1 | /* |
2 | * Copyright 2011 Red Hat Inc. |
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: Dave Airlie |
23 | */ |
24 | |
25 | #include <linux/dma-buf.h> |
26 | #include <drm/ttm/ttm_tt.h> |
27 | |
28 | #include "nouveau_drv.h" |
29 | #include "nouveau_gem.h" |
30 | |
31 | struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj) |
32 | { |
33 | struct nouveau_bo *nvbo = nouveau_gem_object(gem: obj); |
34 | |
35 | return drm_prime_pages_to_sg(dev: obj->dev, pages: nvbo->bo.ttm->pages, |
36 | nr_pages: nvbo->bo.ttm->num_pages); |
37 | } |
38 | |
39 | struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev, |
40 | struct dma_buf_attachment *attach, |
41 | struct sg_table *sg) |
42 | { |
43 | struct nouveau_drm *drm = nouveau_drm(dev); |
44 | struct drm_gem_object *obj; |
45 | struct nouveau_bo *nvbo; |
46 | struct dma_resv *robj = attach->dmabuf->resv; |
47 | u64 size = attach->dmabuf->size; |
48 | int align = 0; |
49 | int ret; |
50 | |
51 | dma_resv_lock(obj: robj, NULL); |
52 | nvbo = nouveau_bo_alloc(&drm->client, size: &size, align: &align, |
53 | NOUVEAU_GEM_DOMAIN_GART, tile_mode: 0, tile_flags: 0, internal: true); |
54 | if (IS_ERR(ptr: nvbo)) { |
55 | obj = ERR_CAST(ptr: nvbo); |
56 | goto unlock; |
57 | } |
58 | |
59 | nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART; |
60 | |
61 | nvbo->bo.base.funcs = &nouveau_gem_object_funcs; |
62 | |
63 | /* Initialize the embedded gem-object. We return a single gem-reference |
64 | * to the caller, instead of a normal nouveau_bo ttm reference. */ |
65 | ret = drm_gem_object_init(dev, obj: &nvbo->bo.base, size); |
66 | if (ret) { |
67 | nouveau_bo_ref(NULL, pnvbo: &nvbo); |
68 | obj = ERR_PTR(error: -ENOMEM); |
69 | goto unlock; |
70 | } |
71 | |
72 | ret = nouveau_bo_init(nvbo, size, align, NOUVEAU_GEM_DOMAIN_GART, |
73 | sg, robj); |
74 | if (ret) { |
75 | obj = ERR_PTR(error: ret); |
76 | goto unlock; |
77 | } |
78 | |
79 | obj = &nvbo->bo.base; |
80 | |
81 | unlock: |
82 | dma_resv_unlock(obj: robj); |
83 | return obj; |
84 | } |
85 | |
86 | int nouveau_gem_prime_pin(struct drm_gem_object *obj) |
87 | { |
88 | struct nouveau_bo *nvbo = nouveau_gem_object(gem: obj); |
89 | int ret; |
90 | |
91 | /* pin buffer into GTT */ |
92 | ret = nouveau_bo_pin(nvbo, NOUVEAU_GEM_DOMAIN_GART, contig: false); |
93 | if (ret) |
94 | return -EINVAL; |
95 | |
96 | return 0; |
97 | } |
98 | |
99 | void nouveau_gem_prime_unpin(struct drm_gem_object *obj) |
100 | { |
101 | struct nouveau_bo *nvbo = nouveau_gem_object(gem: obj); |
102 | |
103 | nouveau_bo_unpin(nvbo); |
104 | } |
105 | |
106 | struct dma_buf *nouveau_gem_prime_export(struct drm_gem_object *gobj, |
107 | int flags) |
108 | { |
109 | struct nouveau_bo *nvbo = nouveau_gem_object(gem: gobj); |
110 | |
111 | if (nvbo->no_share) |
112 | return ERR_PTR(error: -EPERM); |
113 | |
114 | return drm_gem_prime_export(obj: gobj, flags); |
115 | } |
116 | |