu_obj(obj);
57 	int ret;
58 
59 	ret = virtio_gpu_object_kmap(bo);
60 	if (ret)
61 		return NULL;
62 	return bo->vmap;
63 }
64 
65 void virtgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
66 {
67 	virtio_gpu_object_kunmap(gem_to_virtio_gpu_obj(obj));
68 }
69 
70 int virtgpu_gem_prime_mmap(struct drm_gem_object *obj,
71 		       struct vm_area_struct *area)
72 {
73 	return -ENODEV;
74 }
75